The Pit (Pleistocene of the United States)

Also known as CM loc. 1925

Where: Park County, Colorado (39.3° N, 105.7° W: paleocoordinates 39.3° N, 105.5° W)

• coordinate based on political unit

• small collection-level geographic resolution

When: Irvingtonian (1.8 - 0.3 Ma)

Environment/lithology: terrestrial

Size classes: macrofossils, mesofossils

Primary reference: A. D. Barnosky and D. L. Rasmussen. 1988. Middle Pleistocene arvicoline rodents and environmental change at 2900-meters elevation, Porcupine Cave, South Park, Colorado. Annals of Carnegie Museum 57(12):267-292 [J. Alroy/J. Alroy/M. Uhen]more details

PaleoDB collection 20477: authorized by John Alroy, entered by John Alroy on 19.05.2000

Creative Commons license: CC BY (attribution)

Taxonomic list

• "Porcupine Cave," exact locality unclear: Clethrionomys sp. Barnosky and Bell 1994 "Spermophilus armatus or richardsoni" Wood and Barnosky 1994 Cynomys gunnisoni Goodwin 1999 "probably" Cynonymys new species Goodwin 1999
"Mustela vison" omitted by Anderson 1996
Mammalia
 Rodentia - Cricetidae
Neotoma sp. Say and Ord 1825 pack rat
small
Neotoma cinerea Ord 1815 bushy-tailed woodrat
Ondatra sp.4 Link 1795 muskrat
levels 1, 2, 4, 5, 8A; "O. cf. annectens"
Phenacomys cf. gryci3 Repenning 1987 vole
Mimomys cf. virginianus4 Repenning and Grady 1988 vole
levels 4, 5, 6, 7, 8A, 10
Allophaiomys pliocaenicus4 Kormos 1932 vole
levels 4, 5, 6, 7, 8A, 11
Microtus paroperarius Hibbard 1944 vole
levels 1, 2, 3, 4, 5, 7: Bell and Barnosky 2000; includes "Microtus montanus or M. longicaudus" according to Bell and Barnosky 2000
"Terricola meadensis" = Microtus meadensis1 Hibbard 1944 vole
Lemmiscus curtatus1 Cope 1868 sagebrush vole
Mictomys meltoni Paulson 1961 bog lemming
levels 1, 2, 3, 4, 5, 6, 7, 8, 8A, 9, 10, 11, 12: Bell and Barnosky 2000
 Rodentia - Sciuridae
Sciurus sp. Linnaeus 1758 squirrel
Spermophilus cf. elegans6 Kennicott 1863 Wyoming ground squirrel
Spermophilus lateralis5 Say 1823 golden-mantled ground squirrel
Marmota cf. flaviventris5 Audubon and Bachman 1841 yellow-bellied marmot
Cynomys sp. Rafinesque 1817 prairie dog
"Neotamias cf. minimus" = Eutamias minimus5 Bachman 1839 least chipmunk
Tamiasciurus hudsonicus5 Erxleben 1777 American red squirrel
 Rodentia - Geomyidae
Thomomys sp. Wied-Neuwied 1839 pocket gopher
 Rodentia - Erethizontidae
Erethizon sp. Cuvier 1822 North American porcupine
 Lagomorpha - Leporidae
Sylvilagus audubonii8 Baird 1858 desert cottontail
Lepus townsendii8 Bachman 1839 white-tailed jackrabbit
Brachylagus coloradoensis8 Ramos 1999 pygmy rabbit
 Lagomorpha - Ochotonidae
Ochotona cf. princeps Richardson 1828 American pika
 Perissodactyla - Equidae
Equus sp. Linnaeus 1758 horse
 Tribosphenida - Soricidae
Soricidae indet. Fischer 1814 shrew
 Chiroptera -
Chiroptera indet. Blumenbach 1779 bat
a bat
 Carnivora - Mephitidae
Spilogale putorius2 Linnaeus 1758 eastern spotted skunk
Mephitis mephitis2 Schreber 1776 striped skunk
 Carnivora - Mustelidae
Lontra cf. canadensis2 Schreber 1776 North American river otter
Mustela sp.2 Linnaeus 1758 weasel
Mustela frenata Lichtenstein 1831 long-tailed weasel
Mustela erminea2 Linnaeus 1758 stoat
Mustela cf. nigripes Audubon and Bachman 1851 black-footed ferret
Brachyprotoma obtusata2 Cope 1899 short-faced skunk
Taxidea taxus Schreber 1778 American badger
 Carnivora - Canidae
Vulpes cf. vulpes2 Linnaeus 1758 red fox
Vulpes velox2 Say 1823 swift fox
Canis latrans Say 1823 coyote
Urocyon cinereoargenteus2 Schreber 1775 gray fox
 Carnivora - Felidae
Felidae indet. Gray 1821 cat
"possibly Acinonyx"
 Ungulata - Camelidae
Camelops sp. Leidy 1854 camel
 Ungulata - Bovidae
cf. Oreamnos harringtoni7 Stock 1936 mountain goat
The Pit, level 2
Ovis cf. canadensis Shaw 1804 bighorn sheep
 Ungulata - Cervidae
Cervus elaphus1 Linnaeus 1758 red deer
Odocoileus sp. Rafinesque 1832 New World deer
 Ungulata - Antilocapridae
Antilocapra sp. Ord 1818 pronghorn