Knife Edge/Primate Knoll (Eocene of the United States)

Also known as 4 Points Hill (in part); UCM 78016

Where: Garfield County, Colorado (39.7° N, 107.6° W: paleocoordinates 44.5° N, 91.6° W)

• coordinate based on political unit

When: DeBeque Formation, Wasatchian (55.8 - 50.3 Ma)

• said to be middle Wasatchian

Environment/lithology: terrestrial

Primary reference: A. J. Kihm. 1984. Early Eocene Mammalian Fauna of the Piceance Creek Basin. Northwestern Colorado. [J. Alroy/J. Alroy/M. Uhen]more details

PaleoDB collection 15377: authorized by John Alroy, entered by John Alroy on 27.09.1993

Creative Commons license: CC BY (attribution)

Taxonomic list

• specimen of "D. cf. chacensis" could be either Simpsonodus or Bunophorus
Show authors, comments, and common names
Mammalia
 Condylarthra - Hyopsodontidae
Hyopsodus sp.1, Hyopsodus lysitensis5
Hyopsodus sp.1 Leidy 1870 condylarth
Hyopsodus lysitensis5 Gingerich 1974 condylarth
 Theriamorpha - Phenacodontidae
Phenacodus sp.1
Phenacodus sp.1 Cope 1873 condylarth
 Perissodactyla - Palaeotheriidae
Hyracotherium sp.
Hyracotherium sp. Owen 1841 odd-toed ungulate
"C"
 Artiodactyla - Diacodexeidae
Diacodexis cf. metsiacus4
Diacodexis cf. metsiacus4 Cope 1882 even-toed ungulate
 Creodonta - Oxyaenidae
Oxyaena intermedia3
Oxyaena intermedia3 Denison 1938 creodont
 Creodonta - Hyaenodontidae
Prototomus cf. martis2
Prototomus cf. martis2 Gingerich and Deutsch 1989 creodont
 Rodentia - Ischyromyidae
Acritoparamys pattersoni1, Paramys copei
Acritoparamys pattersoni1 Wood 1962 rodent
Paramys copei Loomis 1907 rodent
 Primates - Notharctidae
Cantius abditus
Cantius abditus Gingerich and Simons 1977 primate
 Primates - Microsyopidae
Microsyops cf. latidens
Microsyops cf. latidens Cope 1882 primate
1Alroy 2002; 2Gunnell 1998; 3Gunnell and Gingerich 1991; 4Krishtalka and Stucky 1986; 5Redline 1997