Harris Ranch Unit A (Oligocene of the United States)

Where: Fall River County, South Dakota (43.2° N, 103.2° W: paleocoordinates 44.4° N, 95.0° W)

• coordinate based on political unit

When: lower Member (Brule Formation), Orellan (33.9 - 33.3 Ma)

• member-level stratigraphic resolution

Environment/lithology: terrestrial

Primary reference: W. F. Simpson. 1985. Geology and paleontology of the Oligocene Harris Ranch Badlands, southwestern South Dakota. Dakoterra 2(2):303-333 [J. Alroy/J. Alroy/J. Marcot]more details

PaleoDB collection 17115: authorized by John Alroy, entered by John Alroy on 18.02.1993

Creative Commons license: CC BY (attribution)

Taxonomic list

• not clear what "? Miohippus sp." is
Mammalia
 Rodentia - Ischyromyidae
"Ischyromys pliacus" = Ischyromys typus
"Ischyromys pliacus" = Ischyromys typus Leidy 1856 rodent
 Rodentia - Castoridae
"Eutypomys magnus" = Oligotheriomys magnus
"Eutypomys magnus" = Oligotheriomys magnus Wood 1937 beaver
 Rodentia - Cricetidae
Eumys sp. Leidy 1856 mouse
Eumys elegans Leidy 1856 mouse
 Lagomorpha - Leporidae
Palaeolagus burkei Schlaikjer 1935 rabbit
Palaeolagus haydeni Leidy 1856 rabbit
Megalagus turgidus Cope 1873 rabbit
 Theriamorpha - Geolabididae
Centetodon wolffi Macdonald 1965 placental
 Perissodactyla - Rhinocerotidae
Rhinocerotidae indet. Gray 1821 rhinoceros
 Perissodactyla - Hyracodontidae
Hyracodon nebraskensis Leidy 1850 odd-toed ungulate
probably OK because Harris Ranch H. leidyanus material of Prothero 1996e is implicitly only from the Whitney
 Perissodactyla - Equidae
"Miohippus bairdii" = Mesohippus bairdi
"Miohippus bairdii" = Mesohippus bairdi Leidy 1850 anchitheriine horse
 Artiodactyla - Camelidae
"Poebrotherium cf. labiatum" = Paratylopus labiatus
"Poebrotherium cf. labiatum" = Paratylopus labiatus Cope 1881 camel
 Artiodactyla - Hypertragulidae
Hypertragulus cf. calcaratus Cope 1873 ruminant
 Artiodactyla - Leptomerycidae
Leptomeryx evansi Leidy 1853 ruminant
 Artiodactyla - Merycoidodontidae
? Merycoidodon cf. bullatus Leidy 1869 oreodont
Miniochoerus affinis Leidy 1869 oreodont
 Creodonta - Hyaenodontidae
? Hyaenodontidae indet. Leidy 1869 creodont