Little Jacks Creek (Neogene to of the United States)

Where: Owyhee County, Idaho (42.8° N, 115.9° W: paleocoordinates 43.2° N, 114.2° W)

• coordinate estimated from map

When: Chalk Hills Formation (Idaho Group), early Early Hemphillian to early Early Hemphillian (10.3 - 4.9 Ma)

Environment/lithology: lacustrine; siltstone and sandy conglomerate

Size classes: macrofossils, mesofossils

Preservation: permineralized

Collection methods: Idaho Museum of Natural History collection

Primary reference: R. A. Rapp. 2006. Owyhee bones: Hemphillian (latest Miocene) Little Jacks Creek (LJC) and Sugar Creek (SC) terrestrial local faunas of the western Snake River Plain, Owyhee County, Idaho. Idaho State University i-397 [J. Orcutt/J. Orcutt/J. Orcutt]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 218109: authorized by John Orcutt, entered by John Orcutt on 18.02.2021

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Amphibia
 Salientia -
Anura indet.
Anura indet. Fischer von Waldheim 1813 frog
Reptilia
 Testudines - Emydidae
"? Clemmys owyheensis" = Emys marmorata
"? Clemmys owyheensis" = Emys marmorata Baird and Girard 1852 western pond turtle
Mammalia
 Rodentia - Castoridae
Dipoides wilsoni
Dipoides wilsoni Hibbard 1949 beaver
 Rodentia - Geomyidae
Pliosaccomys sp.
Pliosaccomys sp. Wilson 1936 pocket gopher
 Rodentia - Heteromyidae
Heteromyidae indet., cf. Heteromyidae indet.
Heteromyidae indet. Gray 1868 rodent
cf. Heteromyidae indet. Gray 1868 rodent
 Rodentia - Cricetidae
"cf. Peromyscus pliocenicus" = Basirepomys pliocenicus
"cf. Peromyscus pliocenicus" = Basirepomys pliocenicus Wilson 1937 mouse
 Rodentia - Sciuridae
cf. Spermophilus sp., Spermophilus cf. matachisensis
cf. Spermophilus sp. Cuvier 1825 ground squirrel
 Lagomorpha - Leporidae
Leporidae indet.
Leporidae indet. Fischer de Waldheim 1817 rabbit
 Theriamorpha - Talpidae
Talpidae indet.
Talpidae indet. Fischer de Waldheim 1817 mole
 Carnivora - Mustelidae
Mustelidae "sp. A", Mustelidae "sp. B"
Mustelidae "sp. A" Fischer 1817 mustelid carnivore
Mustelidae "sp. B" Fischer 1817 mustelid carnivore
 Carnivora - Felidae
Felidae indet., Puma cf. lacustris
Felidae indet. Gray 1821 cat
Puma cf. lacustris Gazin 1933 cougar
 Carnivora - Canidae
Vulpes sp., Borophagus sp.
Vulpes sp. Frisch 1775 fox
Borophagus sp. Cope 1892 bone-crushing dog
cf. B. secundus and B. hilli
 Perissodactyla - Equidae
"Pliohippus spectans" = Dinohippus spectans, Cormohipparion sp.
"Pliohippus spectans" = Dinohippus spectans Cope 1880 horse
Cormohipparion sp. Skinner and MacFadden 1977 hipparionine horse
Named in thesis as n. sp. C. plicoartus
 Perissodactyla - Rhinocerotidae
Aphelops cf. mutilus, Teleoceras cf. fossiger
Aphelops cf. mutilus Matthew 1924 rhinoceros
Teleoceras cf. fossiger Cope 1878 rhinoceros
 Artiodactyla - Antilocapridae
Antilocapridae indet.
Antilocapridae indet. Gray 1866 pronghorn
 Artiodactyla - Camelidae
Megatylopus cf. gigas, Hemiauchenia sp., ? Procamelus sp., ? Alforjas sp.
Megatylopus cf. gigas Matthew and Cook 1909 camel
Hemiauchenia sp. Gervais and Ameghino 1880 camel
? Procamelus sp. Leidy 1858 camel
? Alforjas sp. Harrison 1979 camel
 Artiodactyla - Tayassuidae
Tayassuidae indet.
Tayassuidae indet. Palmer 1897 peccary