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Dzunbain Formation

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Early Cretaceous geologic formation in Mongolia
Dzunbain Formation
Stratigraphic range: Aptian–Albian PreꞒ Ꞓ O S D C P T J K Pg N
TypeGeological formation
Sub-units
Thicknessup to 60 metres (200 ft) at Chamrin-Us
Lithology
PrimaryClaystone and sandstone
Location
Coordinates42°27′00″N 102°25′01″E / 42.45°N 102.417°E / 42.45; 102.417
RegionErdene District, Dornogovi Province, Mongolia
Country Mongolia

The Dzunbain Formation (also known as Dzunbayn Formation) is a geological formation in Mongolia, dating to the Early Cretaceous (Aptian-Albian). The formation contains fossils of mammals, reptiles, turtles and dinosaurs. The Dzunbain Formation is equivalent to the Khuren Dukh Formation.

Paleobiota of the Dzunbain Formation

Amphibians

Genus Species Location Stratigraphic position Material Notes Image
Eodiscoglossus E. sp. Khovboor

Squamates

Genus Species Location Stratigraphic position Material Notes Image
Dorsetisaurus D. sp. Khovboor
Hoburogekko H. suchanovi Khovboor "A partial skull."
Hodzhakulia H. sp. Khovboor
Iguania Indeterminate Khovboor
Lacertilia Indeterminate Khovboor
Paramacellodidae Indeterminate Khovboor
Priscagamidae Indeterminate Khovboor
Slavoia S. sp. Khovboor
Xantusiidae Indeterminate Khovboor
Xenosauridae Indeterminate Khovboor

Mammals

Genus Species Location Stratigraphic position Material Notes Image
Arginbaatar A. dimitrievae Khovboor
Arguimus A. khosbajari Khovboor
Eobaatar E. magnus and E. minor Khovboor "Lower jaw fragment (E. magnus)."
Gobiconodon G. borissiaki and G. hobuvensis Khovboor "Both species known only from cranial remains."
Gobiotheriodon G. infinitus Khovboor Previously known as "Gobiodon".
Heptoconodon Indeterminate Khovboor
Hovurlestes H. noyon Khovboor
Kielantherium K. gobiensis Khovboor
Monobaatar M. mimicus Khovboor
Prokennolestes P. minor, P. sp. and P. trofimovi Khovboor
Plagiaulacidae Indeterminate Khovboor

Turtles

Genus Species Location Stratigraphic position Material Notes Image
Hangaiemys H. hoburensis Khovboor
Mongolemys M. sp. Khovboor

Dinosaurs

Genus Species Location Stratigraphic position Material Notes Image
Mongolostegus M. exspectabilis Chamrin-Us "Posterior dorsal and anterior caudal vertebrae as well as pelvic material." Previously known as Wuerhosaurus mongoliensis. One of the last surviving stegosaurs.
Psittacosauridae Indeterminate Chamrin-Us
Psittacosaurus P. mongoliensis Khovboor
Sauropoda Indeterminate Chamrin-Us and Khovboor
Shamosaurus S. scutatus Chamrin-Us and Khovboor "A complete skull, lower jaws and partial postcranial skeleton with armor. Also referred are a skull piece, lower jaw and two cervical halfrings."
Stegosauridae Indeterminate Chamrin-Us One of the last surviving stegosaurs.
Troodontidae Indeterminate Chamrin-Us

