2025 in arthropod paleontology

In 2025, several new arthropod fossil taxa, including arachnids, crustaceans, trilobites, and other arthropods (for insects, see 2025 in paleoentomology) were announced or described. Other significant arthropod paleontological discoveries and events also occurred in 2025.

Chelicerates

Arachnids

Amblypygi

Name	Novelty	Status	Authors	Age	Type locality	Location	Notes	Image
Phrynus luisdearmasi^[1]	Sp. nov	Valid	Dunlop & Bartel	Miocene (probably Burdigalian)	Dominican amber	Dominican Republic	A species of Phrynus.
Phrynus poinari^[1]	Nom. nov	Valid	Dunlop & Bartel	Miocene	Mexican amber	Mexico	A species of Phrynus; a replacement name for Phrynus mexicana Poinar & Brown (2004).

Araneae

Name	Novelty	Status	Authors	Age	Type locality	Location	Notes
Balticonesticus rectus^[2]	Sp. nov	Valid	Wunderlich	Eocene	Baltic amber	Europe (Baltic Sea region)	A scaffold web spider.
Baltplanarchaea^[3]	Gen. et comb. nov	Valid	Wunderlich	Eocene	Baltic amber	Europe (Baltic Sea region)	A spider belonging to the family Planarchaeidae. The type species is "Planarchaea" oblonga Wunderlich (2017).
Burmesarchaea spinicaput^[3]	Sp. nov	Valid	Wunderlich	Cretaceous	Kachin amber	Myanmar	A spider belonging to the family Archaeidae.
Cornuanandrus scutatus^[2]	Sp. nov	Valid	Wunderlich	Eocene	Baltic amber	Europe (Baltic Sea region)	A spider belonging to the family Synotaxidae.
Furczarqa^[4]	Gen. et sp. nov	Valid	Wunderlich	Cretaceous	Kachin amber	Myanmar	A spider belonging to the family Zarqaraneidae. The type species is F. incerta.
Fushunpalpimanus^[5]	Gen. et sp. nov	Valid	Wunderlich	Eocene	Fushun amber	China	A spider belonging to the family Palpimanidae. The type species is F. exuviae.
Heteronesticus acuminatus^[2]	Sp. nov	Valid	Wunderlich	Eocene	Baltic amber	Europe (Baltic Sea region)	A scaffold web spider.
Heteronesticus bitterfeldensis^[2]	Sp. nov	Valid	Wunderlich	Eocene	Bitterfeld amber	Germany	A scaffold web spider.
Longthorax^[6]	Nom. nov	Valid	Wunderlich	Cretaceous	Kachin amber	Myanmar	A spider belonging to the family Tetrablemmidae; a replacement name for Longithorax Wunderlich (2017).
Microlininus^[6]	Nom. nov	Valid	Wunderlich	Eocene	Baltic amber	Europe (Baltic Sea region)	A replacement name for Microlinus Wunderlich (2004).
?Mimetus flexuosus^[2]	Sp. nov	Valid	Wunderlich	Eocene	Baltic amber	Europe (Baltic Sea region)	A possible species of Mimetus.
Parvispinina^[6]	Nom. nov	Valid	Wunderlich	Cretaceous	Kachin amber	Myanmar	A spider belonging to the family Zarqaraneidae; a replacement name for Parvispina Wunderlich (2015).
Pectenzodarion^[2]	Gen. et sp. nov	Valid	Wunderlich	Eocene	Baltic amber	Europe (Baltic Sea region)	An ant spider. The type species is P. unicum.
Planarchaea humilis^[3]	Sp. nov	Valid	Wunderlich	Cretaceous	Kachin amber	Myanmar	A spider belonging to the family Planarchaeidae.
Planarchaea longipalpitibia^[3]	Sp. nov	Valid	Wunderlich	Cretaceous	Kachin amber	Myanmar	A spider belonging to the family Planarchaeidae.
Planarchaea petersi^[3]	Sp. nov	Valid	Wunderlich	Cretaceous	Kachin amber	Myanmar	A spider belonging to the family Planarchaeidae.
Planarchaea quinquespinae^[3]	Sp. nov	Valid	Wunderlich	Cretaceous	Kachin amber	Myanmar	A spider belonging to the family Planarchaeidae.
Succinitaxus pusillus^[2]	Sp. nov	Valid	Wunderlich	Eocene	Baltic amber	Europe (Baltic Sea region)	A spider belonging to the family Synotaxidae.
Succinitaxus strepitus^[2]	Sp. nov	Valid	Wunderlich	Eocene	Baltic amber Bitterfeld amber	Baltic Sea region Germany	A spider belonging to the family Synotaxidae.

Spider research

A female spider belonging to the genus Parvosegestria interpreted as preserved guarding her clutch of eggs and offspring partly free from their cover is described of a piece of Cretaceous Kachin amber by Wunderlich (2025).^[7]
Córdova-Tabares, Estrada-Ruiz & Riquelme (2025) report the first discovery of a ray spider specimen in the Mexican amber.^[8]

Ixodida

Name	Novelty	Status	Authors	Age	Type locality	Location	Notes	Image
Amblyomma arawakan^[9]	Sp. nov	Valid	Chitimia-Dobler & Martins in Milde et al.	Miocene	Dominican amber	Dominican Republic	A hard tick, a species of Amblyomma.

Pseudoscorpiones

Name	Novelty	Status	Authors	Age	Type locality	Location	Notes
Echinochelifer^[10]	Gen. et sp. nov		Feng et al.	Cretaceous	Kachin amber	Myanmar	A member of the family Cheliferidae. The type species is E. curvatus.
Lechytia finniae^[11]	Sp. nov		Hagen et al.	Late Cretaceous (Cenomanian)	Kachin amber	Myanmar	A species of Lechytia.
Palaeochiridium^[12]	Gen. et sp. nov	Valid	Turbanov et al.	Cretaceous		Myanmar	A member of the family Pseudochiridiidae. The type species is P. insolitum.

Sarcoptiformes

Name	Novelty	Status	Authors	Age	Type locality	Location	Notes
Azarliodes^[13]	Gen. et comb. nov		Arillo & Gutiérrez	Early Cretaceous	Lebanese amber	Lebanon	A mite belonging to the family Neoliodidae; a new genus for "Neoliodes" andreneli Arillo et al. (2019).
Histiogaster altilis^[14]	Sp. nov	Valid	Kolesnikov et al.	Eocene	Rovno amber	Ukraine	A species of Histiogaster.
Paralycus ekaterinae^[15]	Sp. nov	Valid	Kolesnikov et al.	Eocene (Priabonian)	Rovno amber	Ukraine	A member of Oribatida belonging to the family Pediculochelidae.
Paralycus primus^[15]	Sp. nov	Valid	Kolesnikov et al.	Late Cretaceous (Cenomanian)	Kachin amber	Myanmar	A member of Oribatida belonging to the family Pediculochelidae.
Plesioglyphus^[16]	Gen. et sp. nov	Valid	Sendi et al.	Early Cretaceous (Barremian)	Lebanese amber	Lebanon	A member of the family Schizoglyphidae. The type species is P. lebanotermi.

Sarcoptiform research

Klimov et al. (2025) revise Protospeleorchestes pseudoprotacarus, Paraprotacarus hirsti and Palaeotydeus devonicus from the Devonian Rhynie chert (United Kingdom) and interpret them all as junior synonyms of Protacarus crani, assigned by the authors to the new family Protoacaridae within Endeostigmata; the authors also study the diversification timeline of acariform mites, and argue that the crown group of Acariformes originated during the Cambrian, at the time of colonization of lands by bryophytes.^[17]

Scorpiones

Name	Novelty	Status	Authors	Age	Type locality	Location	Notes
Archaeoananteroides carusoi^[18]	Sp. nov	Valid	Lourenço in Lourenço & Velten	Cretaceous	Kachin amber	Myanmar	A scorpion belonging to the superfamily Buthoidea and the family Ananteridae.
Betaburmesebuthus groehni^[19]	Sp. nov	Valid	Lourenço in Lourenço & Velten	Cretaceous	Probably Kachin amber	Myanmar	A scorpion belonging to the superfamily Buthoidea and the family Palaeoburmesebuthidae.
Betaburmesebuthus petersi^[20]	Sp. nov	Valid	Lourenço in Lourenço & Velten	Cretaceous	Probably Kachin amber	Myanmar	A scorpion belonging to the superfamily Buthoidea and the family Palaeoburmesebuthidae.
Burmesescorpiops wunpawng^[21]	Sp. nov	Valid	Lourenço, Dan & Zawgyi	Cretaceous	Kachin amber	Myanmar	A scorpion belonging to the family Palaeoeuscorpiidae.
Cretaceoushormiops petersi^[22]	Sp. nov	Valid	Lourenço in Lourenço & Velten	Cretaceous	Kachin amber	Myanmar	A scorpion belonging to the family Protoischnuridae.
Jeholia^[23]	Gen. et sp. nov	Valid	Xuan et al.	Early Cretaceous	Yixian Formation	China	A member of Buthida of uncertain affinities. The type species is J. longchengi.
Palaeoburmesebuthus sarahmeyerae^[24]	Sp. nov	Valid	Lourenço in Lourenço & Velten	Cretaceous	Kachin amber	Myanmar	A scorpion belonging to the superfamily Buthoidea and the family Palaeoburmesebuthidae.
Palaeobutheolus^[25]	Gen. et 2 sp. nov	Valid	Lourenço in Lourenço & Velten	Cretaceous	Kachin amber	Myanmar	A scorpion, possibly a member of the family Buthidae. The type species is P. andreschmidti; genus also includes P. staxi.^[26]
Paratrilineatus^[27]	Gen. et sp. nov	Valid	Lourenço in Lourenço & Velten	Cretaceous	Kachin amber	Myanmar	A scorpion belonging to the superfamily Buthoidea and the family Palaeotrilineatidae. The type species is P. schmidti.
Serratochaerilobuthus barbarae^[28]	Sp. nov	Valid	Lourenço & Velten	Cretaceous	Kachin amber	Myanmar

Scorpion research

Callaghan & Boyce (2025) argue that a footless posture does not provide strong support for an aquatic habitat in fossil scorpions by itself, interpret the fossil evidence as overall supporting terrestrial origin of total group of Scorpiones.^[29]
Xuan et al. (2025) revise scorpions from the family Chaerilobuthidae known from the Cretaceous Kachin amber from Myanmar, reinterpret Chaeriloiurus and Serratochaerilobuthus as junior synonyms of the genus Chaerilobuthus, and rerank the family Chaerilobuthidae itself as a subfamily belonging to the family Pseudochactidae.^[30]

Trombidiformes

Name	Novelty	Status	Authors	Age	Type locality	Country	Notes
Caeculus aeternus^[31]	Sp. nov		Porta et al.	Eocene	Baltic amber	Europe (Baltic Sea region)	A member of the family Caeculidae.
Cretachyzeria^[32]	Gen. et sp. nov	Valid	Liu, Fan & Ren	Late Cretaceous (Cenomanian)	Kachin amber	Myanmar	A member of the family Chyzeriidae. The type species is C. macroseta.
Punkochyzeria^[33]	Gen. et 3 sp. nov	Valid	Kolesnikov, Turbanov & Vorontsov	Cretaceous	Kachin amber	Myanmar	A member of the family Chyzeriidae. Genus includes new species P. minaevi, P. makolae and P. khoyi.
Scleroerythraeus^[34]	Gen. et sp. nov		Costa et al.	Eocene	Baltic amber	Russia ( Kaliningrad Oblast)	An erythraeid mite. Genus includes new species S. ferox.

Trombidiform research

New caeculid specimens, including the first fossil caeculid larva, are described from the Cretaceous Kachin amber from Myanmar by Gerbe et al. (2025).^[35]

Uropygi

Name	Novelty	Status	Authors	Age	Type locality	Country	Notes	Images
Mesothelyphonus xiaoae^[36]	Sp. nov		Wu et al.	Cretaceous	Kachin amber	Myanmar	A whip scorpion.

