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