Ulan Malgait Formation
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The Ulan Malgait Formation is a Late Jurassic geologic formation in Mongolia. Dinosaur remains are among the fossils that have been recovered from the formation, although as of 2004[update]Script error: No such module "Check for unknown parameters". none have yet been referred to a specific genus.[1]
It is best known for the Shar Teeg locality which has lent its name to Shartegosuchidae, a family of mesoeucrocodylians (relatives of crocodilians), many of which have been found there; Shartegosuchus (the family's type genus) means "Shar Teeg crocodile".[2] It is divided up into 2 subunits, the lower Shar Teg Beds and the upper Ulan Malgait Beds.[3]
The tritylodontids Shartegodon, Nuurtherium and Bienotheroides are known from the formation.,[4] As is docodontan Tegotherium. The turtles Annemys levensis and Annemys latiens and crocodylians Sunosuchus shartegensis and Adzhosuchus fuscus were also recovered from the formation.[5] Numerous species of insects are also known from the formation.[6][7][8][9] which was deposited in a lacustrine environment.
Age
Dollman et al. (2018) argue that the age of the Ulan Malgait Formation is likely to be Oxfordian based on the shared presence of Shartegosuchus and Nominosuchus with the radiometrically-dated Shishigou Formation of China.[10]
See also
References
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- ↑ Weishampel et al., 2004, pp.517-607
- ↑ Dollman et al., 2018
- ↑ Watabe, 2010
- ↑ Velazco et al., 2017
- ↑ Efimov et al., 2000
- ↑ I. D. Sukacheva. 2000. New fossil caddis flies (Trichoptera) from the Shar-Teg locality in Mongolia. Paleontological Journal 34(Suppl 3):S347-S351
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- ↑ Bor Ukhaa hills at Fossilworks.org
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Bibliography
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Further reading
- M. Rabi, V. B. Sukhanov, V. N. Egorova, I. Danilov, and W. G. Joyce. 2014. Osteology, relationships, and ecology of Annemys (Testudines, Eucryptodira) from the Late Jurassic of Shar Teg, Mongolia, and phylogenetic definitions for Xinjiangchelyidae, Sinemydidae, and Macrobaenidae. Journal of Vertebrate Paleontology 34(2):327-352
- M. Watabe, K. Tsogtbaatar, T. Tsuihiji and R. Barsbold. 2003. The first discovery of diverse Jurassic dinosaur faunas in Mongolia. Journal of Vertebrate Paleontology 23(3, suppl.):108A
- 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 309-367
- Y. M. Gubin and S. M. Sinitza. 1996. Shar Teg: a unique Mesozoic locality of Asia. In M. Morales (ed.), The Continental Jurassic. Museum of Northern Arizona Bulletin 60:311-318
- Pages with script errors
- Articles containing potentially dated statements from 2004
- All articles containing potentially dated statements
- Geologic formations of Mongolia
- Jurassic System of Asia
- Jurassic Mongolia
- Tithonian Stage
- Oxfordian Stage
- Sandstone formations
- Siltstone formations
- Lacustrine deposits
- Paleontology in Mongolia
- Govi-Altai Province