Other arachnids

Other arachnid research

Santos et al. (2025) describe fossil material of Gzhelian trigonotarbids: Aphantomartus sp. from the Bierzo Coalfield and Aphantomartus areolatus from the Villablino Coalfield (Spain), associated with plant remains indicating that the studied arachnids likely lived in humid evergreen forests.^[37]

Eurypterids

Name	Novelty	Status	Authors	Age	Type locality	Country	Notes
Athenepterus^[38]	Gen. et comb. nov	Valid	Lamsdell	Silurian (Přídolí)		United Kingdom	A member of the family Hardieopteridae. The type species is "Eurypterus" megalops Salter (1859); genus also includes A. sigmoidalis (Kjellesvig-Waering, 1971).
Barusopterus^[38]	Gen. et comb. nov	Valid	Lamsdell	Silurian (Ludlow)		United States ( Indiana)	A member of Dolichopteroidea belonging to the family Strobilopteridae. The type species is "Onychopterus" limuloides Kjellesvig-Waering (1948).
?Carcinosoma aurorae^[39]	Sp. nov	Valid	Van Roy, Richards & Ortega-Hernández	Ordovician (Tremadocian)	Fezouata Formation	Morocco
Cruinnopterus^[38]	Gen. et comb. nov	Valid	Lamsdell	Silurian (Llandovery–Wenlock)		Canada ( Ontario) United Kingdom	A member of the family Carcinosomatidae. The type species is "Eurypterus" scorpioides Woodward (1868); genus also includes C. scotica (Laurie, 1899).
Hunanopterus^[38]	Fam. et gen. et comb. nov	Valid	Lamsdell	Silurian (Llandovery–Přídolí)		China	A member of the superfamily Pterygotoidea, the type genus of the new family Hunanopteridae. The type species is "Hughmilleria" wangi Tetlie, Selden & Ren (2007).
Selkiepterella^[38]	Gen. et comb. nov	Valid	Lamsdell	Silurian (Llandovery–Přídolí)		United Kingdom	A member of the family Adelophthalmidae. The type species is "Himantopterus" lanceolata Salter (1856); genus also includes S. cephalaspis (Salter in Sedgwick and McCoy, 1855).
Tigrisopterus^[40]	Gen. et sp. nov		Wang, Sun & Zhang	Devonian (Lochkovian)	Nagaoling Formation	China	A member of the family Carcinosomatidae. The type species is T. zengi.
Waterstonopterus^[38]	Gen. et comb. nov	Valid	Lamsdell	Silurian (Llandovery–Wenlock)		United Kingdom United States ( Pennsylvania)	A member of the family Hardieopteridae. The type species is "Hardieopterus" lanarkensis Waterston (1979); genus also includes W. myops (Clarke, 1907).

Eurypterid research

Wang et al. (2025) revise Devonian pterygotid eurypterids from the Xiaxishancun Formation (Yunnan, China) and introduce a new nomenclature to define the cheliceral denticles of pterygotids.^[41]

Xiphosurans

Name	Novelty	Status	Authors	Age	Type locality	Country	Notes	Images
Ciurcalimulus^[42]	Gen. et sp. nov	Valid	Lamsdell	Silurian (Ludlow)	Wabash Formation	United States ( Indiana)	The type species is C. discobolus.
Lunataspis gundersoni^[43]	Sp. nov		Lamsdell et al.	Ordovician (Katian)	Big Hill Formation	United States ( Michigan)	Bears an unusually elongated shovel-shaped prosoma with recurved spines.

Xiphosuran research

Evidence indicating that fusion of the opisthosomal segments happened once in the common ancestor to Xiphosura, while loss of visible segment boundaries happened several times during the xiphosuran evolution, is presented by Lamsdell & Ocon (2025).^[44]

Other chelicerates

Name	Novelty	Status	Authors	Age	Type locality	Country	Notes	Images
Smotrychaspis^[45]	Gen. et sp. nov		Smith & Selden	Silurian (Homerian to Gorstian)	Ustya Formation	Ukraine	A synziphosurine chelicerate. The type species is S. kurtopleurae.

Other chelicerate research

Strausfeld, Andrew & Hirth (2025) report evidence of organization of prosoma and cerebrum of Mollisonia symmetrica similar to those observed in extant arachnids, and intepret Mollisonia as likely to be a stem-arachnid phylogenetically close to the arachnid crown group.^[46]
Lustri et al. (2025) propose that chelicerates belonging to the family Offacolidae were suspension feeders.^[47]

Crustaceans

Malacostracans

Name	Novelty	Status	Authors	Age	Type locality	Country	Notes
Alahexapus^[48]	Gen. et comb. nov	Valid	Klompmaker et al.	Paleocene (Danian)	Clayton Formation	United States ( Alabama)	A crab belonging to the family Hexapodidae. The type species is "Stevea" martini Feldmann, Schweitzer & Portell (2014).
Alloranina^[49]	Gen. et sp. et comb. nov	Valid	Ferratges et al.	Eocene to Miocene	Serraduy Formation	Italy Spain	A crab belonging to the family Raninidae. The type species is A. arjae; genus also includes "Ranina" pellattieroi de Angeli & Beschin (2011).
Alonteucosia^[50]	Gen. et sp. nov	Valid	De Angeli & Marangon	Eocene		Italy	A crab belonging to the family Leucosiidae. The type species is A. hepatituberculata.
Alphacheles^[48]	Gen. et comb. nov	Valid	Klompmaker et al.	Paleocene (Danian)	Porters Creek Formation	United States ( Alabama)	A member of the family Ctenochelidae. The type species is "Callianassa" zeta Rathbun (1936).
Alpheus indicus^[51]	Sp. nov	Valid	Amal, Kapur & Prasanna	Miocene (Burdigalian)	Quilon Formation	India	A species of Alpheus.
Arcticocarcinus americanus^[52]	Sp. nov	Valid	Schweitzer	Eocene	Vincentown Formation	United States ( New Jersey)	A crab belonging to the family Necrocarcinidae.
Aridelocaris^[53]	Gen. et sp. nov		Schweitzer & Schram	Carboniferous (Tournaisian)		United States ( Ohio)	A member of Phyllocarida belonging to the family Sairocarididae. The type species is A. ohioensis.
Balticoniscus^[54]	Gen. et sp. nov	Valid	Kästle & Ludwig	Eocene	Prussian Formation (Baltic amber)	Poland	A woodlouse belonging to the group Crinocheta. The type species is B. walterludwigi.
Bathypaguropsis alontensis^[50]	Sp. nov	Valid	De Angeli & Marangon	Eocene		Italy	A hermit crab belonging to the family Paguridae.
Carpilius feldmanni^[55]	Sp. nov	Valid	Ferratges et al.	Eocene	Serraduy Formation	Spain	A crab, a species of Carpilius.
Ceronnectes rugosus^[55]	Sp. nov	Valid	Ferratges et al.	Eocene	Serraduy Formation	Spain	A crab belonging to the family Cancridae.
Costacopluma nicksabani^[48]	Sp. nov	Valid	Klompmaker et al.	Paleocene (Danian)	Clayton Formation	United States ( Alabama)	A crab belonging to the family Retroplumidae.
Cretapalibythus^[56]	Gen. et sp. nov	Valid	Charbonnier, Garassino & Brochet	Early Cretaceous (Aptian)		France	A furry lobster. The type species is C. moniquae.
Cretatrizocheles rodfeldmanni^[57]	Sp. nov	Valid	Gašparič et al.	Early Cretaceous (Aptian or Albian)		Slovenia	A hermit crab belonging to the family Pylochelidae.
?Diogenes jafrii^[58]	Sp. nov		Ossó et al.	Eocene	Drazinda Formation	Pakistan	Possibly a species of Diogenes.
Distefania pimientai^[59]	Comb. nov	Valid	(Ferratges & Zamora in García-Penas et al.)	Early Cretaceous (Aptian)		Spain	A member of the family Dromiidae belonging to the subfamily Goniodromitinae; moved from Palaeodromites pimientai Ferratges & Zamora in García-Penas et al. (2023).
Dysopodus^[60]	Gen. et sp. nov	Valid	Schädel et al.	Early Cretaceous (Barremian)		Lebanon	An isopod belonging to the group Cymothoida. The type species is D. gezei.
Eocalcinus manfrinatoensis^[50]	Sp. nov	Valid	De Angeli & Marangon	Eocene		Italy	A hermit crab belonging to the family Diogenidae.
Eohexapus simplex^[55]	Sp. nov	Valid	Ferratges et al.	Eocene	Serraduy Formation	Spain	A crab belonging to the family Hexapodidae.
Eomunidopsis rigolleti^[59]	Sp. nov	Valid	Ossó et al.	Early Cretaceous (Aptian)	Forcall Formation	Spain	A member of the family Galatheidae.
Eucalliaxiopsis alabamensis^[48]	Comb. nov	Valid	(Rathbun)	Paleocene (Danian)	Porters Creek Formation	United States ( Alabama)	A member of the family Eucalliacidae; moved from Callianassa alabamensis Rathbun (1935).
Eumorphia fabianmuelleri^[61]	Sp. nov	Valid	Charbonnier et al.	Middle Jurassic (Callovian)	Ornatenton Formation	Germany	A member of the family Mecochiridae.
Feldmannicarcinus^[52]	Gen. et comb. et sp. nov	Valid	Schweitzer	Eocene	Castle Hayne Formation	United States ( New Jersey North Carolina)	A crab belonging to the family Tumidocarcinidae. The type species is "Glyphithyreus" sturgeoni Feldmann et al. (1998); genus also includes new species F. hajzeri.
Galenopsis ossoi^[55]	Sp. nov	Valid	Ferratges et al.	Eocene	Serraduy Formation	Spain	A crab belonging to the family Pilumnidae.
Garapitoplax^[62]	Gen. et comb. nov	Valid	Nyborg, Garassino & Vega	Paleocene		United States ( California)	A crab belonging to the family Goneplacidae; a new genus for "Cyclocorystes" aldersoni Squires (1980).
Grimothea nishioi^[63]	Comb. nov	Valid	(Karasawa)	Miocene		Japan	A species of Grimothea; moved from Munida nishioi Karasawa (1993).
Grimothea ogaensis^[63]	Comb. nov	Valid	(Hatai & Kotaka)	Miocene		Japan	A species of Grimothea; moved from Kazuoia ogaensis Hatai & Kotaka (1970).
Huescarina^[49]	Gen. et sp. et comb. nov	Valid	Ferratges et al.	Eocene	Serraduy Formation	Italy Spain	A crab belonging to the family Raninidae. The type species is H. vanbakeli; genus also includes "Laeviranina" pulchra Beschin et al. (1998).
Hyastenus bericus^[50]	Sp. nov	Valid	De Angeli & Marangon	Eocene		Italy	A species of Hyastenus.
Hyphalocarcinus^[64]	Gen. et comb. nov	Valid	Schweitzer, Klompmaker & Luque	Paleocene		Mexico United States ( Alabama Texas)	A crab belonging to the superfamily Carpilioidea and the family Palaeoxanthopsidae. The type species is "Dromilites" americana Rathbun (1935).
Karumballichirus khadroensis^[65]	Comb. nov	Valid	(Hyžný & Charbonnier in Hyžný et al.)	Paleocene (Danian)	Khadro Formation	Pakistan	A member of Axiidea belonging to the family Callichiridae; moved from Neocallichirus khadroensis Hyžný & Charbonnier in Hyžný et al. (2016).
Karumballichirus lakhraensis^[65]	Comb. nov	Valid	(Hyžný & Charbonnier in Hyžný et al.)	Paleocene (Thanetian)?–Eocene (Ypresian)	Lakhra Formation	Pakistan	A member of Axiidea belonging to the family Callichiridae; moved from Neocallichirus lakhraensis Hyžný & Charbonnier in Hyžný et al. (2016).
Karumballichirus maximus^[65]	Comb. nov	Valid	(Milne-Edwards)	Holocene		Thailand	A member of Axiidea belonging to the family Callichiridae; moved from Callianassa maxima Milne-Edwards (1870).
Laeviprosopon gignouxi^[56]	Comb. nov	Valid	(Van Straelen)	Early Cretaceous (Hauterivian)		France	A crab belonging to the family Homolidae; moved from Prosopon gignouxi Van Straelen (1928).
Linuparus petrocorii^[66]	Sp. nov		Charbonnier et al.	Late Jurassic (Kimmeridgian)		France	A species of Linuparus
Liocarcinus tridentatus^[55]	Sp. nov	Valid	Ferratges et al.	Eocene	Serraduy Formation	Spain	A crab, a species of Liocarcinus.
Lobetelson feldmanni^[67]	Sp. nov	Valid	Klompmaker et al.	Carboniferous (Kasimovian)	Atrasado Formation	United States ( New Mexico)	A member of Belotelsonidea.
Locomius^[55]	Gen. et sp. nov	Valid	Ferratges et al.	Eocene	Serraduy Formation	Spain	A crab, a member of Cancroidea of uncertain affinities. The type species is L. parthenopimimus.
Macrocheira enoptra^[68]	Sp. nov	Valid	Schweitzer	Eocene	Lookingglass Formation	United States ( Oregon)	A species of Macrocheira.
Mandocaris^[69]	Gen. et sp. nov	Valid	Lagrange et al.	Middle Jurassic (Callovian)	La Voulte-sur-Rhône lagerstätte	France	A member of to the family Acanthephyridae. The type species is M. polyphaga.
Matutsalen^[55]	Gen. et sp. nov	Valid	Ferratges et al.	Eocene	Serraduy Formation	Spain	A crab belonging to the group Carpilioidea, possibly a member of the family Arabicarcinidae. The type species is M. rotundus.
Megaceradocus umemotoi^[70]	Sp. nov	Valid	Ando & Mizuno	Miocene	Yamami Formation	Japan	An amphipod belonging to the family Maeridae.
Microboschettia^[55]	Gen. et sp. nov	Valid	Ferratges et al.	Eocene	Serraduy Formation	Spain	A crab belonging to the family Carcinidae. The type species is M. elegans.
Mioapseudes^[71]	Gen. et sp. nov	Valid	Wallaard	Miocene		Cyprus	A tanaidacean. The type species is M. mediterraneus.
Morellosia^[59]	Gen. et sp. nov	Valid	Ossó et al.	Early Cretaceous (Aptian)	Forcall Formation	Spain	A member of the family Etyiidae. The type species is M. maestratensis.
Nahecaris carlsi^[72]	Sp. nov		Zamora et al.	Devonian (Pragian)	Santa Cruz Formation	Spain	A member of Phyllocarida belonging to the family Rhinocarididae.
Neocallichirus? priscus^[73]	Comb. nov	Valid	(Milne-Edwards)	Eocene		France	A member of the family Callichiridae; moved from Callianassa prisca Milne-Edwards (1860).
Notopoides ovaloides^[49]	Sp. nov	Valid	Ferratges et al.	Eocene	Serraduy Formation	Spain	A crab belonging to the family Raninidae.
Oncopareia californiana^[74]	Sp. nov	Valid	Garassino, Pasini & Nyborg	Late Cretaceous (Turonian)	Ladd Formation	United States ( California)	A lobster.
Paguristes dallagoi^[50]	Sp. nov	Valid	De Angeli & Marangon	Eocene		Italy	A species of Paguristes.
Palaeastacus ruteni^[66]	Sp. nov		Charbonnier et al.	Middle Jurassic (Bathonian)		France	A member of the family Erymidae.
Palaeomyra eocaenica^[50]	Sp. nov	Valid	De Angeli & Marangon	Eocene		Italy	A crab belonging to the family Leucosiidae.
Parhalimede antiqua^[55]	Sp. nov	Valid	Ferratges et al.	Eocene	Serraduy Formation	Spain	A crab belonging to the family Galenidae.
Pelorophontes^[75]	Gen. et sp. nov		Schweitzer & Schram	Carboniferous (Moscovian)		United States ( Oklahoma)	A member of the family Gorgonophontidae. The type species is P. mayi.
Philyra antiqua^[50]	Sp. nov	Valid	De Angeli & Marangon	Eocene		Italy	A crab belonging to the family Leucosiidae.
Pseudoplakolana^[60]	Gen. et comb. nov	Valid	Schädel et al.	Early Cretaceous (Aptian)	Sierra Madre Formation	Mexico	An isopod belonging to the group Cymothoida. The type species is "Plakolana" chiapaneca Bruce et al. (2021).
Quasilaeviranina arafita^[49]	Sp. nov	Valid	Ferratges et al.	Eocene	Serraduy Formation	Spain	A crab belonging to the family Raninidae.
Quasilaeviranina yvonnecoeleae^[50]	Sp. nov	Valid	De Angeli & Marangon	Eocene		Italy	A crab belonging to the family Raninidae.
Raninoides danicus^[48]	Sp. nov	Valid	Klompmaker et al.	Paleocene (Danian)	Clayton Formation	United States ( Alabama)	A crab belonging to the family Raninidae.
Rodneyellus^[76]	Gen. et sp. nov	Valid	Lima et al.		Pirabas Formation	Brazil	A crab belonging to the family Hexapodidae. Genus includes new species R. feldmanni.
Sabellidromites santamarta^[77]	Sp. nov	Valid	Lima et al.	Late Cretaceous (Santonian–Campanian)	Santa Marta Formation	Antarctica	A crab belonging to the family Dynomenidae.
Santeella italica^[50]	Sp. nov	Valid	De Angeli & Marangon	Eocene		Italy	A crab belonging to the family Pilumnidae.
Serraranina^[78]	Gen. et sp. nov	Valid	Van Bakel, Fraaije & Jagt	Paleocene (Danian)		Denmark Germany	A raninid crab. Genus includes new species S. stefanpolkowskyi.
Stenodactylina souconnae^[66]	Sp. nov		Charbonnier et al.	Middle Jurassic (Bajocian)		France	A member of the family Erymidae.
Synoriacarcinus^[79]	Gen. et comb. nov	Valid	Schweitzer, Feldmann & Findling	Late Cretaceous (Turonian to Campanian)	Merchantville Formation	United States ( Delaware)	A crab belonging to the family Ibericancridae. The type species is "Diaulax" millerae Bishop (1992); genus also includes "Seorsus" kauffmani Feldmann et al. (2013) from the Mancos Shale (New Mexico, United States).
Trapezionida chiyoensis^[63]	Sp. nov	Valid	Karasawa & Kato	Miocene		Japan	A species of Trapezionida.
Viapagurus covavidrensis^[59]	Sp. nov	Valid	Ossó et al.	Early Cretaceous (Aptian)	Forcall Formation	Spain	A member of the family Paguridae.
Wauregania^[62]	Gen. et comb. nov	Valid	Nyborg, Garassino & Vega	Eocene		United States ( California)	A crab belonging to the family Goneplacidae; a new genus for "Plagiolophus" weaveri Rathbun (1926).
Xanthilites robustus^[55]	Sp. nov	Valid	Ferratges et al.	Eocene	Serraduy Formation	Spain	A crab belonging to the family Tumidocarcinidae.

