Thistle Quarry (Miocene of the United States)

Where: Sioux County, Nebraska (42.4° N, 103.8° W: paleocoordinates 43.1° N, 99.9° W)

• coordinate based on political unit

• small collection-level geographic resolution

When: middle Member (Sheep Creek Formation), Hemingfordian (20.4 - 16.0 Ma)

Environment/lithology: terrestrial

Primary reference: M. F. Skinner, S. M. Skinner, and R. J. Gooris. 1977. Stratigraphy and biostratigraphy of late Cenozoic deposits in central Sioux County, western Nebraska. Bulletin of the American Museum of Natural History 158(5):263-370 [J. Alroy/J. Alroy/J. Alroy]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 18000: authorized by John Alroy, entered by John Alroy on 30.04.1994, edited by Jonathan Marcot

Creative Commons license: CC BY (attribution)

Taxonomic list

Mammalia
 Perissodactyla - Rhinocerotidae
Aphelops megalodus4 Cope 1873 rhinoceros
Teleoceras americanum4 Yatkola and Tanner 1979 rhinoceros
 Perissodactyla - Equidae
Archaeohippus penultimus Matthew 1924 anchitheriine horse
Merychippus primus Osborn 1918 horse
Acritohippus tertius3 Osborn 1918 horse
Supplemental Table S1
 Artiodactyla - Palaeomerycidae
Sinclairomeryx riparius1 Matthew 1924 ruminant
see also Stirton 1944
 Artiodactyla - Antilocapridae
"Submeryceros minor" = Merycodus minor1
"Submeryceros minor" = Merycodus minor1 Frick 1937 pronghorn
 Artiodactyla - Merycoidodontidae
Merychyus relictus5 Matthew and Cook 1909 oreodont
 Carnivora - Amphicyonidae
Amphicyon sp.2 Lartet 1836 bear-dog
 Carnivora - Canidae
Leptocyon leidyi6 Tedford et al. 2009 canine
Protomarctus optatus7 Matthew 1924 bone-crushing dog