Chadron in Place (Eocene of the United States)

Where: Sioux County, Nebraska (42.4° N, 103.8° W: paleocoordinates 43.8° N, 95.1° W)

• coordinate based on political unit

When: Chadronian (37.2 - 33.9 Ma)

Environment/lithology: terrestrial

Primary reference: J. R. Hough and R. Alf. 1956. A Chadron mammalian fauna from Nebraska. Journal of Paleontology 30(1):132-140 [J. Alroy/J. Alroy/M. Carrano]more details

PaleoDB collection 16929: authorized by John Alroy, entered by John Alroy on 18.02.1993

Creative Commons license: CC BY (attribution)

Taxonomic list

• below the lower purple-white layer
Mammalia
 Perissodactyla - Hyracodontidae
Hyracodon sp.1 Leidy 1856 odd-toed ungulate
 Perissodactyla - Brontotheriidae
Brontops brachycephalus Osborn 1902 brontothere
 Perissodactyla - Equidae
Mesohippus cf. bairdi1 Leidy 1850 anchitheriine horse
 Artiodactyla - Anthracotheriidae
Anthracotheriidae indet.1 Leidy 1869 anthracothere
 Artiodactyla - Leptomerycidae
Leptomeryx esulcatus Cope 1889 ruminant
Leptomeryx evansi Leidy 1853 ruminant
 Artiodactyla - Dichobunidae
Dichobunidae indet.1 Gill 1872 even-toed ungulate
 Artiodactyla - Tayassuidae
Perchoerus ? probus Leidy 1856 peccary
 Artiodactyla - Merycoidodontidae
"Merycoidodon culbertsoni" = Merycoidodon culbertsonii
"Merycoidodon culbertsoni" = Merycoidodon culbertsonii Leidy 1848 oreodont
 Artiodactyla - Camelidae
Poebrotherium sp. Leidy 1847 camel
 Placentalia -
Carnivora indet.1 Bowdich 1821 carnivoran
 Carnivora - Nimravidae
Dinictis sp., "Hoplophoneus mentalis" = Hoplophoneus primaevus
Dinictis sp. Leidy 1854 false sabre-tooth
"Hoplophoneus mentalis" = Hoplophoneus primaevus Leidy and Owen 1851 false sabre-tooth
 Carnivora - Canidae
Hesperocyon gregarius1 Cope 1873 canid
 Rodentia - Cylindrodontidae
Cylindrodon sp.2 Douglass 1902 rodent
 Rodentia - Ischyromyidae
Ischyromys cf. veterior1 Matthew 1903 rodent
Ischyromys typus1 Leidy 1856 rodent