Urtyn Obo "Middle White" or "Gray" Beds (Eocene of China)

Also known as Aliusu; Baluchithere Camp; East Mesa; Erden Obo

Where: Nei Mongol, China (42.6° N, 111.3° E: paleocoordinates 43.6° N, 106.3° E)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Ulan Gocho Formation, Ulangochuian (37.2 - 33.9 Ma)

• thought to be younger than the Irdin Manha, Shara Murun, and Ardyn Obo, and older than the Houldjin, Hsanda Gol, and Baron Sog

• member-level stratigraphic resolution

Environment/lithology: terrestrial; gray, white siliciclastic sediments

• none given, other than white, gray, or pink beds

Size class: macrofossils

Collected in 1928; reposited in the AMNH, IVPP

Primary reference: H. F. Osborn. 1929. Embolotherium, gen. nov., of the Ulan Gochu, Mongolia. American Museum Novitates 353:1-20 [J. Alroy/J. Alroy]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 73810: authorized by John Alroy, entered by John Alroy on 30.06.2007, edited by Philip Mannion

Creative Commons license: CC BY (attribution)

Taxonomic list

Mammalia
 Perissodactyla - Brontotheriidae
Embolotherium andrewsi n. gen. n. sp.
Embolotherium andrewsi n. gen. n. sp. Osborn 1929 brontothere
AMNH 26001
 Perissodactyla - Eggysodontidae
Proeggysodon qiui n. gen. n. sp.1
Proeggysodon qiui n. gen. n. sp.1 Bai and Wang 2012 odd-toed ungulate
IVPP V 18099 - holotype
 Perissodactyla - Amynodontidae
Zaisanamynodon borisovi2 Belyaeva 1971 odd-toed ungulate
AMNH 26034
 Perissodactyla - Paraceratheriidae
Urtinotherium intermedium3 Chiu 1962 odd-toed ungulate
AMNH 26026