Otog Sumu (bed 5) (Cretaceous of China)

Also known as Otog Qi, Chabu Sumu, Chaibu Sumi, SCDP

Where: Nei Mongol, China (38.9° N, 107.3° E: paleocoordinates 40.0° N, 109.0° E)

• coordinate stated in text

• small collection-level geographic resolution

When: Jingchuan Formation (Zhidan Group), Early/Lower Cretaceous (145.0 - 100.5 Ma)

• "earliest Cretaceous or possible even Late Jurassic in age" when originally assigned to Yijunhuoluo Fm.; now "middle-late Early Cretaceous"

• bed-level stratigraphic resolution

Environment/lithology: fluvial-lacustrine; gray, green, silty sandstone and lithified, lenticular, gray, green mudstone

• "mudstones" (clearly lithified based on preservation of specimen); 30 cm thick bed of grey green silty sandstone with mudstone lenses and cross-bedding.

Size class: macrofossils

Preservation: adpression, soft parts

Reposited in the IVPP

• collected by field crew of the Sino-Canadian Dinosaur Expedition

Primary reference: L. Hou. 1994. [A late Mesozoic bird from Inner Mongolia]. Vertebrata PalAsiatica 32(4):258-266 [R. Benson/R. Benson/M. Carrano]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 85296: authorized by John Alroy, entered by John Alroy on 11.12.2008, edited by Matthew Carrano

Creative Commons license: CC BY (attribution)

Taxonomic list

Reptilia
 Testudines -
"Chelonia indet." = Testudines
"Chelonia indet." = Testudines Batsch 1788 turtle
Aves
 Enantiornithes -
Otogornis genghisi n. gen. n. sp.
Otogornis genghisi n. gen. n. sp. Hou 1994 bird
Reptilia
 Neornithischia - Psittacosauridae
Psittacosaurus sp. Osborn 1923 ornithischian
 Choristodera -
Ikechosaurus sp. Sigogneau-Russell 1981 choristodere