Malacostracan research

Bicknell et al. (2025) study two clusters of Archaeoniscus brodiei from the Berriasian Durlston Formation (United Kingdom), providing new information on the anatomy of the studied isopod.^[80]
New information on the morphology of Beurlenia araripensis is provided by Lima et al. (2025).^[81]
Mychko (2025) describes fossil material of Palaeastacus aff. solitarius from the Tithonian strata from the Cheryomukha River Basin (Yaroslavl Oblast, Russia), extending known geographical range of Late Jurassic members of the genus Palaeastacus.^[82]
A study on the distribution and diversity of members of the family Glypheidae throughout their evolutionary history is published by Damborenea et al. (2025).^[83]
Worthy et al. (2025) identify fossil material (molar ridges of the mandible) of at least three taxa of parastacids from the Miocene Bannockburn Formation (New Zealand), providing evidence of greater diversity of parastacids in New Zealand in the Miocene compared to the present.^[84]
Baucon et al. (2025) report the discovery of vertical burrows from a new Carnian site from the Travenanzes Formation (Italy), possibly representing the oldest fossil evidence of true crabs reported to date.^[85]
Mychko, Schweitzer & Feldmann (2025) describe fossil material of Gastrosacus wetzleri and Goniodromites aliquantulus from Oxfordian reef limestones of the North Caucasus (Russia), expanding known geographical range of both taxa.^[86]

