Amtgay [SMPE]: Cenomanian - Santonian, Mongolia
collected by SMPE 1975

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Reptilia - Therizinosauridae
Segnosaurus galbinensis n. gen., n. sp. Perle 1979
Perle 1979 1 individual
PIN 100/80
Reptilia
Amtosaurus magnus n. gen., n. sp. Kurzanov and Tumanova 1978
1 individual
nomen dubium belonging to Ornithischia
PIN 3780/2
Reptilia - Paralligatoridae
Shamosuchus ulgicus n. sp. (Efimov 1981)
Storrs and Efimov 2000
synonym of Paralligator gradilifrons
PIN 3458/501 - type (partial skull and jaws with associated dermal armour)
Reptilia - Testudines - Adocidae
Adocidae indet. Cope 1869
Danilov et al. 2011 1 specimen
Adocus sp. Cope 1868
Danilov et al. 2011
Adocus amtgai n. sp. Narmandakh 1985
Danilov et al. 2011 2 individuals
PIN 3642/2, 3648-3
Reptilia - Testudines - Nanhsiungchelyidae
Nanhsiungchelyidae indet. Yeh 1966
Danilov and Syromyatnikova 2008
Listed as Zangerlia sp. by Shuvalov and Chkhikvadze (1979)
Danilov and Syromyatnikova 2008
Listed as Basilemys orientalis by Sukhanov and Narmandakh (1977)
see common names

Geography
Country:Mongolia State/province:Omnogov
Coordinates: 43.1° North, 107.5° East (view map)
Paleocoordinates:45.0° North, 98.1° East
Basis of coordinate:estimated from map
Altitude:982 meters
Geographic resolution:small collection
Time
Period:Cretaceous Epoch:Late/Upper Cretaceous
Key time interval:Cenomanian - Santonian
Age range of interval:100.50000 - 83.60000 m.y. ago
Stratigraphy
Formation:Baynshire
Stratigraphic resolution:bed
Stratigraphy comments: = Bainshirenskaya, Bayn Shire

Kurumada et al. 2020: Two meaningful calcite U–Pb ages were obtained; 95.9 ± 6.0 and 89.6 ± 4.0 Ma, which are consistent with published ages from the Bayn Shire Formation.
Lithology and environment
Primary lithology: not reported
Environment:terrestrial indet.
Taphonomy
Modes of preservation:body
Degree of concentration:dispersed
Size of fossils:macrofossils
Preservation of anatomical detail:medium
Disassociated major elements:all
Fragmentation:occasional
Temporal resolution:snapshot
Collection methods and comments
Collection methods:field collection
Reason for describing collection:taxonomic analysis
Museum repositories:PIN
Collectors:SMPE Collection dates:1975
Metadata
Also known as:Amtgai Khuduk
Database number:79724
Authorizer:M. Carrano, R. Butler, P. Mannion Enterer:M. Carrano, P. Mannion, R. Butler
Modifier:M. Carrano Research group:vertebrate
Created:2008-03-19 10:03:57 Last modified:2022-03-23 15:22:18
Access level:the public Released:2008-03-19 10:03:57
Creative Commons license:CC BY
Reference information

Primary reference:
13890.ETE S. M. Kurzanov and T. A. Tumanova. 1978. The structure of the endocranium in some Mongolian ankylosaurs. Paleontological Journal 1978(3):369-374 [M. Carrano/M. Carrano/M. Carrano]

Secondary references:

64040 V. M. Arbour and P. J. Currie. 2016. Systematics, phylogeny and palaeobiogeography of the ankylosaurid dinosaurs. Journal of Systematic Palaeontology 14(5):385-444 [G. Lloyd/G. Lloyd/M. Carrano]
15004ETE R. Barsbold. 1983. Khishchnye dinosavry mela Mongoliy [Carnivorous dinosaurs from the Cretaceous of Mongolia]. Transactions of the Joint Soviet-Mongolian Paleontological Expedition 19:1-117 [M. Carrano/M. Carrano]
37404ETE I. G. Danilov, V. B. Sukhanov, and E. V. Syromyatnikova. 2011. New Asiatic materials on turtles of the family Adocidae with a review of the adocid record in Asia. Proceedings of the Zoological Institute, Russian Academy of Sciences 315(2):101-132 [M. Carrano/M. Carrano/P. Mannion]
41748 I. G. Danilov and E. V. Syromyatnikova. 2008. New materials on turtles of the family Nanhsiungchelyidae from the Cretaceous of Uzbekistan and Mongolia, with a review of the Nanhsiungchelyid record in Asia. Proceedings of the Zoological Institute RAS 312(1/2):3-25 [R. Benson/R. Benson/P. Mannion]
69233 E. N. Kurochkin and R. Barsbold. 2000. The Russian-Mongolian expeditions and research in vertebrate palaeontology. In M. J. Benton, M. A. Shishkin, D. M. Unwin, & E N. Kurichkin (eds.), The Age of Dinosaurs in Russia and Mongolia 235-255 [M. Carrano/M. Carrano]
79239 Y. Kurumada, S. Aoki, K. Aoki, D. Kato, M. Saneyoshi, K. Tsogtbaatar, B. F. Windley and S. Ishigaki. 2020. Calcite U–Pb age of the Cretaceous vertebrate-bearing Bayn Shire Formation in the Eastern Gobi Desert of Mongolia: Usefulness of caliche for age determination. Terra Nova 32:246-252 [P. Mannion/G. Varnham/G. Varnham]
13910ETE A. Perle. 1979. Segnosauridae - novoe semeistvo teropod is posdnego mela Mongolii [Segnosauridae - a new family of theropods from the Late Cretaceous of Mongolia]. Trudy - Sovmestnaya Sovetsko-Mongol'skaya Paleontologicheskaya Ekspeditsiya 8:45-55 [M. Carrano/M. Carrano/M. Carrano]
39421 G. W. Storrs and M. B. Efimov. 2000. Mesozoic crocodyliforms of north-central Eurasia. In M. J. Benton, M. A. Shishkin, D. M. Unwin, & E N. Kurichkin (eds.), The Age of Dinosaurs in Russia and Mongolia 402-419 [P. Mannion/P. Mannion/M. Carrano]
41695 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 [R. Benson/R. Benson/M. Carrano]
26796ETE T. A. Tumanova. 1987. Pantsirnyye dinozavry Mongolii [The armored dinosaurs of Mongolia]. Trudy Sovmestnaya Sovetsko-Mongol'skaya Paleontologicheskaya Ekspeditsiya 32:1-80 [M. Carrano/M. Carrano/M. Carrano]
18351ETE T. A. Tumanova. 2000. Armoured dinosaurs from the Cretaceous of Mongolia. In M. J. Benton, M. A. Shishkin, D. M. Unwin, & E N. Kurichkin (eds.), The Age of Dinosaurs in Russia and Mongolia 517-532 [M. Carrano/M. Carrano/M. Carrano]
80958 L. E. Zanno. 2010. A taxonomic and phylogenetic re-evaluation of Therizinosauria (Dinosauria: Maniraptora). Journal of Systematic Palaeontology 8(4):503-543 [M. Carrano/M. Carrano]