Nom Khong Obo (Oligocene of China)

Also known as Nom Khong Shireh; Holy Mesa; Naomugen

Where: Nei Mongol, China (42.0° N, 111.5° E: paleocoordinates 42.8° N, 107.5° E)

• coordinate based on nearby landmark

• small collection-level geographic resolution

When: Naogangdai Formation, Early/Lower Oligocene (33.9 - 28.4 Ma)

• Upper Naogangdai Formation; top bed of what has in the past been considered the Baron Sog Formation

• bed-level stratigraphic resolution

Environment/lithology: terrestrial; white, yellow sandstone and gravel

• cross bedded white and yellow sand and gravel with intercalated lenses of clay

Size class: macrofossils

Collected by Central Asiatic Expedition in 1928; reposited in the AMNH

Primary reference: B.-Y. Wang. 2003. Oligocene rodents from the Nomogen ( =Nom Khong) Area of Nei Mongol, China, and comments on related stratigraphy. Vertebrata PalAsiatica 41(3):211-219 [P. Mannion/P. Mannion]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 176066: authorized by Philip Mannion, entered by Philip Mannion on 25.01.2016

Creative Commons license: CC BY (attribution)

Taxonomic list

 Rodentia - Bathyergidae
Tsaganomys altaicus Matthew and Granger 1923 mole rat
AMNH 26185
Cyclomylus intermedius Wang 2001 mole rat
AMNH 26186 and 26187
 Perissodactyla - Paraceratheriidae
Paraceratherium transouralicum odd-toed ungulate
AMNH 26168, 26169, 26172 and 26189
Paraceratherium grangeri Osborn 1923 odd-toed ungulate
AMNH 26166 and 26179
 Perissodactyla - Hyracodontidae
Ardynia kazachstanensis odd-toed ungulate
AMNH 26183
 Artiodactyla - Entelodontidae
Entelodon gobiensis Trofimov 1952 even-toed ungulate
AMNH 26184