Ostracods

Name	Novelty	Status	Authors	Age	Type locality	Country	Notes
Abyssocypris waleedi^[87]	Sp. nov	Valid	Sadeeq & Aziz	Paleogene	Aaliji Formation	Iraq	A member of the family Pontocyprididae.
Acanthocythereis kunihiroi^[88]	Sp. nov	Valid	Irizuki in Irizuki et al.	Miocene	Yoshino Formation	Japan	A member of the family Trachyleberididae.
Acanthoscapha elenae^[89]	Nom. nov	Valid	Guillam & Hambardzumyan	Devonian		France	A replacement name for Bairdia rostrata Peneau (1929).
Acrocythere zakharovi^[90]	Sp. nov	Valid	Tesakova & Franz in Franz, Tesakova & Schweigert	Jurassic		Germany
Aechmina cuyanensis^[91]	Sp. nov	Valid	Salas, Sterren & Cisterna	Carboniferous		Argentina
Aparchitellina lenis^[92]	Sp. nov	Valid	Sobolev	Devonian	Yba Formation	Russia
Aparchitellina reticulata^[92]	Sp. nov	Valid	Sobolev	Devonian	Yba Formation	Russia
Aurila costabausaensis^[93]	Sp. nov		Sciuto, Baldanza & Reitano	Pliocene		Italy
Aurila daphnidis^[93]	Sp. nov		Sciuto, Baldanza & Reitano	Pliocene		Italy
Aurila mazzarinoensis^[93]	Sp. nov		Sciuto, Baldanza & Reitano	Pliocene		Italy
Aurila sanctiandreae^[93]	Sp. nov		Sciuto, Baldanza & Reitano	Pliocene		Italy
Aviacypris valcourensis^[94]	Sp. nov	Valid	Zhang et al.	Ordovician	Crown Point Formation	United States ( New York)	A member of the family Longisculidae.
Bairdia azizi^[87]	Sp. nov	Valid	Sadeeq & Aziz	Paleogene	Aaliji Formation	Iraq	A member of Podocopida belonging to the family Bairdiidae.
Bairdia dorsoundulata^[95]	Sp. nov		Mette & Moser	Middle Triassic (Ladinian)	Reifling Formation	Austria	A member of Podocopida belonging to the family Bairdiidae.
Bairdia timorleste^[96]	Sp. nov		Forel in Forel, McCartain & Haig	Triassic		Timor-Leste
Baltonotella erugospinosa^[97]	Sp. nov	Valid	Mcgairy et al.	Ordovician (Katian)	Phu Ngu Formation	Vietnam	A member of Podocopa belonging to the order Beyrichiocopida and the family Aparchitididae.
Bizonidea^[90]	Gen. et comb. nov	Valid	Franz, Tesakova & Schweigert	Jurassic		France Germany	Genus includes "Progonocythere" gublerae Bizon (1958).
Bythoceratina (Praebythoceratina) latesulcata^[90]	Sp. nov	Valid	Franz, Tesakova & Schweigert	Jurassic		Germany
Bythocypris aalijiensis^[87]	Sp. nov	Valid	Sadeeq & Aziz	Paleogene	Aaliji Formation	Iraq
Chargatanella^[98]	Gen. et sp. nov	Valid	Melnikova in Melnikova, Ariunchimeg & Gereltsetseg	Silurian (Llandovery)	Chargat Formation	Mongolia	The type species is C. parva.
Chimaerabinoda^[97]	Gen. et sp. nov	Valid	Mcgairy et al.	Ordovician (Katian)	Phu Ngu Formation	Vietnam	A member of Podocopa belonging to the order Beyrichiocopida and the family Aechminidae. The type species is C. reticulofimbriata.
Cibotoleberis tsuyamensis^[88]	Sp. nov	Valid	Irizuki in Irizuki et al.	Miocene	Yoshino Formation	Japan	A member of the family Trachyleberididae.
Collibolbina corrugata^[97]	Sp. nov	Valid	Mcgairy et al.	Ordovician (Katian)	Phu Ngu Formation	Vietnam	A member of Podocopa belonging to the order Beyrichiocopida and the family Tetradellidae.
Cryptobairdia helenentalia^[95]	Sp. nov		Mette & Moser	Middle Triassic (Ladinian)	Reifling Formation	Austria	A member of Podocopida belonging to the family Bairdiidae.
Cyclocypris bamba^[99]	Sp. nov		Díez-Somolinos et al.	Early Cretaceous (Barremian)		Spain	A species of Cyclocypris.
Cypridea marihoni^[99]	Sp. nov		Díez-Somolinos et al.	Early Cretaceous (Barremian)		Spain	A member of Cypridoidea belonging to the family Cyprideidae.
Cypridea vatra^[99]	Sp. nov		Díez-Somolinos et al.	Early Cretaceous (Barremian)		Spain	A member of Cypridoidea belonging to the family Cyprideidae.
Cythereis hokkaidoensis^[100]	Sp. nov		Tanaka & Nishimura	Late Cretaceous (Campanian)		Japan
Cytherella kurdistaniensis^[101]	Sp. nov		Qadafary, Taha & Kharajiany	Paleogene	Kolosh Formation	Iraq	A species of Cytherella.
Cytherella qaradaghiensis^[101]	Sp. nov		Qadafary, Taha & Kharajiany	Paleogene	Kolosh Formation	Iraq	A species of Cytherella.
Cytherella yezoensis^[100]	Sp. nov		Tanaka & Nishimura	Late Cretaceous (Campanian)		Japan
Cytherelloidea hetonaiensis^[100]	Sp. nov		Tanaka & Nishimura	Late Cretaceous (Campanian)		Japan
Cytherelloidea popetensis^[100]	Sp. nov		Tanaka & Nishimura	Late Cretaceous (Campanian)		Japan
Cytheretta buccheriensis^[93]	Sp. nov		Sciuto, Baldanza & Reitano	Pliocene		Italy
Cytherelloidea bractea^[90]	Sp. nov	Valid	Sheppard in Franz, Tesakova & Schweigert	Jurassic		France Germany
Cytheropteron sagirmaiensis^[101]	Sp. nov		Qadafary, Taha & Kharajiany	Paleogene	Kolosh Formation	Iraq
Eokloedenella duodepressa^[94]	Sp. nov	Valid	Zhang et al.	Ordovician	Crown Point Formation	United States ( New York)	A member of the family Leperditellidae.
Eucytherura captinconcha^[102]	Sp. nov	Valid	Forel in Forel et al.	Early Cretaceous (Valanginian and Hauterivian)		France	A member of the family Cytheruridae.
Eucytherura evae^[90]	Sp. nov	Valid	Tesakova & Franz in Franz, Tesakova & Schweigert	Jurassic		Germany
Eucytherura paucicostata^[90]	Sp. nov	Valid	Franz, Tesakova & Schweigert	Jurassic		Germany
Glyptocythere pseudotuberosa^[103]	Nom. nov	Valid	Tesakova	Middle Jurassic (Bathonian)		Germany	A replacement name for Glyptocythere tuberosa Brand & Malz (1962).
Haplocytheridea maedai^[100]	Sp. nov		Tanaka & Nishimura	Late Cretaceous (Campanian)		Japan
Hiatobairdia peggy^[104]	Sp. nov		Forel	Late Triassic (Carnian)	San Cassiano Formation	Italy
Hobetsucythereis^[100]	Gen. et sp. nov		Tanaka & Nishimura	Late Cretaceous (Campanian)		Japan	Genus includes new species H. ohtatsumei.
Hungarella aitutu^[96]	Sp. nov		Forel in Forel, McCartain & Haig	Triassic		Timor-Leste
Ilyocypris tryponata^[105]	Sp. nov		Maia et al.	Early Cretaceous (Aptian)	Codó Formation	Brazil
Judahella leii^[106]	Sp. nov	Valid	Forel et al.	Middle Triassic	Guanling Formation	China
Keijella longiundosa^[107]	Sp. nov		Sciuto in Benkhedda et al.	Miocene (Tortonian)		Algeria	A member of the family Trachyleberididae.
Khandianella^[98]	Gen. et sp. nov	Valid	Melnikova in Melnikova, Ariunchimeg & Gereltsetseg	Silurian (Llandovery)	Chargat Formation	Mongolia	The type species is K. scrobiculata.
Laterophores arrisoris^[97]	Sp. nov	Valid	Mcgairy et al.	Ordovician (Katian)	Phu Ngu Formation	Vietnam	A member of Podocopa belonging to the order Beyrichiocopida and the family Bolliidae.
Laterophores reticulatus^[97]	Sp. nov	Valid	Mcgairy et al.	Ordovician (Katian)	Phu Ngu Formation	Vietnam	A member of Podocopa belonging to the order Beyrichiocopida and the family Bolliidae.
Lophocythere? jhuranensis^[108]	Sp. nov	Valid	Kumari & Mahalakshmi in Mahalakshmi, Kumari & Muduli	Late Jurassic (Kimmeridgian)	Jhuran Formation	India	Published online in 2025, but the issue date is listed as December 2024.
Lophocythere mosaica^[109]	Sp. nov	Valid	Shurupova	Middle Jurassic (Callovian)		Russia ( Kursk Oblast)
Lophocythere tuberculata^[109]	Sp. nov	Valid	Shurupova	Middle Jurassic (Callovian)		Russia ( Kursk Oblast Ryazan Oblast)
Macrodentina jaduraensis^[108]	Sp. nov	Valid	Kumari & Mahalakshmi in Mahalakshmi, Kumari & Muduli	Late Jurassic (Kimmeridgian)	Jhuran Formation	India	Published online in 2025, but the issue date is listed as December 2024.
Microcheilinella pranskeviciusi^[89]	Nom. nov	Valid	Guillam & Hambardzumyan	Silurian		Lithuania	A replacement name for Microcheilinella angusta Pranskevičius (1971).
Mongolocypris shai^[110]	Sp. nov	Valid	Wang	Early Cretaceous	Xiaonangou Formation	China
Nekrocypris^[102]	Gen. et sp. nov	Valid	Forel in Forel et al.	Early Cretaceous (Hauterivian)		France	A member of the family Pontocyprididae. The type species is N. sepultinconcha.
Neurocythere margaritae^[111]	Sp. nov	Valid	Tesakova	Middle Jurassic (Callovian)		Russia
Neurocythere parva^[111]	Sp. nov	Valid	Tesakova	Middle Jurassic (Callovian)		Russia
Okadaleberis tafnaensis^[107]	Sp. nov		Sciuto in Benkhedda et al.	Miocene (Tortonian)		Algeria	A member of the family Trachyleberididae.
Ordovizona? constricta^[97]	Sp. nov	Valid	Mcgairy et al.	Ordovician (Katian)	Phu Ngu Formation	Vietnam	A member of Podocopa belonging to the order Beyrichiocopida and the family Ordovizonidae.
Pacambocythere ishizakii^[88]	Sp. nov	Valid	Irizuki in Irizuki et al.	Miocene	Yoshino Formation	Japan	A member of the family Trachyleberididae.
Paleodarwinula gregorysohni^[112]	Sp. nov		Bergue et al.	Permian	Rio do Rasto Formation	Brazil
Paleodarwinula moliyae^[112]	Sp. nov		Bergue et al.	Permian	Rio do Rasto Formation	Brazil
Paracypris jambourensis^[87]	Sp. nov	Valid	Sadeeq & Aziz	Paleogene	Aaliji Formation	Iraq
Paracypris koloshiensis^[101]	Sp. nov		Qadafary, Taha & Kharajiany	Paleogene	Kolosh Formation	Iraq
Patellacythere lineata^[108]	Sp. nov	Valid	Kumari & Mahalakshmi in Mahalakshmi, Kumari & Muduli	Late Jurassic (Kimmeridgian)	Jhuran Formation	India	Published online in 2025, but the issue date is listed as December 2024.
Pattersoncypris inflata^[105]	Sp. nov		Maia et al.	Early Cretaceous (Aptian)	Codó Formation	Brazil
Pattersoncypris labiata^[113]	Sp. nov		Maia et al.	Cretaceous			A member of the family Cyprididae.
Perissocytheridea (Kroemmelbeinella) hiblaea^[93]	Sp. nov		Sciuto, Baldanza & Reitano	Pliocene		Italy
Polycope fischeri^[90]	Sp. nov	Valid	Franz, Tesakova & Schweigert	Jurassic		Germany
Polycope latitudialis^[95]	Sp. nov		Mette & Moser	Middle Triassic (Ladinian)	Reifling Formation	Austria	A member of Halocyprida belonging to the family Polycopidae.
Polycope marginoplanata^[95]	Sp. nov		Mette & Moser	Middle Triassic (Ladinian)	Reifling Formation	Austria	A member of Halocyprida belonging to the family Polycopidae.
Polycope marginotorata^[95]	Sp. nov		Mette & Moser	Middle Triassic (Ladinian)	Reifling Formation	Austria	A member of Halocyprida belonging to the family Polycopidae.
Pontopolycope reiflingia^[95]	Sp. nov		Mette & Moser	Middle Triassic (Ladinian)	Reifling Formation	Austria	A member of Halocyprida belonging to the family Polycopidae.
Procytherura ? striata^[90]	Sp. nov	Valid	Franz, Tesakova & Schweigert	Jurassic		Germany
Reconcavona grandiensis^[114]	Comb. nov	Valid	(Tomé, Lima Filho & Neumann)	Early Cretaceous	Araripe Basin	Brazil	A member of the family Paracyprididae; moved from Damonella grandiensis Tomé, Lima Filho & Neumann (2014).
Tenedocythere forticostata^[93]	Sp. nov		Sciuto, Baldanza & Reitano	Pliocene		Italy
Terquemula pseudoflexicosta^[111]	Sp. nov	Valid	Tesakova	Middle Jurassic (Callovian)		Russia
Triadohealdia cribasensis^[96]	Sp. nov		Forel in Forel, McCartain & Haig	Triassic		Timor-Leste
Triadohealdia manatuto^[96]	Sp. nov		Forel in Forel, McCartain & Haig	Triassic		Timor-Leste
Urobairdia umbonata^[95]	Sp. nov		Mette & Moser	Middle Triassic (Ladinian)	Reifling Formation	Austria	A member of Podocopida belonging to the family Bairdiidae.
Verrucocythereis verrucomurata^[93]	Sp. nov		Sciuto, Baldanza & Reitano	Pliocene		Italy
Vesticytherura curticostata^[90]	Sp. nov	Valid	Franz, Tesakova & Schweigert	Jurassic		Germany
Vesticytherura intermedia^[90]	Sp. nov	Valid	Franz, Tesakova & Schweigert	Jurassic		Germany
Vesticytherura interpumicosa^[90]	Sp. nov	Valid	Franz, Tesakova & Schweigert	Jurassic		Germany
Vesticytherura rectangulata^[90]	Sp. nov	Valid	Tesakova & Franz in Franz, Tesakova & Schweigert	Jurassic		Germany
Vesticytherura schweizeri^[90]	Sp. nov	Valid	Franz, Tesakova & Schweigert	Jurassic		Germany
Vogdesella longidorsa^[94]	Sp. nov	Valid	Zhang et al.	Ordovician	Crown Point Formation	United States ( New York)	A member of the family Circulinidae.
Woodeltia sorapuchiensis^[115]	Sp. nov	Valid	Mukai & Tanaka	Pliocene	Takikawa Formation	Japan	The type species of the genus Woodeltia (also including extant species "Celtia" japonica Ishizaki, 1981, "Celtia" blizhnii Brouwers, 1993, "Celtia" palmensis Brouwers, 1993 and "Celtia" pointmanbiensis Brouwers, 1993).
Woodeltia subreticulata^[115]	Comb. nov	Valid	(Irizuki & Yamada in Irizuki et al.)	Miocene		Japan	Moved from "Celtia" subreticulata Irizuki & Yamada in Irizuki et al. (2004).
Zonocypris goyi^[116]	Sp. nov		Díez-Somolinos et al.	Early Cretaceous (Barremian)		Spain

