Harris Ranch Unit B (Oligocene of the United States)

Where: Fall River County, South Dakota (43.2° N, 103.2° W: paleocoordinates 44.2° N, 95.7° W)

• coordinate based on political unit

When: Whitney Member (Brule Formation), Whitneyan (33.3 - 30.8 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 17336: authorized by John Alroy, entered by John Alroy on 18.02.1993

Creative Commons license: CC BY (attribution)

Taxonomic list

• not clear if this includes 1940 Thomson specimens of Miniochoerus affinis (Schultz and Falkenbach 1956) and "Paramerycoidodon wanlessi" (Schultz and Falkenbach 1968) from "Little Bad Lands, Oelrichs"
because this is equivalent to Whitney A, I assume it also equals "Brule Zone C" of F:AM collections
 Leptictida - Leptictidae
Leptictis cf. dakotensis Leidy 1868 eutherian
 Rodentia - Cricetidae
Scottimus sp. Wood 1937 mouse
Scottimus exiguus Wood 1937 mouse
? Wilsoneumys planidens Wilson 1949 mouse
Eumys sp. Leidy 1856 mouse
Eumys elegans Leidy 1856 mouse
Eumys brachyodus Wood 1937 mouse
 Rodentia - Aplodontidae
? Prosciurinae indet. Wilson 1949 mountain beaver
 Rodentia - Sciuridae
Sciuridae indet. Gray 1821 squirrel
 Rodentia - Eomyidae
Paradjidaumo trilophus Cope 1873 rodent
 Rodentia - Florentiamyidae
"Proheteromys nebraskensis" = Kirkomys nebraskensis
"Proheteromys nebraskensis" = Kirkomys nebraskensis Wood 1937 rodent
 Rodentia - Castoridae
Castoridae indet. Gray 1821 beaver
 Rodentia - Ischyromyidae
Ischyromys ? typus1 Leidy 1856 rodent
 Lagomorpha - Leporidae
? Palaeolagus intermedius Matthew 1899 rabbit
Palaeolagus haydeni Leidy 1856 rabbit
Palaeolagus burkei Wood 1940 rabbit
Megalagus turgidus Cope 1873 rabbit
 Lipotyphla - Erinaceidae
Proterix sp. Matthew 1903 hedgehog
 Lipotyphla - Geolabididae
Centetodon cf. magnus Clark 1936 placental
 Perissodactyla - Hyracodontidae
Hyracodon leidyanus2 Troxell 1921 odd-toed ungulate
 Perissodactyla - Rhinocerotidae
Rhinocerotidae indet. Gray 1821 rhinoceros
 Perissodactyla - Equidae
? Miohippus sp. Marsh 1874 anchitheriine horse
 Tribosphenida - Heterosoricidae
Domnina gradata Cope 1873 placental
 Tribosphenida - Proscalopidae
Proscalops tertius Reed 1961 placental
 Carnivora - Amphicyonidae
? Daphoenus sp. Leidy 1853 bear-dog
 Carnivora - Canidae
Hesperocyon sp. Scott 1890 canid
 Carnivora - Nimravidae
Dinictis sp. Leidy 1854 false sabre-tooth
 Ungulata - Merycoidodontidae
Leptauchenia decora Leidy 1856 oreodont
includes "L. cf. harveyi"; presumably includes "L. harveyi" of Schultz and Falkenbach 1968 from "5 miles northwest of Slim Butte" in Brule Zone C
Miniochoerus starkensis3 Schultz and Falkenbach 1956 oreodont
? Merycoidodon sp. Leidy 1848 oreodont
"? Merycoidodon cf. bullatus" = Merycoidodon (Otarohyus) bullatus Leidy 1869 oreodont
probably includes "Otionohyus bullatus" of Schultz and Falkenbach 1968 from "5 mi. NW. of Slim Butte" in Shannon Co. Brule Zone C; and "Genetochoerus geygani" from same locality
 Ungulata -
Leptochoerinae indet. even-toed ungulate
 Ungulata - Hypertragulidae
Hypertragulus cf. calcaratus Cope 1873 ruminant
 Ungulata - Leptomerycidae
Leptomeryx cf. evansi1 Leidy 1853 ruminant
 Hyaenodonta - Hyaenodontidae
Hyaenodon sp. Laizer and Parieu 1838 eutherian
 Theriiformes - Herpetotheriidae
"Herpetotherium cf. fugax" = Peratherium fugax
"Herpetotherium cf. fugax" = Peratherium fugax Cope 1873 marsupial