Khuren Dukh Formation

Khuren Dukh Formation
Stratigraphic range: Early Cretaceous
(Aptian–Albian),[1]
TypeGeological formation
Sub-unitsLower, Middle & Upper Members
UnderliesTerrace deposit, Basalt
OverliesKhalzan Uul Formation, Basement
ThicknessOver 100 m (330 ft)
Lithology
PrimarySandstone, conglomerate, siltstone, mudstone
Location
Coordinates45°54′N 108°24′E / 45.9°N 108.4°E / 45.9; 108.4
Approximate paleocoordinates49°18′N 100°12′E / 49.3°N 100.2°E / 49.3; 100.2
RegionDornogovi Province
CountryMongolia
ExtentChoyr Basin
Khuren Dukh Formation (Mongolia)

The Khuren Dukh Formation, also known as the Khukhtyk Formation, Khukhteeg Formation, or Hühteeg Svita, (Mongolian: Хөхтээг формаци, Khökhteeg Formatsi), is a geological formation in Mongolia whose strata date back to the Aptian–Albian ages of the Early Cretaceous.[2][3] Dinosaur remains are among the fossils that have been recovered from the formation.[4]

Vertebrate paleofauna

Dinosaurs

Dinosaurs of the Khuren Dukh Formation (Hühteeg Svita)
Genus Species Location Stratigraphic position Material Notes Images
Altirhinus A. kurzanovi "Complete skull, partial skull, associated postcrania, several individuals."[5] A hadrosauroid ornithopod
Choyrodon[6] C. barsboldi Partial skull, cervical ribs A hadrosauroid ornithopod
Iguanodon I. orientalis An indeterminate Iguanodont. A referred skull was reclassified as Altirhinus.
Harpymimus[7] H. okladnikovi Partial skeleton An ornithomimosaur
Zavacephale[8] Z. rinpoche Skull and partial articulated skeleton An early pachycephalosaur

Choristoderes

Choristoderes of the Khuren Dukh Formation (Hühteeg Svita)
Genus Species Location Stratigraphic position Material Notes Images
Khurendukhosaurus K. orlovi, Indeterminate Partial skeleton Long-necked choristodere
Tchoiria T. namsarai Crocodile-like neochoristoderan.
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.

See also

References

  1. ^ Hasegawa, Hitoshi; Ando, Hisao; Hasebe, Noriko; Ichinnorov, Niiden; Ohta, Tohru; Hasegawa, Takashi; Yamamoto, Masanobu; Li, Gang; Erdenetsogt, Bat-Orshikh; Heimhofer, Ulrich; Murata, Takayuki; Shinya, Hironori; Enerel, G.; Oyunjargal, G.; Munkhtsetseg, O. (2018-02-27). "Depositional ages and characteristics of Middle– Upper Jurassic and Lower Cretaceous lacustrine deposits in southeastern Mongolia". Island Arc. 27 (3). Bibcode:2018IsArc..27E2243H. doi:10.1111/iar.12243. ISSN 1038-4871.
  2. ^ Nosova, Natalya; Kostina, Elena (2022-09-01). "New findings of the female reproductive structures of Umaltolepis Krassilov and associated leaves of Pseudotorellia Florin in the Lower Cretaceous of Mongolia". Review of Palaeobotany and Palynology. 304 104696. Bibcode:2022RPaPa.30404696N. doi:10.1016/j.revpalbo.2022.104696. ISSN 0034-6667.
  3. ^ Nichols et al., 2006
  4. ^ Weishampel et al., 2004, pp.563-570
  5. ^ "Table 19.1," in Weishampel, et al. (2004). Page 415.
  6. ^ Gates et al., 2018
  7. ^ Barsbold & Perle, 1984
  8. ^ Chinzorig, Tsogtbaatar; Takasaki, Ryuji; Yoshida, Junki; Tucker, Ryan T.; Buyantegsh, Batsaikhan; Mainbayar, Buuvei; Tsogtbaatar, Khishigjav; Zanno, Lindsay E. (September 17, 2025). "A domed pachycephalosaur from the early Cretaceous of Mongolia". Nature: 1–8. doi:10.1038/s41586-025-09213-6. ISSN 1476-4687.

Bibliography

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