Carrot Top Quarry (Miocene of the United States)

Also known as UNSM Bw-107

Where: Brown County, Nebraska (42.7° N, 100.0° W: paleocoordinates 43.3° N, 96.7° W)

• coordinate based on political unit

• small collection-level geographic resolution

When: Cornell Dam Member (Valentine Formation), Barstovian (16.3 - 12.5 Ma)

• bed-level stratigraphic resolution

Environment/lithology: terrestrial; lithology not reported

Size classes: macrofossils, mesofossils

Reposited in the UNSM

Primary reference: M. R. Voorhies. 1990. Vertebrate paleontology of the proposed Norden Reservoir Area, Brown, Cherry and Keya Paha counties, Nebraska. Technical Report, Division of Archeological Research, Department of Anthropology, University of Nebraska 82-09 [J. Alroy/J. Alroy/J. Alroy]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 18090: authorized by John Alroy, entered by John Alroy on 05.08.1992

Creative Commons license: CC BY (attribution)

Taxonomic list

• NISP of 1373 includes at least 53 non-mammalian specimens, yielding an estimate of 1320; Skinner and Johnson 1984 report "about 750" based on early collections
Mammalia
 Proboscidea - Gomphotheriidae
Gomphotherium sp.2 Burmeister 1837 gomphothere
 Chiroptera - Vespertilionidae
Vespertilionidae indet.2 Gray 1821 vesper bat
 Perissodactyla - Equidae
Merychippus insignis2 Leidy 1856 horse
Protohippus sp.2 Leidy 1858 horse
said to be a new species; less hypsodont, more complex fossettes than P. perditus
Calippus proplacidus1 Osborn 1918 horse
Hipparionini indet.1 Quinn 1955 hipparionine horse
Hypohippus osborni2 Gidley 1907 anchitheriine horse
cf. Parahippus cognatus2 Leidy 1858 anchitheriine horse
 Perissodactyla - Rhinocerotidae
Teleoceras sp.1 Hatcher 1894 rhinoceros
Peraceras superciliosum1 Cope 1880 rhinoceros
Aphelops megalodus2 Cope 1873 rhinoceros
 Artiodactyla - Antilocapridae
Merycodus cf. necatus2 Leidy 1854 pronghorn
 Artiodactyla - Moschidae
Blastomeryx gemmifer2 Cope 1874 musk deer
 Artiodactyla - Camelidae
cf. Miolabis sp.2 Hay 1899 camel
Procamelus occidentalis2 Leidy 1858 camel
Aepycamelus robustus2 Leidy 1858 camel
 Artiodactyla - Tayassuidae
Tayassuidae indet.2 Palmer 1897 peccary
 Carnivora - Mustelidae
Leptarctus primus2 Leidy 1856 mustelid carnivore
 Carnivora - Amphicyonidae
Amphicyonidae indet.2 Haeckel 1886 bear-dog
 Carnivora - Canidae
Aelurodon cf. ferox1 Leidy 1858 bone-crushing dog
 Theriamorpha - Talpidae
 Theriamorpha - Erinaceidae
Metechinus amplior2 Rich 1981 hedgehog
Parvericius montanus2 Koerner 1940 hedgehog
Untermannerix copiosus2 Rich 1981 hedgehog
 Lagomorpha - Leporidae
 Rodentia - Sciuridae
"Tamiini indet." = Marmotini1
"Tamiini indet." = Marmotini1 squirrel
 Rodentia - Heteromyidae
Cupidinimus nebraskensis2 Wood 1935 rodent
Mioheteromys sp.1 Korth 1997 rodent
 Rodentia - Castoridae
Eucastor tortus2 Leidy 1858 beaver
Monosaulax curtus1 Matthew and Cook 1909 beaver
 Rodentia - Zapodidae
Megasminthus tiheni2 Klingener 1966 jumping mouse
 Rodentia - Cricetidae
"Copemys cf. niobrariensis" = Copemys longidens2
"Copemys cf. niobrariensis" = Copemys longidens2 Hall 1930 mouse