Twin Creeks (Paleocene of the United States)

Also known as Twin Creek Forks

Where: Lincoln County, Wyoming (41.8° N, 110.7° W: paleocoordinates 48.0° N, 91.4° W)

• coordinate based on political unit

When: Evanston Formation, Tiffanian (61.7 - 56.8 Ma)

Environment/lithology: terrestrial

Primary reference: D. E. Russell. 1967. Le Paleocene continental d'Amerique du nord. Memoires du Museum National d'Histoire Naturelle. Serie C., Sciences de la Terre 16(2):37-99 [J. Alroy/J. Alroy]more details

PaleoDB collection 14999: authorized by John Alroy, entered by John Alroy on 18.02.1993

Creative Commons license: CC BY (attribution)

Taxonomic list

Mammalia
 Primates - Microsyopidae
Navajovius kohlhaasae3 Matthew and Granger 1921 primate
 Primates - Plesiadapidae
Plesiadapis rex2 Gidley 1923 primate
 Ungulata -
 Tribosphenida - Phenacodontidae
Ectocion cf. collinus1 Russell 1929 condylarth
Phenacodus sp. Cope 1873 condylarth
 Carnivora - Miacidae
Miacidae indet.1 Cope 1880 carnivoran
 Macroscelidea - Apheliscidae
Haplaletes cf. pelicatus Gazin 1956 elephant shrew
? Litomylus ishami n. sp. Gazin 1956 elephant shrew
USNM 21263
 Tribosphenida - Arctocyonidae
? Arctocyon cf. ferox Cope 1883 condylarth
assigned to "Claenodon" by Gazin
Thryptacodon cf. australis Simpson 1935 condylarth
 Multituberculata - Ptilodontidae
cf. Ptilodus sp. Cope 1881 multituberculate
apparently P. sp. "C" because this is listed by Gunnell 1994