West End (Paleocene of the United States)

Where: Fremont County, Wyoming (43.2° N, 108.2° W: paleocoordinates 49.0° N, 88.2° W)

• coordinate based on political unit

When: Tiffanian (61.7 - 56.8 Ma)

Environment/lithology: terrestrial

Primary reference: C. L. Gazin. 1956. Palaeocene mammalian faunas of the Bison Basin in south-central Wyoming. Smithsonian Miscellaneous Collections 131(6):1-57 [J. Alroy/J. Alroy/M. Carrano]more details

PaleoDB collection 15001: authorized by John Alroy, entered by John Alroy on 27.09.1993

Creative Commons license: CC BY (attribution)

Taxonomic list

 Pantodonta -
 Primates - Plesiadapidae
Plesiadapis rex2 Gidley 1923 primate
Nannodectes simpsoni2 Gazin 1956 primate
presumably = "Plesiadapis jepseni" (see discussion)
 Tribosphenida - Phenacodontidae
"Gidleyina wyomingensis n. sp." = Ectocion collinus, Phenacodus grangeri4
"Gidleyina wyomingensis n. sp." = Ectocion collinus Russell 1929 condylarth
Phenacodus grangeri4 Simpson 1935 condylarth
large "? P. sp."
 Macroscelidea -
"Litolestes lacunatus" = Litocherus lacunatus
"Litolestes lacunatus" = Litocherus lacunatus Gazin 1956 elephant shrew
 Tribosphenida - Arctocyonidae
Mimotricentes fremontensis3 Gazin 1956 condylarth
Arctocyon cf. ferox1 Cope 1883 condylarth
"Thryptacodon demari" = Thryptacodon orthogonius Russell 1929 condylarth
includes "T. belli"
Thryptacodon cf. australis Simpson 1935 condylarth
Chriacus pelvidens Cope 1881 condylarth