Where: Nei Mongol, China (39.2° N, 105.6° E)
• Paleocoordinates: 37.0° N, 102.6° E (Wright 2013)
• 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
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: CC0 (CC0)
Taxonomic list
Mammalia | |
Desmatolagus sp. Matthew and Granger 1923 rabbit | |
| |
Prosciurus sp. Matthew 1903 mountain beaver | |
Heosminthus sp. Wang 1985 rodent | |
Cricetidae indet. Fischer von Waldheim 1817 rodent
Eucricetodon spp. Thaler 1966 rodent | |
Ageitonomys neimongolensis n. gen. n. sp.
Ageitonomys neimongolensis n. gen. n. sp. Wang 2010 rodent | |
Karakoromys cf. decessus Matthew and Granger 1923 gundi | |
Schizotherium cf. avitum Matthew and Granger 1923 chalicothere | |
Ardynia cf. mongoliensis Belyaeva 1952 odd-toed ungulate | |
? Tupaiodon sp. Matthew and Granger 1924 placental |