Kekeamu cliffs, Ulantatal Valley: Early/Lower Oligocene, China
collected 1988-1989

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Mammalia - Lagomorpha - Leporidae
Desmatolagus sp. Matthew and Granger 1923
Mammalia - Rodentia
? Ctenodactyloidea indet.
    = Ageitonomys neimongolensis n. gen., n. sp. Wang 2010
Wang 2010
IVPP V15913 - holotype
Mammalia - Rodentia - Ctenodactylidae
Karakoromys cf. decessus Matthew and Granger 1923
Mammalia - Rodentia - Cylindrodontidae
Ardynomys sp. Matthew and Granger 1925
IVPP V15910
Mammalia - Rodentia - Aplodontidae
Prosciurus sp. (Matthew 1903)
original and current combination Sciurus (Prosciurus)
Mammalia - Rodentia - Cricetidae
Cricetidae indet. Fischer von Waldheim 1817
Eucricetodon spp.
Mammalia - Rodentia - Dipodidae
Heosminthus sp. Wang 1985
Mammalia - Perissodactyla - Hyracodontidae
Ardynia cf. mongoliensis (Belyaeva 1952)
original and current combination Parahyracodon mongoliensis
Mammalia - Perissodactyla - Chalicotheriidae
Schizotherium cf. avitum Matthew and Granger 1923
Mammalia - Changlelestidae
? Tupaiodon sp. Matthew and Granger 1924
see common names

Geography
Country:China State/province:Nei Mongol County:Alxa Left Banner
Coordinates: 39.2° North, 105.6° East (view map)
Paleocoordinates:39.9° North, 101.6° East
Basis of coordinate:stated in text
Geographic resolution:outcrop
Time
Period:Paleogene Epoch:Oligocene
Stage:Rupelian 10 m.y. bin:Cenozoic 4
Key time interval:Early/Lower Oligocene
Age range of interval:33.90000 - 27.82000 m.y. ago
Stratigraphy
Formation:Ulantatal
Local section:Kekeamu Local bed:1-7
Stratigraphic resolution:formation
Stratigraphy comments: "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
Lithology and environment
Primary lithology: siltstone
Secondary lithology: sandstone
Includes fossils?Y
Includes fossils?Y
Lithology description: "red beds". Legend for geological section indicates clayey sandstone, clayey siltstone, and sand-conglomerate are all fossiliferous.
Environment:terrestrial indet.
Taphonomy
Modes of preservation:body
Size of fossils:macrofossils
Articulated whole bodies:none
Disassociated major elements:some
Disassociated minor elements:some
Collection methods and comments
Collection methods:field collection
Reason for describing collection:taxonomic analysis
Collection dates:1988-1989
Taxonomic list comments:Both "Ctenodactyloidea indet." and "Cricetidae" are listed as "gen. et sp. nov." but no other information is given.
Metadata
Database number:34695
Authorizer:M. Carrano, P. Mannion Enterer:M. Carrano, P. Mannion
Modifier:P. Mannion Research group:vertebrate
Created:2003-09-16 13:24:10 Last modified:2015-11-30 09:12:28
Access level:the public Released:2003-09-16 13:24:10
Creative Commons license:CC BY
Reference information

Primary reference:
9191.5% 19000B.-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]

Secondary references:

57173 B.-Y. Wang. 2010. Ageitonomys neimongolensis gen. et sp. nov. (Ctenodactyloidea, Rodentia, Mammalia) from Early Oligocene of Nei Mongol, China. Vertebrata PalAsiatica 48(1):79-83 [P. Mannion/P. Mannion]
57169 B.-Y. Wang and J. Meng. 2009. Ardynomys (Cylindrodontidae, Rodentia) from Nei Mongol, China. Vertebrata PalAsiatica 47(3):240-244 [P. Mannion/P. Mannion]