Red Mesa, Artsa Bogdo (AMNH Loc. 11492) (Cretaceous of Mongolia)

Also known as Oshih Basin, Oosh Basin

Where: Ovorkhangai, Mongolia (44.2° N, 102.7° E: paleocoordinates 45.0° N, 103.3° E)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Öösh Formation, Early/Lower Cretaceous (145.0 - 100.5 Ma)

• originally Ondai Sair Fm.; also called Oshih Fm. = Tevsh Fm.; assigned to the Khukhtekskaya (Hüteeg Svita)

•"Although the age remains somewhat uncertain, correlated exposures that appear to be of the same age have been dated at around 130 Ma (Samiolov et al., 1988; Watabe and Suzuki, 2000; Rougier et al., 2001; Prieto-Marquez et al., 2012)" (Conrad and Daza 2015).

• bed-level stratigraphic resolution

Environment/lithology: terrestrial; lithology not reported

Size classes: macrofossils, mesofossils

Collected by W. Granger, Wong in 1922-1923; reposited in the AMNH

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

Primary reference: H. F. Osborn. 1924. Sauropoda and Theropoda from the Lower Cretaceous of Mongolia. American Museum Novitates 128:1-7 [M. Carrano/M. Carrano/M. Carrano]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 48937: authorized by Matthew Carrano, entered by Matthew Carrano on 04.04.2005, edited by Roger Benson and Philip Mannion

Creative Commons license: CC BY (attribution)

Taxonomic list

Reptilia
 Saurischia -
Asiatosaurus mongoliensis n. gen. n. sp., Prodeinodon mongoliense n. gen. n. sp.
Asiatosaurus mongoliensis n. gen. n. sp. Osborn 1924 sauropod
AMNH 6264 (tooth)
Prodeinodon mongoliense n. gen. n. sp. Osborn 1924 tetanuran
 Neornithischia - Psittacosauridae
Psittacosaurus sp.1 Osborn 1923 ornithischian
Psittacosaurus mongoliensis1 Osborn 1923 ornithischian
baby skulls (AMNH 6535, 6536)
 Squamata -
Norellius nyctisaurops n. gen. n. sp.2
Norellius nyctisaurops n. gen. n. sp.2 Conrad and Daza 2015 lizard
AMNH FR 21444 (skull)