See also

References

  1. Shuvalov V. F. (1974) O geologicheskom stroenii i vozraste mestonakhozhdenii Khobur i Khuren-Dukh , Mesozoic and Cenozoic Faunas and Biostratigraphy of Mongolia; The Joint Soviet-Mongolian Paleontological Expedition, Transactions 1, 296-304
  2. ^ T.A. Tumanova, (1983), "Pervyy ankilozavr iz nizhnego mela Mongolii", In: L.P. Tatarinov, R. Barsbold, E. Vorobyeva, B. Luvsandanzan, B.A. Trofimov, Yu. A. Reshetov, & M.A. Shishkin (eds.), Iskopayemyye reptilii mongolii. Trudy Sovmestnaya Sovetsko-Mongol'skaya Paleontologicheskaya Ekspeditsiya 24: 110-118
  3. ^ Shishkin M. A. (2000) Mesozoic amphibians from Mongolia and the Central Asiatic republics, The Age of Dinosaurs in Russia and Mongolia, 297-308
  4. ^ Alifanov V. R. (2000) The fossil record of Cretaceous lizards from Mongolia, The Age of Dinosaurs in Russia and Mongolia, 368-389
  5. ^ Alifanov, V.R. (1989) The oldest gecko (Lacertilia, Gekkonidae) from the Lower Cretaceous of Mongolia. Paleontologicheskii Zhurnal 1989:124–126. .
  6. ^ Trofimov (1980) Multituberculata and Symmetrodonta from the Lower Cretaceous deposits in Mongolia. Trans. (Dokl) USSR Acad Sci, Earth Sci Sect 251. p. 188-191.
  7. ^ D. Dashzeveg. (1979). Arguimus khosbajari gen. n, sp. n (Peramuridae, Eupantotheria) from the Lower Cretaceous of Mongolia. Acta Palaeontologica Polonica 24(2):199-204
  8. ^ Kielan-Jaworowska et al. (1987), "Early Cretaceous multituberculates from Mongolia and a comparison with Late Jurassic form". Acta Palaeontologica Polonica 32, p. 3-47.
  9. ^ Lopatin, Alexey; Averianov, Alexander (2015). "Gobiconodon (Mammalia) from the Early Cretaceous of Mongolia and Revision of Gobiconodontidae". Journal of Mammalian Evolution. 22 (1): 17–43. doi:10.1007/s10914-014-9267-4. ISSN 1064-7554.
  10. ^ B. A. Trofimov. (1997). A new generic name Gobiotheriodon for a symmetrodont mammal Gobiodon Trofimov, 1980. Acta Palaeontologica Polonica 42(4):496
  11. ^ Lopatin, A. V.; Averianov, A. O. (2018). "A New Stem Placental Mammal from the Early Cretaceous of Mongolia". Doklady Biological Sciences. 478 (1): 8–11. doi:10.1134/s0012496618010027. ISSN 0012-4966.
  12. ^ D. Dashzeveg. (1975). New primitive therian from the early Cretaceous of Mongolia. Nature 256:402-403
  13. ^ Z. Kielan-Jaworowska and D. Dashzeveg. (1989). Eutherian mammals from the Early Cretaceous of Mongolia. Zoologica Scripta 18(2):347-355
  14. ^ V. B. Sukhanov. (2000). Mesozoic turtles of Middle and Central Asia. In M. J. Benton, M. A. Shishkin, D. M. Unwin, & E N. Kurichkin (eds.), The Age of Dinosaurs in Russia and Mongolia
  15. ^ T. A. Tumanova & V. R. Alifanov (2018) First Record of Stegosaur (Ornithischia, Dinosauria) from the Aptian-Albian of Mongolia. Paleontological Journal 52(14) DOI: https://doi.org/10.1134/S0031030118140186 https://link.springer.com/article/10.1134/S0031030118140186
  16. Ulansky, Roman. E. (2014). "Evolution of the stegosaurs (Dinosauria; Ornithischia). Dinologia" (PDF). dinoweb.narod.ru (in Russian). p. 35.
  17. ^ Suslov Y. V., Barsbold R. (1983) Zakhoroneniye psittakozavrov v Khamryn-us (Vostochnaya Gobi, MNR), Trudy - Sovmestnaya Sovetsko-Mongol'skaya Paleontologicheskaya Ekspeditsiya 24, 118-120
  18. ^ Kalandadze N. N., Kurzanov S. M. (1974) Nizhnemelove mestonakhozhdeniya nazemnykh pozvonochnykh Mongolii , Mesozoic and Cenozoic Faunas and Biostratigraphy of Mongolia. The Joint Soviet-Mongolian Paleontological Expedition, Transactions 1, 288-295
  19. Arbour, Victoria Megan, (2014). Systematics, evolution, and biogeography of the ankylosaurid dinosaurs. Ph.D thesis, University of Alberta
  20. ^ Barsbold R., Osmólska H., et al (1987) On a new troodontid (Dinosauria, Theropoda) from the Early Cretaceous of Mongolia, Acta Palaeontologica Polonica 32 1-2, 121-132
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