Ostracod research

Evidence from the study of Silurian ostracod assemblages from the eastern Baltic Basin (Lithuania), indicating that the mid-Homerian biotic turnover event most likely lasted approximately 260,000 years (and thus was shorter than indicated by earlier estimates), is presented by Rinkevičiūtė et al. (2025).^[117]
Forel et al. (2025) study the composition of the Late Jurassic ostracod assemblages from the Sahune site (France), interpreting representatives of Pontocyprididae as members of deep-sea ostracod communities at least from the Oxfordian to the Early Cretaceous, and providing new information on the morphology of Procytherura? praecoquum.^[118]
Lim (2025) studies the diversification dynamics of Cyprideidae through time, and interprets the fossil record of the group as indicating that the family underwent evolutionary radiation during the Jurassic-Cretaceous transition, regardless of possible taxonomic inflation of members of the group.^[119]
Wang et al. (2025) revise the ostracod fauna from the Upper Cretaceous Liwaxia and Madongshan formations (China), correlate it with contemporaneous ostracod faunas from China and Mongolia, and assign the genus Liupanshania to the subfamily Cyproidinae in the family Notodromadidae.^[120]
A study on routes and mechanisms of dispersal of non-marine ostracods belonging to the subfamily Talicyprideinae during the Campanian–Maastrichtian is published by Gobbo & Bertini (2025).^[121]
Patarroyo et al. (2025) study two ostracod assemblages from the Maastrichtian strata of the Colón Formation (Colombia), and interpret the differences in their composition as resulting from an environmental shift during the latest Cretaceous.^[122]
A study on the composition and biogeographical connections of ostracod assemblages from the Paleocene-Eocene sedimentary succession at Wadi Tarfa (Egypt) is published by Samir et al. (2025).^[123]

Thecostracans

Name	Novelty	Status	Authors	Age	Type locality	Country	Notes
Alabamalepas^[124]	Gen. et sp. nov	Valid	Perreault, Collareta & Buckeridge	Oligocene		United States ( Alabama South Carolina)	A barnacle belonging to the family Platylepadidae. Genus includes new species A. cookei.
Amphibalanus itoigawai^[125]	Sp. nov	Valid	Karasawa & Kobayashi	Early-Middle Miocene (Burdigalian)-(Langhian)	Toyama Formation, Iwamura Groupp; Akeyo and Oidawara formations, Mizunami Group	Japan	A member of the family Balanidae.
Bognorscalpellum^[126]	Gen. et comb. nov	Valid	Gale	Eocene		United Kingdom	A barnacle. The type species is "Mitella" venablesi Withers (1953); genus also includes "Mitella" daviesi Withers (1953).
Lacrymascalpellum^[126]	Gen. et comb. nov	Valid	Gale	Miocene to Pleistocene		Austria Czech Republic France Italy Switzerland United Kingdom	A barnacle. The type species is "Scalpellum" burdigalense Des Moulins (1875); genus also includes "Scalpellum" magnum Darwin (1851), "Scalpellum" dalpiazi Withers (1953), "Scalpellum" molinianum Seguenza (1876), "Scalpellum" lovisatoi De Alessandri (1895), "Scalpellum" studeri Tièche (1905), "Scalpellum" moraviense Withers (1953) and "Scalpellum" sigmoideum Withers (1953).
Laeviscalpellum^[126]	Gen. et comb. nov	Valid	Gale	Cretaceous		United Kingdom United States	A barnacle. The type species is "Virgiscalpellum" laevis Gale (2020); genus also includes "Virgiscalpellum" rugosum Gale (2020).
Lepas tanakai^[125]	Sp. nov	Valid	Karasawa & Kobayashi	Early Miocene (Burdigalian)	Akeyo Formation, Mizunami Group	Japan	A member of the family Lepadidae.
Megabalanus yamaguchii^[125]	Sp. nov	Valid	Karasawa & Kobayashi	Early-Middle Miocene (Burdigalian)- (Langhian)	Akeyo and Oidawara formations, Mizunami Group	Japan	A member of the family Balanidae.
Membranobalanus distortus^[127]	Sp. nov	Valid	Gale & Sadorf	Pliocene (Piacenzian)	Yorktown Formation	United States ( North Carolina)	A member of the family Balanidae.
Proverruca cenomanica^[126]	Sp. nov	Valid	Gale	Late Cretaceous		United Kingdom	A barnacle.
Proverruca minuta^[126]	Sp. nov	Valid	Gale			United Kingdom	A barnacle.
Proverruca ornata^[128]	Sp. nov	Valid	Gale & Jagt	Late Cretaceous (Campanian)	Gulpen Formation	Belgium	A barnacle.
Solidobalanus hataii^[125]	Sp. nov	Valid	Karasawa & Kobayashi	Early-Middle Miocene (Burdigalian)-(Langhian)	Akeyo and Oidawara formations, Mizunami Group	Japan	A member of the family Balanidae.
Solidoscalpellum^[126]	Gen. et comb. nov	Valid	Gale	Cretaceous		Kazakhstan United Kingdom	A scalpellid barnacle. The type species is "Scalpellum maximum" var. cylindraceum Darwin (1851); genus also includes "Arcoscalpellum maximum" var. triminghamensis Withers (1935) and "Cretiscalpellum" sharapovi Alekseev (2009).
Striascalpellum harnhamensis^[126]	Sp. nov	Valid	Gale			United Kingdom	A barnacle.
Tetraclitella mizunamiensis^[125]	Sp. nov	Valid	Karasawa & Kobayashi	Early Miocene (Burdigalian)	Akeyo Formation, Mizunami Group	Japan	A member of the family Tetraclitidae.
Tetraclitella tokiensis^[125]	Sp. nov	Valid	Karasawa & Kobayashi	Early Miocene (Burdigalian)	Akeyo Formation, Mizunami Group	Japan	A member of the family Tetraclitidae.
Tetrinis schooni^[129]	Sp. nov		Buckeridge & Smith	Early Cretaceous (Albian)	Allaru Formation	Australia	A barnacle belonging to the group Scalpellomorpha and the family Zeugmatolepadidae.
Titanolepas curvatus^[126]	Sp. nov	Valid	Gale			United Kingdom	A barnacle.
Virgilepas angulosum^[126]	Sp. nov	Valid	Gale			United Kingdom	A barnacle.
Virgiscalpellum brydonei^[126]	Sp. nov	Valid	Gale			United Kingdom	A barnacle.

Thecostracan research

Bojarski, Cierocka & Szwedo (2025) report the discovery of nine inclusions of balanomorph barnacles in the Miocene Mexican amber.^[130]
Gale & Sadorf (2025) report the discovery of fossil material of Verruca stroemia from the Pliocene strata of the Yorktown Formation (North Carolina, United States), and interpret purported extinct species V. alaskana and V. koikei as junior synonyms of V. stroemia.^[131]

Other crustaceans

Name	Novelty	Status	Authors	Age	Type locality	Country	Notes
Halicyne tanaitica^[132]	Sp. nov	Valid	Mychko	Early Triassic (Olenekian)	Lipovskaya Formation	Russia ( Volgograd Oblast)	A member of Cyclida.
Missouriclus^[133]	Gen. et comb. nov		Schweitzer, Mychko & Lehnert	Carboniferous (Kasimovian)	Iola Formation	United States ( Missouri)	A member of Cyclida. Genus includes "Cyclus" communis Rogers (1902).
Norestheria franconica^[134]	Sp. nov	Valid	Geyer & Sell	Late Triassic (Carnian)	Hassberge Formation	Germany	A clam shrimp.
Ohioclus^[133]	Gen. et comb. nov		Schweitzer, Mychko & Lehnert	Carboniferous (Kasimovian)		United States ( Ohio)	A member of Cyclida. Genus includes O. columbianensis.
Oonocarcinus uralicus^[135]	Sp. nov	Valid	Mychko, Alekseev & Schweitzer	Carboniferous (Gzhelian)–Permian (Asselian)		Russia ( Perm Krai)	A member of Cyclida.
Palaeolimnadia stevenbeckeri^[136]	Sp. nov	Valid	Poschmann et al.	Devonian (Emsian)	Klerf Formation	Luxembourg	A clam shrimp belonging to the family Paleolimnadiidae.
Pavelskine^[133]	Gen. et comb. nov		Schweitzer, Mychko & Lehnert	Carboniferous (Kasimovian)	Iola Formation	United States ( Missouri)	A member of Cyclida. Genus includes "Cyclus" packardi Rogers (1902).
Planamandibulus^[137]	Gen. et sp. nov	Valid	Reynolds et al.	Cambrian Stage 10	Windfall Formation	United States ( Nevada)	A member of Phosphatocopida belonging to the family Cyclotronidae. The type species is P. nevadensis.
Polygrapta dazuensis^[138]	Comb. nov		(Chen)	Late Triassic	Xujiahe Formation	China	A clam shrimp belonging to the family Polygraptidae; moved from Euestheria dazuensis Chen (1974)
Polygrapta yipinglangensis^[138]	Comb. nov	Valid	(Chen)	Late Triassic	Ganghaizi Formation	China	A clam shrimp belonging to the family Polygraptidae; moved from Euestheria yipinglangensis Chen (1974)
Uralocyclus feldmanni^[135]	Sp. nov	Valid	Mychko, Alekseev & Schweitzer	Carboniferous (Viséan or Serpukhovian)		Russia ( Chelyabinsk Oblast)	A member of Cyclida.
Weichangiops squamosus^[139]	Sp. nov		Wang, Ren & Zhao	Early Cretaceous	Yixian Formation	China	A notostracan.
Yunnanocyclus fortis^[140]	Sp. nov		Sun et al.	Early Triassic (Induan)		China	A member of Cyclida.

Other crustacean research

Bicknell et al. (2025) describe an assemblage of 50 specimens of Schramine montanaensis from the Carboniferous Bear Gulch Limestone (Montana, United States), representing one of oldest records of gregarious behavior of crustaceans reported to date.^[141]

Insects

Radiodonts

Name	Novelty	Status	Authors	Age	Type locality	Country	Notes	Images
Falciscaris^[142]	Gen. et sp. nov	Valid	Potin et al.	Cambrian (Jiangshanian) to Ordovician (Tremadocian)	Fezouata Formation	China Morocco	A member of the family Hurdiidae. The type species is F. mumakiana.
Mosura^[143]	Gen. et sp. nov	Valid	Moysiuk and Caron	Cambrian (Wuliuan)	Burgess Shale	Canada ( British Columbia)	A member of the family Hurdiidae, likely sister to all other genera within the clade. The type species is M. fentoni.

