Ledge (Paleocene of the United States)

Also known as CM loc. 1035; Ridge Locality

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 14964: authorized by John Alroy, entered by John Alroy on 27.09.1993, edited by Matthew Carrano

Creative Commons license: CC BY (attribution)

Taxonomic list

• "Plesiadapis jepseni" is NOT present: Gingerich 1976
Mammalia
 Cimolesta - Pantolambdidae
cf. Caenolambda pattersoni Gazin 1956 pantodont
 Primates - Plesiadapidae
Plesiadapis rex3, "Plesiadapis jepseni n. sp." = Plesiadapis anceps, "Pronothodectes simpsoni n. sp." = Nannodectes simpsoni
Plesiadapis rex3 Gidley 1923 primate
"Plesiadapis jepseni n. sp." = Plesiadapis anceps Simpson 1936 primate
"Pronothodectes simpsoni n. sp." = Nannodectes simpsoni Gazin 1956 primate
USNM 20754
 Primates - Carpolestidae
 Condylarthra - Hyopsodontidae
cf. Promioclaenus pipiringosi Gazin 1956 condylarth
 Tribosphenida - Phenacodontidae
Ectocion collinus1 Russell 1929 condylarth
? Phenacodus bisonensis Gazin 1956 condylarth
Phenacodus grangeri4 Simpson 1935 condylarth
"large" Phenacodus
 Macroscelidea - Apheliscidae
"Litomylus scaphiscus n. sp." = Litomylus dissentaneus, Litomylus scaphicus
"Litomylus scaphiscus n. sp." = Litomylus dissentaneus Simpson 1935 elephant shrew
USNM 21011-11
Litomylus scaphicus Gazin 1956 elephant shrew
 Tribosphenida - Arctocyonidae
"Tricentes fremontensis" = Mimotricentes fremontensis, "Thryptacodon demari n. sp." = Thryptacodon orthogonius, "Claenodon acrogenius" = Mentoclaenodon acrogenius
"Tricentes fremontensis" = Mimotricentes fremontensis Gazin 1956 condylarth
"Thryptacodon demari n. sp." = Thryptacodon orthogonius Russell 1929 condylarth
"Claenodon acrogenius" = Mentoclaenodon acrogenius Gazin 1956 condylarth
 Acreodi - Mesonychidae
Dissacus sp. Cope 1881 condylarth