Borchers ( of the United States)

Also known as KU-MEA-009; Locality 9

Where: Meade County, Kansas (37.2° N, 100.3° W: paleocoordinates 37.3° N, 99.7° W)

• coordinate based on political unit

When: Atwater Member (Crooked Creek Formation), Blancan (4.9 - 1.8 Ma)

Environment/lithology: terrestrial

• Goodwin and Hayes 1994: Specimens were collected from a weathered ash and silt layer 1.22 m thick overlying a bedded volcanic ash.

Size classes: macrofossils, mesofossils

Primary reference: C. W. Hibbard. 1970. in Dort and Jones [J. Alroy/J. Alroy]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 19927: authorized by John Alroy, entered by John Alroy on 18.02.1993

Creative Commons license: CC BY (attribution)

Taxonomic list

• originally reported by Hibbard 1941d
sec 21 T 33 S R 28 W
overlies Pearlette type "B" ash, dated at 1.96 (= 2.01) +/- 0.05 Ma (KA on sanidine) by Naeser et al. 1973
Reptilia
 Squamata - Colubridae
Elaphe cf. obsoleta2 Say 1823 black rat snake
Coluber constrictor2 Linnaeus 1758 black racer
Lampropeltis doliata2 colubrid snake
Lampropeltis getulus2 Linnaeus 1766 kingsnake
Pituophis catenifer2 gopher snake
? Rhinocheilus lecontei2 colubrid snake
Heterodon nasicus2 Baird and Girard 1852 western hognose snake
 Squamata - Crotalidae
Sistrurus catenatus2 pigmy rattlesnake
Crotalus viridis2 rattlesnake
Mammalia
 Rodentia - Cricetidae
Reithrodontomys pratincola n. sp. Hibbard 1941 harvest mouse
see Hibbard 1941d
Sigmodon minor1 Gidley 1922 cotton rat
Neotoma taylori n. sp. Hibbard 1967 pack rat
see Hibbard 1967
Ondatra cf. idahoensis Wilson 1933 muskrat
described as "Pliopotamys" by Hibbard 1956, see Hibbard 1959
Mictomys vetus1 Wilson 1933 bog lemming
Onychomys hollisteri n. sp.3 Carleton and Eshelman 1979 grasshopper mouse
Onychomys pedroensis Gidley 1922 grasshopper mouse
includes type of "O. fossilis" of Hibbard 1941d
 Rodentia - Sciuridae
Spermophilus "sp. morph B"5 Cuvier 1825 ground squirrel
"morph A"
Spermophilus "sp. morph A"5 Cuvier 1825 ground squirrel
"morph B"
Spermophilus cragini n. sp. Hibbard 1941 ground squirrel
see Hibbard 1941d
Spermophilus meadensis n. sp. Hibbard 1941 ground squirrel
see Hibbard 1941d
 Rodentia - Geomyidae
Geomys sp. Rafinesque 1817 pocket gopher
 Rodentia - Heteromyidae
Dipodomys hibbardi n. sp.8 Zakrzewski 1981 kangaroo rat
Prodipodomys tiheni1 Hibbard 1943 rodent
Perognathus gidleyi Hibbard 1941 pocket mouse
Perognathus pearlettensis n. sp. Hibbard 1941 pocket mouse
see Hibbard 1941d
 Rodentia - Zapodidae
Zapus burti n. sp.
Zapus burti n. sp. Hibbard 1941 jumping mouse
see Hibbard 1941d
 Lagomorpha - Leporidae
Lepus cf. californicus Gray 1837 black-tailed jackrabbit
confirmed by White 1991a; includes "Nekrolagus" according to Hibbard 1963a
Alilepus hibbardi7 White 1991 rabbit
 Perissodactyla - Equidae
Equus cf. giganteus Gidley 1901 horse
 Tribosphenida - Soricidae
Sorex taylori Hibbard 1937 long-tailed shrew
 Carnivora - Mephitidae
Spilogale putorius Linnaeus 1758 eastern spotted skunk
 Carnivora - Mustelidae
Mustela cf. frenata4 Lichtenstein 1831 long-tailed weasel
 Carnivora - Canidae
Canis cf. latrans4 Say 1823 coyote
Urocyon cinereoargenteus1 Schreber 1775 gray fox
 Carnivora - Felidae
Lynx sp.1 Kerr 1792 lynx
 Ungulata - Tayassuidae
Platygonus sp. Leconte 1848 peccary
 Ungulata - Camelidae
Camelops sp. Leidy 1854 camel
Hemiauchenia sp.6 Gervais and Ameghino 1880 camel
 Ungulata - Antilocapridae
Antilocapridae indet. Gray 1866 pronghorn