Radiodont research

Evidence from the study of new fossil material of Caryosyntrips from the Cambrian strata of the Hongjiangshao Formation (China) and Spence Shale (Utah, United States), interpreted as indicating that characters used to diagnose species belonging to this genus might instead reflect variation within the same species, is presented by Yang et al. (2025).^[144]
Luo et al. (2025) describe fossil material of Ursulinacaris cf. U. grallae from the Miaolingian strata of the Kaili Formation (China), expanding known geographical range of members of the genus Ursulinacaris.^[145]

Trilobites

Name	Novelty	Status	Authors	Age	Type locality	Country	Notes
Albertella nebeli^[146]	Sp. nov	Valid	Sundberg et al.	Cambrian		United States
Amphoton bicknelli^[147]	Sp. nov	Valid	Smith et al.	Cambrian (Miaolingian)	Tasman Formation	New Zealand	A member of the family Dolichometopidae.
Atops antiatlasensis^[148]	Sp. nov		Geyer & Landing	Cambrian		Morocco
"Balticoglaucus" avalonensis^[149]	Sp. nov	Valid	Westrop & Landing	Cambrian (Drumian)	Manuels River Formation	Canada ( New Brunswick)	A member of the family Solenopleuridae.
Batocara tuberosus^[150]	Sp. nov	Valid	Wei et al.	Ordovician-Silurian transition		China
Bergeronites leishuae^[151]	Sp. nov		Peng et al.	Cambrian (Guzhangian)	Longha Formation	China	A member of the family Damesellidae.
Catillicephalites? ambiguus^[152]	Sp. nov	Valid	Westrop & Dengler	Cambrian		Canada
Ciliscutellum rhaxerosides^[150]	Sp. nov	Valid	Wei et al.	Ordovician-Silurian transition		China
Cummingella europa^[153]	Sp. nov	Valid	Müller	Carboniferous (Viséan)	Heiligenhaus Formation	Germany	A member of the family Phillipsiidae.
Cummingella pauli^[153]	Sp. nov	Valid	Müller	Carboniferous (Viséan)	Heiligenhaus Formation	Germany	A member of the family Phillipsiidae.
Cyphaspis hauptigi^[154]	Sp. nov	Valid	Van Viersen & Bohatý	Devonian (Frasnian)	Oos Formation	Germany	A member of the family Aulacopleuridae.
Cyrtosymboloides koenigshofi^[155]	Sp. nov	Valid	Flick	Devonian	Hermershausen Limestone	Germany
Delocare diadema grimbiemontense^[156]	Ssp. nov	Valid	Van Viersen	Devonian (Emsian)		Belgium
Dinea^[152]	Gen. et sp. nov	Valid	Westrop & Dengler	Cambrian (Drumian)		Canada	A probable member of the family Asaphiscidae. Genus includes new species D. bulla.
Gangchengia^[157]	Gen. et sp. nov		Ren et al.	Cambrian (Drumian)	Changhia Formation	China	A dameselloid trilobite. Genus includes new species G. subcylindrica.
Ibexocephala^[158]	Gen. et 2 sp. nov	Valid	Adrain	Ordovician (Tremadocian)	Garden City Formation	United States ( Idaho)	A member of the family Bathyuridae. The type species is I. lossoae; genus also includes I. dekosterae from the Fillmore Formation (Utah, United States).
Imighzeria^[148]	Gen. et sp. nov		Geyer & Landing	Cambrian		Morocco	Genus includes new species I. silena.
Janusiproetus^[159]	Gen. et comb. et ssp. nov	Valid	Basse & Müller	Devonian		Germany	A member of the family Tropidocoryphidae. Genus includes "Cornuproetus (Quadratoproetus)" maureri Alberti (1967), including new subspecies Janusiproetus maureri guenterodatilis.
"Jincella" arenata^[149]	Sp. nov	Valid	Westrop & Landing	Cambrian (Drumian)	Manuels River Formation	Canada ( New Brunswick)	A member of the family Solenopleuridae.
Kayseraspis rugosa^[160]	Sp. nov	Valid	Ghobadi Pour	Ordovician (Tremadocian)		Iran
Kettneraspis dickinsoni^[161]	Sp. nov	Valid	Van Viersen, Lerouge & Kesselaer	Devonian (Pragian)	Ihandar Formation	Morocco	A member of the family Odontopleuridae.
Kootenia barensis^[146]	Sp. nov	Valid	Sundberg et al.	Cambrian		United States
Leonaspis burketti^[161]	Sp. nov	Valid	Van Viersen, Lerouge & Kesselaer	Devonian (Pragian)	Ihandar Formation	Morocco	A member of the family Odontopleuridae.
Leonaspis chancellori^[161]	Sp. nov	Valid	Van Viersen, Lerouge & Kesselaer	Devonian (Pragian)	Ihandar Formation	Morocco	A member of the family Odontopleuridae.
Licnocephala bradleyi^[158]	Sp. nov	Valid	Adrain	Ordovician (Tremadocian)	Garden City Formation	United States ( Idaho)	A member of the family Bathyuridae.
Licnocephala ngi^[158]	Sp. nov	Valid	Adrain	Ordovician (Tremadocian)	Garden City Formation	United States ( Idaho)	A member of the family Bathyuridae.
Lorrettina diemenensis^[162]	Sp. nov	Valid	Laurie, Jago & Bischoff	Cambrian (Furongian)		Australia
Maladioidella spinosa^[162]	Sp. nov	Valid	Laurie, Jago & Bischoff	Cambrian (Furongian)		Australia
Mansuyites vivianensis^[162]	Sp. nov	Valid	Laurie, Jago & Bischoff	Cambrian (Furongian)		Australia
Meadowtownella yunnanensis^[150]	Sp. nov	Valid	Wei et al.	Ordovician-Silurian transition		China
Neoacrocephalina^[162]	Gen. et sp. nov	Valid	Laurie, Jago & Bischoff	Cambrian (Furongian)		Australia	Genus includes new species N. banksi.
Neogriffithides artamonovorum^[163]	Sp. nov	Valid	Mychko	Permian (Wuchiapingian)		Russia ( Primorsky Krai)
Novoriocephalus^[162]	Gen. et sp. nov	Valid	Laurie, Jago & Bischoff	Cambrian (Furongian)		Australia	Genus includes new species N. lagoonensis.
Onaraspis schmitzi^[164]	Sp. nov		Sepúlveda et al.	Cambrian	Daroca Formation	Spain	A member of the family Bathynotidae.
Onchonotellus arealis^[165]	Sp. nov	Valid	Makarova et al.	Cambrian		Russia
Onchonotopsis formosa^[152]	Sp. nov	Valid	Westrop & Dengler	Cambrian		Canada
Osceolia tumerispina^[166]	Sp. nov	Valid	Srivastava-Losey & Hughes	Cambrian	St. Lawrence Formation	United States ( Wisconsin)	A member of the family Dikelocephalidae.
Pachimocaspis^[167]	Sp. nov	Valid	Rustán et al.	Silurian-Devonian transition		Argentina Bolivia	A dalmanitid trilobite. Genus includes new species P. pachimocensis.
Paraphillipsia urushtensis^[168]	Sp. nov	Valid	Mychko	Permian (Changhsingian)	Belalabino Group	Russia ( Krasnodar Krai)	A member of the family Phillipsiidae.
Parasolenopleura siberica^[165]	Sp. nov	Valid	Makarova et al.	Cambrian		Russia
Paulaspis schmidtthomei^[164]	Sp. nov		Sepúlveda et al.	Cambrian	Huérmeda Formation	Spain	A member of the family Bathynotidae.
Piriproetus ornatissimus nictans^[155]	Ssp. nov	Valid	Flick	Devonian	Hermershausen Limestone	Germany
Politicurus edwardsi^[169]	Sp. nov	Valid	Ng, Bradley & Adrain in Adrain et al.	Ordovician (Tremadocian)	House Limestone	United States ( Utah)	A member of the family Hystricuridae.
Praepatokephalus housensis^[169]	Sp. nov	Valid	Adrain & Pérez-Peris in Adrain et al.	Ordovician (Tremadocian)	House Limestone	United States ( Utah)	A member of the family Remopleurididae.
Pseudanomocarina falcata^[165]	Sp. nov	Valid	Makarova et al.	Cambrian		Russia
Pseudokotuia^[170]	Gen. et sp. nov		Ren et al.	Cambrian (Paibian)	Chaumitien Formation	China	A member of the family Anomocaridae. Genus includes new species P. quadrata.
Ptychopleurites myrowi^[171]	Sp. nov	Valid	Taylor, Strauss & Repetski	Cambrian	Jones Ridge Limestone	United States ( Alaska)
Sinoencrinurus^[150]	Gen. et comb. nov	Valid	Wei et al.	Ordovician-Silurian transition	Lianfeng Formation	China	The type species is "Encrinuroides" zhenxiongensis Sheng (1964); genus also includes "Niuchangella" meitanensis Zhang (1974), "Encrinuroides" yanheensis Yin in Yin & Lee (1978), "Encrinuroides" yichangensis Yi (1978) and "Encrinuroides" yinjiangensis Zhang (1974).
Skullrockicurus^[169]	Gen. et sp. nov	Valid	Losso & Adrain in Adrain et al.	Ordovician (Tremadocian)	House Limestone	United States ( Utah)	A member of the family Dimeropygidae. The type species is S. plummeri.
Solenoparia bensoni^[147]	Sp. nov	Valid	Smith et al.	Cambrian (Miaolingian)	Tasman Formation	New Zealand	A member of the family Solenopleuridae.
Symphysurina ripperdani^[171]	Sp. nov	Valid	Taylor, Strauss & Repetski	Cambrian	Jones Ridge Limestone	United States ( Alaska)
Tasmanosaukia^[162]	Gen. et sp. nov	Valid	Laurie, Jago & Bischoff	Cambrian (Furongian)		Australia	Genus includes new species T. pulchra.
Toxotiformis tchopkiensis^[165]	Sp. nov	Valid	Makarova et al.	Cambrian		Russia
Vicnepea bentleyi^[147]	Sp. nov	Valid	Smith et al.	Cambrian (Miaolingian)	Tasman Formation	New Zealand	A member of the family Nepeidae.
?Wuhuia turuaensis^[162]	Sp. nov	Valid	Laurie, Jago & Bischoff	Cambrian (Furongian)		Australia
Yunnanoproetus^[150]	Gen. et sp. nov	Valid	Wei et al.	Ordovician-Silurian transition		China	The type species is Y. shanshuensis.

Trilobite research

Evidence of impact of changes in marine redox on the evolution of body size of Cambrian and Ordovician trilobites is presented by Sun et al. (2025).^[172]
Balseiro, Serra & Bignon (2025) identify extinction as the main driver of expansion and contraction of morphological diversity of trilobites from Cambrian to Devonian.^[173]
Dai, Zhang & Peng (2025) present essentially complete post-embryonic growth series of Maotunia iddingsi on the basis of fossils from the Cambrian (Drumian) Zhangxia Formation (Shandong, China).^[174]
A study on the phylogenetic relationships of cyclopygid trilobites is published by Braddy, Dale & Wang (2025).^[175]
Gómez-Rodríguez, López-Pachón & Esteve (2025) argue that the body shape of raphiophorid trilobites prevented them from being moved from the seafloor by water currents, that the spine projecting from the anterior part of the glabella of these trilobites had no hydrodynamic function and that this spine was likely a sensory organ.^[176]
Revision of the family Olenidae is published by Monti (2025).^[177]
Crônier, Couette & Laffont (2025) compare the utility of 2D and 3D quantitative analyses for the studies of morphological diversity of phacopid trilobites.^[178]
Redescription of Laneites ingricus and Ceraurinella ornata and a review of cheirurine occurrences across Baltoscandia is published by Ebbestad et al. (2025).^[179]
Zabini et al. (2025) identify fossil material of Mucronaspis sp. from the Ordovician Iapó Formation, representing the oldest record of a trilobite from Brazil reported to date.^[180]
A study on the modular organization of the trilobite head, as indicated by data from specimens of Ceraurus pleurexanthemus from the Ordovician (Sandbian) Glens Falls Limestone (New York, United States), is published by Vargas-Parra & Hopkins (2025).^[181]
A study on the phylogenetic relationships of members of the family Phillipsiidae is published by Brezinski (2025).^[182]
Feist & Morzadec (2025) revise "Lichas" kerfornei from the Pragian Saint Céneré Formation (Brittany, France), and assign it to the genus Branikarges.^[183]
Fossil material of Platyscutellum massai and Cavetia furcifera interpreted as indicating that the studied trilobites assembled in vent cavities in large groups, likely during synchronized moulting events, is described from the Devonian strata in Morocco by Belka et al. (2025).^[184]
Nikolic, Warnock & Hopkins (2025) evaluate the utility of inclusion of both fossils with morphological data and ones only with taxonomic constraints and data on age but without morphological data in the analyses aiming to recover dated phylogeny of extinct taxa, testing their combined approach on trilobites from the group Aulacopleurida, and argue that a combined analysis outperforms analyses that only include taxa scored into a morphological matrix.^[185]
Wright & Hopkins (2025) experiment with a morphological dataset of olenid trilobites to determine impact of assumptions about morphological evolution reflected in different character model configurations on phylogenetic analyses based on fossil data and on inferences about macroevolution derived from those analyses.^[186]
A study on the phylogenetic relationships of Devonian members of Proetida is published by Jordan-Burmeister (2025).^[187]

