PBDB Collection

Croc Tooth Quarry (Paleocene of the United States)

Also known as Crocodile Tooth Quarry; Witter Quarry; FG-28

Where: Big Horn County, Wyoming (44.7° N, 108.3° W: paleocoordinates 50.1° N, 89.0° W)

• coordinate estimated from map

• small collection-level geographic resolution

When: Fort Union Formation, Late/Upper Paleocene (58.7 - 55.8 Ma)

• bed-level stratigraphic resolution

Environment/lithology: fluvial-lacustrine; lithified, lenticular siliciclastic sediments

Size classes: macrofossils, mesofossils

Reposited in the UMMP

Collection methods: bulk, quarrying, surface (float), surface (in situ)

Primary reference: R. E. Sloan. 1987. Paleocene and latest Cretaceous mammal ages, biozones, magnetozones, rates of sedimentation, and evolution. Geological Society of America Special Paper 209:165-200 [J. Alroy/J. Alroy/M. Uhen]more details

PaleoDB collection 15018: authorized by John Alroy, entered by John Alroy on 30.04.1994, edited by Patricia Holroyd

Creative Commons license: CC BY (attribution)

Taxonomic list

• said by Archibald et al. 1987 to be Ti4 but not in a measured sectionnot the same as the Witter locality in the Sentinel Butte Fm. of North Dakota (see)same level as Divide Quarry and "clearly overlying" Cedar Point and Jepsen Quarries: Gingerich 1976sec 5 T54N R95W

Show authors, comments, and common names

Mammalia
Multituberculata - Ptilodontidae	Ptilodus kummae⁴ Ptilodus kummae⁴ Krause 1977 multituberculate
Multituberculata - Neoplagiaulacidae	Neoplagiaulax mckennai Neoplagiaulax mckennai Sloan 1987 multituberculate
Multituberculata - Eucosmodontidae	Eucosmodontidae indet.⁵ Eucosmodontidae indet.⁵ Jepsen 1940 multituberculate
Theriamorpha - Phenacodontidae	Phenacodus grangeri⁵, Phenacodus magnus⁵, Ectocion cedrus⁷ Phenacodus grangeri⁵ Simpson 1935 condylarth Phenacodus magnus⁵ Thewissen 1990 condylarth Ectocion cedrus⁷ Thewissen 1990 condylarth
Procreodi - Arctocyonidae	Thryptacodon australis⁵, Lambertocyon eximius¹, Arctocyon sp.⁵, "Arctocyon mumak" = Arctocyon acrogenius⁵ Thryptacodon australis⁵ Simpson 1935 condylarth Lambertocyon eximius¹ Gingerich 1979 condylarth Arctocyon sp.⁵ Blainville 1841 condylarth "Arctocyon small sp." "Arctocyon mumak" = Arctocyon acrogenius⁵ Gazin 1956 condylarth
Theriamorpha - Viverravidae	? Raphictis sp.⁵ ? Raphictis sp.⁵ Gingerich and Winkler 1985 placental
Theriamorpha - Pantolestoidae	cf. Bessoecetor septentrionalis⁵, Bessoecetor pilodontus⁵ cf. Bessoecetor septentrionalis⁵ Russell 1929 placental Bessoecetor pilodontus⁵ Secord 2008 placental
Primates - Plesiadapidae	Chiromyoides caesor n. sp.², Plesiadapis cf. fodinatus⁵, Plesiadapis churchilli³ Chiromyoides caesor n. sp.² Gingerich 1973 primate Plesiadapis cf. fodinatus⁵ Jepsen 1930 primate Plesiadapis churchilli³ Gingerich 1975 primate
Primates - Paromomyidae	Phenacolemur archus⁵, Ignacius frugivorus⁵ Phenacolemur archus⁵ Secord 2008 primate Ignacius frugivorus⁵ Matthew and Granger 1921 primate
Cimolesta - Cyriacotheriidae	Cyriacotherium argyreum⁵ Cyriacotherium argyreum⁵ Rose and Krause 1982 pantodont
Cimolesta - Titanoideidae	Titanoides gidleyi⁶ Titanoides gidleyi⁶ Jepsen 1930 pantodont T. zeuxis said to also possibly be present, but these are considered conspecific by Gingerich 1996
Cimolesta - Barylambdidae	Leptolambda churchilli⁵, Haplolambda cf. quinni⁵ Leptolambda churchilli⁵ Gingerich and Childress 1983 pantodont Haplolambda cf. quinni⁵ Patterson 1939 pantodont

¹Alroy 2002; ²Gingerich 1973; ³Gingerich 1976; ⁴Gunnell 1994; ⁵Secord 2008; ⁶Simons 1960; ⁷Thewissen 1990