Twin Creeks (Paleocene of the United States)

Also known as Twin Creek Forks

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

• Paleocoordinates: 51.3° N, 79.7° W (Wright 2013)

• 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: CC0 (CC0)

Taxonomic list

Show authors, comments, and common names
Mammalia
 Multituberculata - Ptilodontidae
cf. Ptilodus sp.
cf. Ptilodus sp. Cope 1881 multituberculate
apparently P. sp. "C" because this is listed by Gunnell 1994
 Pantodonta -
Pantodonta indet.
 Carnivora - Miacidae
Miacidae indet.1
Miacidae indet.1 Cope 1880 carnivoran
 Tribosphenida - Phenacodontidae
Phenacodus sp., Ectocion cf. collinus1
Phenacodus sp. Cope 1873 condylarth
Ectocion cf. collinus1 Russell 1929 condylarth
 Procreodi - Arctocyonidae
? Arctocyon cf. ferox, Thryptacodon cf. australis
? Arctocyon cf. ferox Cope 1883 condylarth
assigned to "Claenodon" by Gazin
Thryptacodon cf. australis Simpson 1935 condylarth
 Primates - Microsyopidae
Navajovius kohlhaasae3
Navajovius kohlhaasae3 Matthew and Granger 1921 primate
 Primates - Plesiadapidae
Plesiadapis rex2
Plesiadapis rex2 Gidley 1923 primate
 Macroscelidea - Apheliscidae
Haplaletes cf. pelicatus, ? Litomylus ishami n. sp.
Haplaletes cf. pelicatus Gazin 1956 elephant shrew
? Litomylus ishami n. sp. Gazin 1956 elephant shrew
USNM 21263
1Alroy 2002; 2Gingerich 1976; 3Gunnell 1989