Kekeamu cliffs, Ulantatal Valley (Oligocene of China)

Where: Nei Mongol, China (39.2° N, 105.6° E: paleocoordinates 39.9° N, 101.6° E)

• coordinate stated in text

• outcrop-level geographic resolution

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

• "lower red beds" equivalent to "lower part" of formation; beds 1-7 from bottom on section (Fig. 2). Stated as "early medial Oligocene"

•JA: the traditional terrestrial "middle Oligocene" is equivalent to the modern marine early Oligocene

• formation-level stratigraphic resolution

Environment/lithology: terrestrial; siltstone and sandstone

• "red beds". Legend for geological section indicates clayey sandstone, clayey siltstone, and sand-conglomerate are all fossiliferous.

Size class: macrofossils

Collected in 1988-1989

Primary reference: B.-Y. Wang and P.-Y. Wang. 1991. Discovery of early medial Oligocene mammalian fauna from Kekeamu, Alxa Left Banner, Nei Mongol. Vertebrata PalAsiatica 29(1):64-71 [M. Carrano/M. Carrano/P. Mannion]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 34695: authorized by Matthew Carrano, entered by Matthew Carrano on 16.09.2003, edited by Philip Mannion

Creative Commons license: CC BY (attribution)

Taxonomic list

• Both "Ctenodactyloidea indet." and "Cricetidae" are listed as "gen. et sp. nov." but no other information is given.
Mammalia
 Rodentia - Cricetidae
Cricetidae indet. Fischer von Waldheim 1817 mouse
Eucricetodon spp. Thaler 1966 mouse
 Rodentia - Dipodidae
Heosminthus sp. Wang 1985 rodent
 Rodentia - Aplodontidae
Prosciurus sp. Matthew 1903 mountain beaver
 Rodentia -
Ageitonomys neimongolensis n. gen. n. sp. Wang 2010 rodent
 Rodentia - Ctenodactylidae
Karakoromys cf. decessus Matthew and Granger 1923 gundi
 Rodentia - Cylindrodontidae
Ardynomys sp. Matthew and Granger 1925 rodent
IVPP V15910
 Lagomorpha - Leporidae
Desmatolagus sp. Matthew and Granger 1923 rabbit
 Perissodactyla - Chalicotheriidae
Schizotherium cf. avitum Matthew and Granger 1923 chalicothere
 Perissodactyla - Hyracodontidae
Ardynia cf. mongoliensis Belyaeva 1952 odd-toed ungulate
 Tribosphenida - Changlelestidae
? Tupaiodon sp. Matthew and Granger 1924 placental