The Amphitheater (Eocene of the United States)

Also known as FMNH 109-41

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

• coordinate based on political unit

• small collection-level geographic resolution

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

• said to be middle Wasatchian

Environment/lithology: terrestrial

Reposited in the FMNH

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 15310: authorized by John Alroy, entered by John Alroy on 27.09.1993

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Mammalia
 Primates - Notharctidae
Cantius frugivorus1
Cantius frugivorus1 Cope 1875 primate
 Rodentia - Ischyromyidae
Mytonomys coloradensis1
Mytonomys coloradensis1 Wood 1962 rodent
 Perissodactyla - Palaeotheriidae
Hyracotherium sp.
Hyracotherium sp. Owen 1841 odd-toed ungulate
"C" and "E"
 Artiodactyla - Diacodexeidae
Bunophorus pattersoni2
Bunophorus pattersoni2 Krishtalka and Stucky 1986 even-toed ungulate
 Condylarthra - Hyopsodontidae
Hyopsodus powellianus, Hyopsodus lysitensis3
Hyopsodus powellianus Cope 1884 condylarth
Hyopsodus lysitensis3 Gingerich 1974 condylarth
 Cimolesta - Esthonychidae
Esthonyx bisulcatus
Esthonyx bisulcatus Cope 1874 tillodont
from "109-47" (presumably a lapsus)
 Cimolesta - Coryphodontidae
Coryphodon sp.
Coryphodon sp. Owen 1845 pantodont
 Theriamorpha - Leptictidae
Palaeictops cf. bicuspis
Palaeictops cf. bicuspis Cope 1880 eutherian
1Alroy 2002; 2Krishtalka and Stucky 1986; 3Redline 1997