Other arthropods

Name	Novelty	Status	Authors	Age	Type locality	Country	Notes
Ammagnostus minutus^[165]	Sp. nov	Valid	Makarova et al.	Cambrian		Russia	A member of Agnostida.
Aspidagnostus baoi^[188]	Sp. nov		Bentley & Jago	Cambrian (Guzhangian)		Australia	A member of Agnostida.
Austroxandarella^[189]	Gen. et sp. nov	Valid	Edgecombe, García-Bellido & Paterson	Cambrian Stage 4	Emu Bay Shale	Australia	A member of Xandarellida. The type species is A. poikar.
?Cotalagnostus novaezealandiae^[147]	Sp. nov	Valid	Smith et al.	Cambrian (Miaolingian)	Tasman Formation	New Zealand	A member of Agnostida belonging to the family Spinagnostidae.
Dabashanella? lunaiformis^[190]	Sp. nov	Valid	Peel	Cambrian (Wuliuan)	Henson Gletscher Formation	Greenland	A member of Phosphatocopida belonging to the family Dabashanellidae.
Dollocaris toarcica^[191]	Sp. nov	Valid	Gerbe, Hyžný & Schlögl	Early Jurassic (Toarcian)	Krempachy Marl Formation	Slovakia	A thylacocephalan.
Hypagnostus porterensis^[149]	Sp. nov	Valid	Westrop & Landing	Cambrian (Drumian)	Manuels River Formation	Canada ( New Brunswick)	A member of Agnostida.
Keurbos^[192]	Gen. et sp. nov	Valid	Gabbott et al.	Ordovician (Hirnantian)	Soom Shale (Cedarberg Formation)	South Africa	An enigmatic euarthropod, the type species is K. susanae.
Laeviglyphiulus^[193]	Gen. et sp. nov	Valid	Wesener & Rühr	Cretaceous	Kachin amber	Myanmar	A millipede belonging to the family Cambalopsidae. The type species is L. patrickmuelleri.
Liangshanella? qassutit^[190]	Sp. nov	Valid	Peel	Cambrian (Wuliuan)	Henson Gletscher Formation	Greenland	A member of Bradoriida belonging to the family Svealutidae.
Oura^[194]	Gen. et sp. nov	Valid	O'Flynn, Williams & Liu	Cambrian Series 2, Stage 3	Chengjiang Konservat-Lagerstätte (Yu'anshan Formation)	China	A deuteropod, the type species is O. megale.
Papiliomaris^[195]	Gen. et sp. nov	Valid	Anderson et al.	Silurian (Telychian)	Waukesha Biota (Brandon Bridge Formation)	United States ( Wisconsin)	A bivalved arthropod of uncertain affinities. The type species is P. kluessendorfae.
Protosiphonorhinus^[196]	Gen. et sp. nov	Valid	Moritz, Wipfler & Wesener	Cretaceous (Albian-Cenomanian)	Kachin amber	Myanmar	A millipede belonging to the family Siphonorhinidae. The type species is P. patrickmuelleri.
Pseudagnostus powenaensis^[162]	Sp. nov	Valid	Laurie, Jago & Bischoff	Cambrian (Furongian)		Australia	A member of Agnostida.
Tafilocaris^[197]	Gen. et sp. nov		García-Bellido & Gutiérrez-Marco	Ordovician (Sandbian)	First Bani Group	Morocco	A member of Nektaspida belonging to the family Emucarididae. The type species is T. ordovicica.
Tardisia^[198]	Gen. et sp. nov	Valid	McCoy et al.	Upper Carboniferous (Moscovian)	Mazon Creek fossil beds	United States ( Illinois)	A probable late surviving member of the Vicissicaudata within Artiopoda. The type species is T. broedeae
Tasagnostus simpsoni^[147]	Sp. nov	Valid	Smith et al.	Cambrian (Miaolingian)	Tasman Formation	New Zealand	A member of Agnostida belonging to the family Diplagnostidae.
Toledodiscus^[199]	Gen. et sp. nov		Collantes & Pereira	Cambrian Stage 4	Soleras Formation	Spain	A member of Agnostida belonging to the family Weymouthiidae. The type species is T. valverdi.
Tuzoia isuelaensis^[200]	Sp. nov		Izquierdo-López et al.	Cambrian		Spain
Zazrivacaris^[191]	Gen. et sp. nov	Valid	Gerbe, Hyžný & Schlögl	Early Jurassic (Toarcian)	Krempachy Marl Formation	Slovakia	A thylacocephalan. The type species is Z. jodorowskyi.

Collantes & Pates (2025) revise the holotype of Isoxys carbonelli and confirm placement of this species within the genus Isoxys.^[201]
Nielsen et al. (2025) study changes of elongated cardinal spines of Isoxys volucris during its ontogeny, and argue that the studied spines had a primary defensive function.^[202]
Chen, Lian & Wang (2025) describe fossil material of Houlongdongella disulcata and Houlongdongella elevata from the Cambrian Shuijingtuo Formation (Hubei, China), extending known geographical range of both taxa.^[203]
Haridy et al. (2025) identify purported early vertebrate Anatolepis as an arthropod, and interpret its purported dentine tubules as sensory structures similar to those present in Cambrian aglaspidids and modern arthropods.^[204]
A study on the morphology of cephalic appendages of Acanthomeridion serratum, providing evidence of probable adaptations to durophagy, is published by Wu et al. (2025).^[205]
Evidence of the presence of two pairs of different compound eyes in Pygmaclypeatus daziensis (a pair of stalked, movable eyes and a pair of sessile dorsal eyes) is presented by Schmidt et al. (2025).^[206]
O'Flynn et al. (2025) describe new fossil material of Kuamaia lata from the Cambrian Chiungchussu Formation (China), providing new information on the frontal appendages and number of head segments in members of this species, and interpret the studied fossils as indicating that raptorial frontal appendages, ancestral for Euarthropoda but lost in Artiopoda, evolved secondarily within the artiopod lineage that included K. lata.^[207]
Redescription and a study on the affinities of Helmetia expansa is published by Losso, Caron & Ortega-Hernández (2025).^[208]
Bicknell et al. (2025) describe fossil material of Naraoia cf. bertiensis from the Silurian (Přídolí) Phelps Member of the Fiddlers Green Formation (Bertie Group; New York, United States), expanding known geographical range of the youngest naraoiids.^[209]
Naimark & Chaika (2025) study the structure of the cuticles of members of Agnostina, reporting evidence of greater similarity to cuticles of chelicerates than those of crustaceans.^[210]
Liu et al. (2025) present new information on the morphology of Primicaris, interpreted as supporting a stem-group mandibulate affinity for marrellomorphs.^[211]
Fossil material of Euthycarcinus cf. martensi representing the first known record of a member of Euthycarcinoidea from the Carboniferous-Permian strata of the Saar–Nahe Basin is described from the Remigiusberg Formation (Germany) by Poschmann et al. (2025).^[212]
Brookfield, Catlos & Garza (2025) argue that the strata of the Stonehaven Group (United Kingdom) preserving fossil material of Pneumodesmus newmani is most likely Přídolí–Lochkovian in age.^[213]
Dernov (2025) describes impressions of probable paratergites of Arthropleura sp. from the Carboniferous (Bashkirian) Mospyne Formation (Ukraine), possibly representing fossil material of juvenile specimens, and argues that juvenile and adult arthropleurids might have lived in different habitats.^[214]
A study on the anatomy of Protosilvestria sculpta, based on data from specimens from the Quercy Phosphorites Formation and a new specimen from the Oligocene strata in the Montpellier region (France), is published by Charrondière et al. (2025).^[215]
Laville et al. (2025) provide new information on the anatomy of Dollocaris ingens, and interpret thylacocephalans as the sister group of Malacostraca within Pancrustacea.^[216]
Strausfeld et al. (2025) provide new information on the anatomy of visual systems and brain Jianfengia multisegmentalis, including information on its structured eyestalks and compound eyes, and study the phylogenetic affinities of Jianfengia, interpreting it as unrelated to short-bodied "great appendage" leanchoiliids (recovered as the sister taxon of the total group of Chelicerata) and representing a sister taxon of the total group of Mandibulata.^[217]

General research

Chipman (2025) proposes a new model for the evolution of arthropod tagmata based on data from extant and fossil arthropods.^[218]
Lindgren et al. (2025) study the fossilization process of arthropod compound eyes on the basis of data from Cretaceous crab fossils from Weno and Pawpaw formations (Texas, United States) and extant sesarmid crabs, providing evidence that fossilization can change the original composition of the studied structures and their physicochemical properties.^[219]
Scratch marks assigned to the ichnotaxon Monomorphichnus, representing the oldest fossil evidence of arthropods (possibly trilobites) in the Cambrian sedimentary series of Normandy (France) reported to date are described from the Terreneuvian strata from the Rozel Cape by Charrondière, Néraudeau & Gendry (2025).^[220]
Westrop & Landing (2025) revise the composition of the assemblage of middle Cambrian trilobites and agnostids from the MacLean Brook Group (Cape Breton Island, Nova Scotia, Canada).^[221]
Naimark & Sizov (2025) study the taphonomy of the Cambrian arthropod fossils from the Kimiltei site (Irkutsk Oblast, Russia) first reported by Naimark, Sizov & Khubanov (2023),^[222] and argue that the identification of putative members of Offacolidae and Chasmataspidida from this locality as chelicerates is correct.^[223]
Probable burrows of arthropods (possibly insect larvae) feeding on plant roots, as well as their fossilized fecal pellets, are described from the Middle-Upper Triassic strata in Somerset (United Kingdom) by Howson, Tucker & Whitaker (2025).^[224]
Le Cadre et al. (2025) report the discovery of a bristly millipede very similar to extant Polyxenus lagurus and two member of an extinct mite lineage (Glaesacarus rhombeus) in a single piece of the Eocene Baltic amber, providing evidence of shared habitat of the studied arthropods and possible evidence of bradytely in bristly millipedes.^[225]
The family Sunellidae is assigned to the order Isoxyida.^[226]
Muscioni et al. (2025) revise the arthropod assemblage from the Villaggio del Pescatore Lagerstätte (Italy), identify palaemonid, cirolanid and possible heteropteran insect fossil material, and interpret the studied fossils as indicative of presence of a coastal, marginal environment during the Campanian.^[227]
Tello et al. (2025) revise the fossil record of insects, arachnids and a putative myriapods from Chile.^[228]

References

^ ^a ^b Dunlop, J. A.; Bartel, C. (2025). "A new species of fossil Phrynus Lamarck, 1801, from Dominican Republic amber (Amblypygi: Phrynidae)". Zootaxa. 5563 (1): 64–72. doi:10.11646/zootaxa.5563.1.7. PMID 40173985.
^ ^a ^b ^c ^d ^e ^f ^g ^h Wunderlich, J. (2025). "New fossil spider (Araneae) taxa in Eocene Baltic and Bitterfeld ambers" (PDF). In Jörg Wunderlich (ed.). Papers on Taxonomy and Evolution of Fossil and Extant Spiders (Araneida). Beiträge zur Araneologie. Vol. 18. Jörg Wunderlich. pp. 64–90.
^ ^a ^b ^c ^d ^e ^f Wunderlich, J. (2025). "Contribution to taxonomy and phylogeny of the archaeoid spider branch of the superfamily Palpimanoidea (Araneae), with new descriptions of fossil taxa" (PDF). In Jörg Wunderlich (ed.). Papers on Taxonomy and Evolution of Fossil and Extant Spiders (Araneida). Beiträge zur Araneologie. Vol. 18. Jörg Wunderlich. pp. 37–63.
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[SadeeqandAziz2025-87] Sadeeq, A. A.; Aziz, N. M. (2025). "Identifying New Ostracods Species of Genera Bairdia, Bythocypris, Paracypris and Abyssocypris Belongs to Aaliji Formation from Borehole Jambour (46) in Kirkuk Area, Northeastern Iraq". Iraqi Geological Journal. 58 (1A): 245–254. doi:10.46717/igj.58.1A.17ms-2025-1-27.

