Zos, Ukhaa Tolgod (AMNH) (Cretaceous of Mongolia)

Also known as Zos Wash

Where: Omnogov Aimak, Mongolia (43.7° N, 100.9° E: paleocoordinates 40.8° N, 90.4° E)

• coordinate based on nearby landmark

• local area-level geographic resolution

When: Djadokhta Formation, Campanian (83.6 - 72.1 Ma)

• stratigraphically below Ukhaa Tolgod

Environment/lithology: fluvial; red sandstone

Size class: macrofossils

Collected in 1993-1996; reposited in the AMNH

Collection methods: surface (float), surface (in situ), mechanical,

Primary reference: 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]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 68517: authorized by Matthew Carrano, entered by Matthew Carrano on 25.01.2007, edited by Philip Mannion and Roger Benson

Creative Commons license: CC BY (attribution)

Taxonomic list

Reptilia
 Neornithischia - Protoceratopsidae
Protoceratopsidae indet. Granger and Gregory 1923 ornithischian
 Loricata -
Zosuchus davidsoni n. gen. n. sp.2
Zosuchus davidsoni n. gen. n. sp.2 Pol and Norell 2004 crocodilian
 Loricata - Gobiosuchidae
Zaraasuchus shepardi n. gen. n. sp.1
Zaraasuchus shepardi n. gen. n. sp.1 Pol and Norell 2004 crocodilian
IGM 100/1321 - holotype (posterior region of the skull and lower jaws preserved in articulation with cervical vertebrae, osteoderms, and forelimb elements)
 Squamata -
Ctenomastax parva n. gen. n. sp.
Ctenomastax parva n. gen. n. sp. Gao and Norell 2000 lizard
 Squamata - Priscagamidae
Mimeosaurus crassus Gilmore 1943 lizard
IGM 3/76 (MAE 96-105)
 Squamata -
Isodontosaurus gracilis Gilmore 1943 lizard
IGM 3/90
Mammalia
 Tribosphenida - Zalambdalestidae
cf. Zalambdalestes sp.3 Gregory and Simpson 1926 eutherian
PSS-MAE 131, articulated skeleton and skull with attached lower jaws