Dzunbain Formation

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Dzunbain Formation
Stratigraphic range: Aptian–Albian
Type Geological formation
Sub-units
Thicknessup to 60 metres (200 ft) at Chamrin-Us
Lithology
Primary Claystone and sandstone
Location
Coordinates 42°27′00″N102°25′01″E / 42.45°N 102.417°E / 42.45; 102.417
Region Erdene 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). [1] The formation contains fossils of mammals, reptiles, turtles and dinosaurs. The Dzunbain Formation is equivalent to the Khuren Dukh Formation. [2]

Contents

Paleobiota of the Dzunbain Formation

Amphibians

GenusSpeciesLocationStratigraphic positionMaterialNotesImage
Eodiscoglossus [3] E. sp. [3] Khovboor

Squamates

GenusSpeciesLocationStratigraphic positionMaterialNotesImage
Dorsetisaurus [4] D. sp. [4] Khovboor
Hoburogekko [5] H. suchanovi [5] Khovboor"A partial skull." [5]
Hodzhakulia [4] H. sp. [4] Khovboor
Iguania [4] Indeterminate [4] Khovboor
Lacertilia [4] Indeterminate [4] Khovboor
Paramacellodidae [4] Indeterminate [4] Khovboor
Priscagamidae [4] Indeterminate [4] Khovboor
Slavoia [4] S. sp. [4] Khovboor Reconstruction-of-the-whole-skeleton-of-Slavoia-darevskii-in-dorsal-view.png
Xantusiidae [4] Indeterminate [4] Khovboor
Xenosauridae [4] Indeterminate [4] Khovboor

Mammals

GenusSpeciesLocationStratigraphic positionMaterialNotesImage
Arginbaatar [6] A. dimitrievae [6] Khovboor
Arguimus [7] A.khosbajari [7] Khovboor
Eobaatar [8] E. magnus and E. minor [8] Khovboor"Lower jaw fragment (E. magnus)." [8]
Gobiconodon [9] G. borissiaki and G. hobuvensis [9] Khovboor"Both species known only from cranial remains." [9] Gobiconodon hoburensis.jpg
Gobiotheriodon [10] G. infinitus [10] KhovboorPreviously known as " Gobiodon ". [10]
Heptoconodon IndeterminateKhovboor
Hovurlestes [11] H. noyon [11] Khovboor
Kielantherium [12] K. gobiensis [12] Khovboor
Monobaatar [8] M. mimicus [8] Khovboor
Prokennolestes [13] P. minor, P. sp. and P. trofimovi [13] Khovboor
Plagiaulacidae [8] Indeterminate [8] Khovboor

Turtles

GenusSpeciesLocationStratigraphic positionMaterialNotesImage
Hangaiemys [14] H. hoburensis [14] Khovboor
Mongolemys [14] M. sp. [14] Khovboor

Dinosaurs

GenusSpeciesLocationStratigraphic positionMaterialNotesImage
Mongolostegus [15] M. exspectabilis [15] Chamrin-Us"Posterior dorsal and anterior caudal vertebrae as well as pelvic material." [15] Previously known as Wuerhosaurus mongoliensis. [16] One of the last surviving stegosaurs. [15]
Psittacosauridae [17] Indeterminate [17] Chamrin-Us
Psittacosaurus [18] P. mongoliensis [18] Khovboor
Sauropoda IndeterminateChamrin-Us and Khovboor
Shamosaurus [2] S. scutatus [2] 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." [19]
Stegosauridae [15] Indeterminate [15] Chamrin-UsOne of the last surviving stegosaurs. [15]
Troodontidae [20] Indeterminate [20] Chamrin-Us

See also

References

  1. ↑ Shuvalov V. F. (1974) O geologicheskom stroenii i vozraste mestonakhozhdenii Khobur i Khuren-Dukh [On the geology and age of the Khobur and Khuren-Dukh localities], Mesozoic and Cenozoic Faunas and Biostratigraphy of Mongolia; The Joint Soviet-Mongolian Paleontological Expedition, Transactions 1, 296-304
  2. 1 2 3 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. 1 2 Shishkin M. A. (2000) Mesozoic amphibians from Mongolia and the Central Asiatic republics, The Age of Dinosaurs in Russia and Mongolia, 297-308
  4. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 Alifanov V. R. (2000) The fossil record of Cretaceous lizards from Mongolia, The Age of Dinosaurs in Russia and Mongolia, 368-389
  5. 1 2 3 Alifanov, V.R. (1989) The oldest gecko (Lacertilia, Gekkonidae) from the Lower Cretaceous of Mongolia. Paleontologicheskii Zhurnal 1989:124–126. [in Russian].
  6. 1 2 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. 1 2 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. 1 2 3 4 5 6 7 Kielan-Jaworowska et al. (1987), "Early Cretaceous multituberculates from Mongolia and a comparison with Late Jurassic form". Acta Palaeontologica Polonica32, p. 3-47.
  9. 1 2 3 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. 1 2 3 B. A. Trofimov. (1997). A new generic name Gobiotheriodon for a symmetrodont mammal Gobiodon Trofimov, 1980. Acta Palaeontologica Polonica 42(4):496
  11. 1 2 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. 1 2 D. Dashzeveg. (1975). New primitive therian from the early Cretaceous of Mongolia. Nature 256:402-403
  13. 1 2 Z. Kielan-Jaworowska and D. Dashzeveg. (1989). Eutherian mammals from the Early Cretaceous of Mongolia. Zoologica Scripta 18(2):347-355
  14. 1 2 3 4 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. 1 2 3 4 5 6 7 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. 1 2 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. 1 2 Kalandadze N. N., Kurzanov S. M. (1974) Nizhnemelove mestonakhozhdeniya nazemnykh pozvonochnykh Mongolii [Lower Cretaceous terrestrial vertebrate localities of Mongolia], 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. 1 2 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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