[PR29Irizukietal-88] Irizuki, T.; Suzuki, K.; Aoshima, S.; Kawano, S. (2025). "Fossil ostracod faunas from the Katsuta Group of the Setouchi Geologic Province in southwestern Japan and their paleobiogeography during the mid-Miocene Climatic Optimum". Paleontological Research. 29 250032: 253–285. Bibcode:2025PalRe..29..253I. doi:10.2517/prpsj.250032.

[Zootaxa56923-89] Guillam, E.; Hambardzumyan, T. (2025). "Replacement names for homonym species of two Palaeozoic ostracods". Zootaxa. 5692 (3): 594–596. doi:10.11646/zootaxa.5692.3.11. PMID 41119008.

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[91] Salas, M. J.; Sterren, A. F.; Cisterna, G. A. (2025). "Ostracod faunas from the Late Mississippian–Early Pennsylvanian, Calingasta–Uspallata Basin, central west Argentina: new records from glacial–postglacial successions". Journal of Paleontology. 99 (4): 798–817. doi:10.1017/jpa.2025.10130.

[PJ591Aparchitellina-92] Sobolev, D. B. (2025). "New Species of the Ostracod Genus Aparchitellina from the Yba Formation (Givetian?–Frasnian) of Southern Timan (Djejimparma Uplift)". Paleontological Journal. 59 (1): 24–30. Bibcode:2025PalJ...59...24S. doi:10.1134/S0031030124601476.

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[JPZhangetalostracods-94] Zhang, Y.; Yasuhara, M.; Tian, S. Y.; Hopkins, M. J. (2025). "Late Ordovician ostracods of Valcour Island, New York, USA". Journal of Paleontology: 1–43. doi:10.1017/jpa.2025.10148.

[HBMetteMoser-95] ^ ^a ^b ^c ^d ^e ^f ^g Mette, W.; Moser, M. (2025). "A high diversity deep marine ostracod assemblage from the Middle Triassic (early Ladinian) of the Northern Calcareous Alps (Austria)". Historical Biology: An International Journal of Paleobiology: 1–41. doi:10.1080/08912963.2025.2520618.

[AlcheringaForeletal-96] Forel, M.-B.; McCartain, E.; Haig, D. W. (2025). "Triassic ostracods from the southeastern Tethys: the Timor-Leste record". Alcheringa: An Australasian Journal of Palaeontology: 1–40. doi:10.1080/03115518.2025.2522389.

[Chimaerabinoda-97] ^ ^a ^b ^c ^d ^e ^f Mcgairy, A.; Nguyen, P. D.; Williams, M.; Stocker, C. P.; Harvey, T. H. P.; Komatsu, T.; Miller, C. G. (2025). "Ostracods from the Upper Ordovician Phu Ngu Formation, Northern Vietnam: systematics, paleoecology and paleobiogeographical significance". Paleontological Research. 29 240024: 124–148. Bibcode:2025PalRe..29..124M. doi:10.2517/prpsj.240024.

[Chargatanella-98] Melnikova, I. D.; Ariunchimeg, Y.; Gereltsetseg, L. (2025). "Some Silurian ostracods of Mongolia". Paleontological Journal. 59 (4): 388–400. Bibcode:2025PalJ...59..388M. doi:10.1134/S0031030125600398.

[CRDiezSomolinosetal-99] Díez-Somolinos, M.; Barroso-Barcenilla, F.; Berrocal-Casero, M.; Rodríguez-Lázaro, J.; Sevilla García, P.; Sames, B. (2025). "New species of ostracods from the non-marine upper Barremian (Lower Cretaceous) of Vadillos-1 (Cuenca, Spain)". Cretaceous Research. 175 106158. Bibcode:2025CrRes.17506158D. doi:10.1016/j.cretres.2025.106158.

[Hobetsucythereis-100] ^ ^a ^b ^c ^d ^e ^f Tanaka, G.; Nishimura, T. (2025). "Late Cretaceous (Campanian) Shallow-Marine Ostracods From Northeastern Margin of Asia—Palaeoenvironment and Biogeographical Significance". Geological Journal gj.70151. doi:10.1002/gj.70151.

[Qadafaryetalostracods-101] Qadafary, R. A.; Taha, Z. A.; Kharajiany, S. O. A. (2025). "Biostratigraphy of calcareous nannofossils and ostracods from the upper Paleocene-lower Eocene Kolosh Formation at Qaradagh Mountain, Sulaymaniyah Area, Kurdistan Region in Iraq". Carbonates and Evaporites. 40 (4) 148. Bibcode:2025CarEv..40..148Q. doi:10.1007/s13146-025-01180-3.

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[106] Forel, M.-B.; Huang, J.; Yu, J.; Wan, J.; Zhang, Q.; Zhou, C.; Hu, S.; Wen, W. (2025). "Middle Triassic ostracods from Yunnan, South China". Alcheringa: An Australasian Journal of Palaeontology. 49 (3): 555–570. Bibcode:2025Alch...49..555F. doi:10.1080/03115518.2025.2488055.

[RM89OuedBirMoka-107] Benkhedda, A.; Sciuto, F.; Benzina, M.; Draoui, A.; Hebib, H. (2025). "Some Tortonian ostracods from the Oued Bir Moka section (Tafna Basin, NW Algeria)". Revue de Micropaléontologie. 89 100866. Bibcode:2025RvMic..8900866B. doi:10.1016/j.revmic.2025.100866.

[PJ5811ostracods-108] Mahalakshmi, T.; Kumari, M.; Muduli, G. P. (2025). "Kimmeridgian (Upper Jurassic) Ostracodes from the Jhuran Formation, Mainland Kachchh, Gujarat, India". Paleontological Journal. 58 (11): 1216–1225. doi:10.1134/S0031030124601087.

[PJ591Lophocythere-109] Shurupova, Ya. A. (2025). "New Data on Evolution of the Middle Jurassic Ostracod Genus Lophocythere Sylvester-Bradley on the Russian Plate". Paleontological Journal. 59 (1): 31–41. Bibcode:2025PalJ...59...31S. doi:10.1134/S0031030124601488.

[110] Wang, Y. (2025). "First report of the non-marine ostracod fauna from the Lower Cretaceous Xiaonangou Formation of the Baishan Basin, NE China". Zootaxa. 5660 (4): 560–572. doi:10.11646/zootaxa.5660.4.6. PMID 41119857.

[PJ591Tesakova-111] Tesakova, E. M. (2025). "New Neurocythere and Terquemula (Ostracoda, Crustacea) from the Callovian of the Russian Plate". Paleontological Journal. 59 (1): 42–55. Bibcode:2025PalJ...59...42T. doi:10.1134/S003103012460149X.

[RM89RiodoRastoFm-112] Bergue, C. T.; Naumcheva, M.; Silva, R. C.; Forel, M.-B.; Sedor, F. A. (2025). "Late Permian darwinulocopines (Crustacea: Ostracoda) from the Rio do Rasto Formation, Brazil". Revue de Micropaléontologie. 89 100865. Bibcode:2025RvMic..8900865B. doi:10.1016/j.revmic.2025.100865.

[113] Maia, R. J. A.; Almeida-Lima, D.; Guzmán, J.; Piovesan, E. K. (2025). "What is Pattersoncypris Bate (Ostracoda: Cyprididae)? A review of the genus and its species". Revue de Micropaléontologie. 87 100833. Bibcode:2025RvMic..8700833M. doi:10.1016/j.revmic.2025.100833.

[114] Antonietto, L. S.; Miller, C. G.; Holgado, B.; Gonçalves, T. S.; Clark, B. (2025). "Using computed tomography scanning in exceptionally preserved Lower Cretaceous ostracods from Brazil to reassess the evolutionary history of Paracyprididae (Podocopida: Cypridocopina)". Zoological Journal of the Linnean Society. 204 (2). zlaf050. doi:10.1093/zoolinnean/zlaf050.

[Woodeltia-115] Mukai, K.; Tanaka, G. (2025). "Early Pliocene ostracodes from the Takikawa Formation in Hokkaido, northern Japan, and the new genus Woodeltia moving in the North Pacific Ocean". Journal of Paleontology: 1–17. doi:10.1017/jpa.2025.10178.

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[119] Lim, W. (2025). "Diversification dynamics of the Mesozoic ostracod family Cyprideidae Martin, 1940: Disentangling taxonomic inflation and environmental drivers". Palaeontologia Electronica. 28 (3) 28.3.a54. doi:10.26879/1600.

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[128] Gale, A. S.; Jagt, J. W. M. (2025). "A new species of the cirripede genus Proverruca Withers, 1914 (Crustacea, Thoracica) from the upper Campanian (Upper Cretaceous) of northeastern Belgium". Zootaxa. 5583 (2): 383–390. doi:10.11646/zootaxa.5583.2.9. PMID 40174107.

[129] Buckeridge, J. S.; Smith, P. M. (2025). "A new pedunculate cirripede (barnacle) from the Early Cretaceous of Central Queensland, Australia". Alcheringa: An Australasian Journal of Palaeontology: 1–9. doi:10.1080/03115518.2025.2492224.

[130] Bojarski, B.; Cierocka, K.; Szwedo, J. (2025). "Early Miocene coastal taphonomy: piddock and barnacle inclusions from Chiapas amber". Acta Palaeontologica Polonica. 70 (3): 495–505. doi:10.4202/app.01200.2024.

[131] Gale, A. S.; Sadorf, E. (2025). "Pliocene distribution of the cirripede Verruca stroemia (O.F. Müller, 1776) and revised definitions of the verrucid genera Verruca, Metaverruca and Priscoverruca (Thoracica, Crustacea)". Acta Geologica Polonica. 75 (1). e39. doi:10.24425/agp.2024.152661.

[132] Mychko, E. V. (2025). "The first Triassic cyclidan (Multicrustacea: Cyclida) from Russia". Historical Biology: An International Journal of Paleobiology: 1–19. doi:10.1080/08912963.2025.2592987.

[Missouriclus-133] Schweitzer, C. E.; Mychko, E. V.; Lehnert, M. S. (2025). "North American midcontinental cyclidans (Pancrustacea: Multicrustacea: Cyclida) revisited". Journal of Paleontology. 45 (3) ruaf045. doi:10.1093/jcbiol/ruaf045.

[134] Geyer, G.; Sell, J. (2025). "Norestheria (Spinicaudata, Crustacea): Morphology and its stratigraphical and geographic significance". Palaeontologia Electronica. 28 (3) 28.3.a48. doi:10.26879/1564.

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[136] Poschmann, M. J.; Hegna, T. A.; Numberger-Thuy, L.; Thuy, B. (2025). "Mass mortality of clam shrimp (Crustacea, Branchiopoda) from the Lower Devonian (Emsian) Fossil-Lagerstätte of Consthum, Luxembourg—paleoecologic and taxonomic implications". Journal of Paleontology. 99 (3): 544–556. doi:10.1017/jpa.2024.82.

[137] Reynolds, R. W.; Wong Hearing, T. W.; Williams, M.; Harvey, T.; Yanagihara, A.; Murdock, D.; Repetski, J.; Loch, J.; Lunt, D. J.; Gostling, N. J. (2025). "A new exceptionally preserved phosphatocopid crustacean from the Furongian of Laurentia and a synthesis of Cambrian phosphatocopid distribution patterns". Journal of Paleontology: 1–14. doi:10.1017/jpa.2025.10180.

[Mesozoic21-138] Fang, S.-H.; Feng, Z.; Liao, H.-Y. (2025). "Revising some fossil clam shrimps (Branchiopoda: Diplostraca: Spinicaudata) from the Upper Triassic in Yunnan Province and Chongqing City, southwestern China". Mesozoic. 2 (1): 70–79. doi:10.11646/mesozoic.2.1.9.

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