Naobaogou Formation

Naobaogou Formation
Stratigraphic range:
TypeGeological formation
Sub-unitsMembers I-III
UnderliesLaowopu Formation
OverliesShiyewan Formation
ThicknessMore than 1000 m
Lithology
PrimarySiltstone
OtherConglomerate
Location
Coordinates40°42′N 110°24′E / 40.7°N 110.4°E / 40.7; 110.4
RegionInner Mongolia
CountryChina
ExtentDaqing Mountains
Naobaogou Formation (China)
Naobaogou Formation (Inner Mongolia)

Location of Naobaogou formation

The Naobaogou Formation is a geological formation in the Daqing Mountains of China. It is likely of Lopingian (Late Permian) age. It consists of three rhythms of sediment, labeled members I-III primarily of purple siltstone, but each with a thick basal conglomerate bed. It is notable for its fossil content, producing one of the most diverse Late Permian vertebrate faunas outside Russia and South Africa.[1]

Vertebrate fauna

Color key
Taxon Reclassified taxon Taxon falsely reported as present Dubious taxon or junior synonym Ichnotaxon Ootaxon Morphotaxon
Notes
Uncertain or tentative taxa are in small text; crossed out taxa are discredited.

Synapsids

Dicynodonts

Dicynodonts of the Naobaogou Formation
Genus Species Locality Material Notes Images
Daqingshanodon[2] D. limbus Skull A dicynodont
Dicynodontia Indeterminate Partial skulls Five additional morphotypes in addition to Daqingshanodon and Turfanodon, two of which are closely related to the former taxon and three or four related to Jimusaria.[3][4]
Jimusaria[5] J. monanensis Skulls, cervicals, scapula A dicynodontoid dicynodont
Turfanodon[4] T. jiufengensis Relatively complete skeleton and skulls A dicynodontoid dicynodont

Therocephalians

Therocephalians of the Naobaogou Formation
Genus Species Locality Material Notes Images
Caodeyao[6] C. liuyufengi Partial skull, mandible, humerus A eutherocephalian, closely related to Purlovia.
Euchambersia E. liuyudongi Skull and lower jaw An akidnognathid therocephalian
Jiufengia[7] J. jiai Partial skull and postcranial skeleton An akidnognathid therocephalian
Shiguaignathus[8] S. wangi Partial skull An akidnognathid therocephalian

Pareiasaurs

Pareiasaurs of the Naobaogou Formation
Genus Species Locality Material Notes Images
Elginia[1] E. wuyongae Partial skull A pareiasaur
Yinshanosaurus[9] Y. angustus Partial articulated skeleton and skull, additional isolated skull A pareiasaur

Reptiliomorphs

Reptiliomorphs of the Naobaogou Formation
Genus Species Locality Material Notes Images
Gansurhinus[10][11] G. naobaogouensis Relatively complete skeleton of an immature individual A captorhinid
Laosuchus[12] L. hun Partial skull and postcranial skeleton A chroniosuchian

References

  1. ^ a b Liu, J.; Bever, G.S. (2018). Angielczyk, K. (ed.). "The tetrapod fauna of the upper Permian Naobaogou Formation of China: a new species of Elginia (Parareptilia, Pareiasauria)". Papers in Palaeontology. 4 (2): 197–209. doi:10.1002/spp2.1105. S2CID 135273110.
  2. ^ Zhuh Y (1989). "The discovery of dicynodonts in Daqingshan Mountain, Nei Mongol (Inner Mongolia)" (PDF). Vertebrata PalAsiatica. 27 (1): 9–27.
  3. ^ Liu, J. (2019). "The tetrapod fauna of the upper Permian Naobaogou Formation of China— 4. the diversity of dicynodonts". Vertebrata PalAsiatica: 173–180. doi:10.19615/j.cnki.1000-3118.190522.
  4. ^ a b Liu, J. (2021). "The tetrapod fauna of the upper Permian Naobaogou Formation of China: 6. Turfanodon jiufengensis sp. nov. (Dicynodontia)". PeerJ. 9 e10854. doi:10.7717/peerj.10854. PMC 7896508. PMID 33643709.
  5. ^ Shi, Y.-T.; Liu, J. (2023). "The tetrapod fauna of the upper Permian Naobaogou Formation of China: 10. Jimusaria monanensis sp. nov. (Dicynodontia) shows a unique epipterygoid". PeerJ. 11 e15783. doi:10.7717/peerj.15783. ISSN 2167-8359. PMC 10399559. PMID 37547715.
  6. ^ Liu, Jun; Abdala, Fernando (2020-05-28). "The tetrapod fauna of the upper Permian Naobaogou Formation of China: 5. Caodeyao liuyufengi gen. et sp. nov., a new peculiar therocephalian". PeerJ. 8 e9160. doi:10.7717/peerj.9160. ISSN 2167-8359. PMC 7261480. PMID 32523808.
  7. ^ Liu J, Abdala F (2019-02-22). "Jiufengia jiai gen. et sp. nov., a large akidnognathid therocephalian". PeerJ. 7 e6463. doi:10.7717/peerj.6463. PMC 6388668. PMID 30809450.
  8. ^ Liu J, Abdala F (2017-12-06). "Shiguaignathus wangi gen. et sp. nov., the first akidnognathid therocephalian from China". PeerJ. 5 e4150. doi:10.7717/peerj.4150. PMC 5723136. PMID 29230374.
  9. ^ Yi, Jian; Liu, Jun (2025-06-04). "The tetrapod fauna of the upper Permian Naobaogou Formation of China: a new mid‐sized pareiasaur Yinshanosaurus angustus and its implications for the phylogenetic relationships of pareiasaurs". Papers in Palaeontology. 11 (3). doi:10.1002/spp2.70020. ISSN 2056-2799.
  10. ^ Reisz RR, Liu J, Li JL, Müller J (May 2011). "A new captorhinid reptile, Gansurhinus qingtoushanensis, gen. et sp. nov., from the Permian of China". Die Naturwissenschaften. 98 (5): 435–41. Bibcode:2011NW.....98..435R. doi:10.1007/s00114-011-0793-0. PMID 21484260. S2CID 20274349.
  11. ^ Liu, Jun (2023-05-09). "The tetrapod fauna of the upper Permian Naobaogou Formation of China: 9. A new species of Gansurhinus (Reptilia: Captorhinidae) and a revision of Chinese captorhinids". Journal of Vertebrate Paleontology. 42 (5) e2203200. doi:10.1080/02724634.2023.2203200. ISSN 0272-4634. S2CID 243245020.
  12. ^ Liu, J.; Chen, J. (2021). "The tetrapod fauna of the upper Permian Naobaogou Formation of China: 7. Laosuchus hun sp. nov. (Chroniosuchia) and interrelationships of chroniosuchians". Journal of Systematic Palaeontology. 18 (24): 2043–2058. doi:10.1080/14772019.2021.1873435. S2CID 232116225.
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