Houldjin Gravels (1930 AMNH) (Eocene of China)

Where: Nei Mongol, China (43.7° N, 112.0° E: paleocoordinates 45.1° N, 107.3° E)

• coordinate based on nearby landmark

When: Houldjinian (37.2 - 33.9 Ma)

• "mid-Oligocene"; presumably Houldjinian

Environment/lithology: terrestrial; gravel

• "gravels"

Size class: macrofossils

Collected by Chinese Assistant Chih, Central Asiatic Expedition in 1930; reposited in the AMNH

Primary reference: H. F. Osborn and W. Granger. 1932. Coryphodonts and uintatheres from the Mongolian expedition of 1930. American Museum Novitates 552:1-16 [J. Alroy/J. Alroy]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 72182: authorized by John Alroy, entered by John Alroy on 26.05.2007, edited by Patricia Holroyd and Evangelos Vlachos

Creative Commons license: CC BY (attribution)

Taxonomic list

Reptilia
 Testudines - Trionychidae
"Amyda gregaria n. sp." = Trionyx gregarius2, "Rafetus gilmorei n. sp." = Trionyx gregarius1
"Amyda gregaria n. sp." = Trionyx gregarius2 Gilmore 1934 softshell turtle
"Rafetus gilmorei n. sp." = Trionyx gregarius1 Gilmore 1934 softshell turtle
AMNH 6736 and AMNH 6737 (syntypes), two complete skeletons
Mammalia
 Cimolesta - Coryphodontidae
Hypercoryphodon thomsoni n. gen. n. sp.
Hypercoryphodon thomsoni n. gen. n. sp. Osborn and Granger 1932 pantodont