Zos, Ukhaa Tolgod (AMNH): Late/Upper Campanian, Mongolia
collected 1993-1996
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Reptilia
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Isodontosaurus gracilis
Gilmore 1943
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1 individual | |||||||||
| IGM 3/90 | ||||||||||
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Reptilia
- Priscagamidae
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Mimeosaurus crassus
Gilmore 1943
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1 individual | |||||||||
| IGM 3/76 (MAE 96-105) | ||||||||||
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Reptilia
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Ctenomastax parva n. gen., n. sp.
Gao and Norell 2000
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1 individual | |||||||||
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Crocodylia indet.
(Owen 1842)
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= Zosuchus davidsoni n. gen., n. sp.
Pol and Norell 2004
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Pol and Norell 2004 | |||||||||
| IGM 100/1305 - holotype (skull and lower jaws) and referred specimens (IGM 100/1304, 100/ 1306, 100/1307, and 100/1308) | ||||||||||
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Reptilia
- Gobiosuchidae
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Zaraasuchus shepardi n. gen., n. sp.
Pol and Norell 2004
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Pol and Norell 2004 | |||||||||
| IGM 100/1321 - holotype (posterior region of the skull and lower jaws preserved in articulation with cervical vertebrae, osteoderms, and forelimb elements) | ||||||||||
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Reptilia
- Protoceratopsidae
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Protoceratopsidae indet.
Granger and Gregory 1923
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Reptilia
- Thescelosauridae
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Haya griva
Makovicky et al. 2011
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Barta and Norell 2021 | |||||||||
| IGM 100/3181 | ||||||||||
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Mammalia
- Zalambdalestidae
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cf. Zalambdalestes sp.
Gregory and Simpson 1926
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Wible et al. 2004 | 1 specimen | ||||||||
| PSS-MAE 131, articulated skeleton and skull with attached lower jaws | ||||||||||
| see common names | ||||||||||
Geography
| Country: | Mongolia | State/province: | Omnogov Aimak |
| Coordinates: | 43.7° North, 100.9° East (view map) | ||
| Paleocoordinates: | 40.9° North, 90.2° East | ||
| Basis of coordinate: | based on nearby landmark | ||
| Geographic resolution: | local area |
Time
| Period: | Cretaceous | Epoch: | Late/Upper Cretaceous |
| Stage: | Campanian | 10 m.y. bin: | Cretaceous 7 |
| Key time interval: | Late/Upper Campanian | ||
| Age range of interval: | 83.60000 - 72.10000 m.y. ago |
Stratigraphy
| Formation: | Djadokhta | ||||
| Stratigraphy comments: stratigraphically below Ukhaa Tolgod
Dashzeveg et al. 2005: The quick stratigraphic succession of normal and reversed magnetozones suggests, but does not clearly establish, that the sediments may have been deposited during the rapid sequence of polarity changes in the late part of the Campanian between about 75 to 71 Ma. |
Lithology and environment
| Primary lithology: | red sandstone |
| Includes fossils? | Y |
| Environment: | fluvial indet. |
Taphonomy
| Modes of preservation: | body |
| Size of fossils: | macrofossils |
| Preservation of anatomical detail: | excellent |
| Articulated whole bodies: | some |
| Associated major elements: | some |
| Fragmentation: | occasional |
Collection methods and comments
| Collection methods: | surface (float),surface (in situ),mechanical,field collection |
| Reason for describing collection: | taxonomic analysis |
| Museum repositories: | AMNH | Collection dates: | 1993-1996 |
Metadata
| Also known as: | Zos Wash | ||
| Database number: | 68517 | ||
| Authorizer: | M. Carrano, P. Mannion, R. Benson | Enterer: | M. Carrano, P. Mannion, R. Benson |
| Modifier: | G. Varnham | Research group: | vertebrate |
| Created: | 2007-01-25 06:39:07 | Last modified: | 2022-01-28 08:05:18 |
| Access level: | the public | Released: | 2007-01-25 06:39:07 |
| Creative Commons license: | CC BY | ||
Reference information
Primary reference:
| 19734. | 5% 54920 | K. Gao and M. A. Norell. 2000. Taxonomic composition and systematics of Late Cretaceous lizard assemblages from Ukhaa Tolgod and adjacent localities, Mongolian Gobi Desert. Bulletin of the American Museum of Natural History 249:1-118 [J. Alroy/E. Leckey/R. Benson] |
Secondary references:
| 75785 | D. E. Barta and M. A. Norell. 2021. The osteology of Haya griva (Dinosauria: Ornithischia) from the Late Cretaceous of Mongolia. Bulletin of the American Museum of Natural History 445(1):1-112 [P. Mannion/P. Mannion] | |
| 15459 | ETE | D. Dashzeveg, L. Dingus, D.B. Loope, C.C. Swisher, III, T. Dulam and M.R. Sweeney. 2005. New stratigraphic subdivision, depositional environment, and age estimate for the Upper Cretaceous Djadokhta Formation, southern Ulan Nur Basin, Mongolia. American Museum Novitates (3498)1-31 [M. Carrano/K. Maguire/G. Varnham] |
| 14469 | D. Pol and M. A. Norell. 2004. A new gobiosuchid crocodyliform taxon from the Cretaceous of Mongolia. American Museum Novitates 3458:1-31 [M. Carrano/M. Carrano/P. Mannion] | |
| 37019 | D. Pol and M. A. Norell. 2004. A New Crocodyliform from Zos Canyon, Mongolia. American Museum Novitates 3445:1-36 [P. Mannion/P. Mannion/P. Mannion] | |
| 38683 | J. R. Wible, M. J. Novacek, and G. W. Rougier. 2004. New data on the skull and dentition of the Mongolia Late Cretaceous eutherian mammal Zalabdalestes. Bulletin of the American Museum of Natural History 281:1-144 [R. Benson/R. Benson] |