Blacktail Deer Creek ( of the United States)

Where: Beaverhead County, Montana (45.0° N, 112.8° W: paleocoordinates 46.1° N, 107.8° W)

• coordinate based on political unit

When: Blacktail Deer Creek Formation, Harrisonian (24.8 - 20.4 Ma)

Environment/lithology: terrestrial; sandy claystone and sandstone

• Fine sandy clay with thin strata of sandstone

Size class: macrofossils

Collection methods: quarrying,

Primary reference: C. W. Hibbard and K. A. Keenmon. 1950. Contr MPUM 8(7) [J. Alroy/J. Alroy]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 17761: authorized by John Alroy, entered by John Alroy on 18.02.1993, edited by Jill Wertheim

Creative Commons license: CC BY (attribution)

Taxonomic list

• Turtle remains also mentioned
Reptilia
 Testudines -
"Chelonia indet." = Testudines2
"Chelonia indet." = Testudines2 Batsch 1788 turtle
Turtle remains not studied
Mammalia
 Rodentia - Geomyidae
Entoptychus montanensis1 Hibbard and Keenmon 1951 pocket gopher
 Rodentia - Castoridae
Neatocastor hesperus1 Douglass 1902 beaver
 Perissodactyla - Rhinocerotidae
Rhinocerotidae indet.1 Gray 1821 rhinoceros
 Ungulata - Merycoidodontidae
"Merycochoerus chelydra" = Promerycochoerus chelydra1
"Merycochoerus chelydra" = Promerycochoerus chelydra1 Cope 1884 oreodont
 Ungulata - Anthracotheriidae
Arretotherium acridens n. sp.2 Douglass 1902 anthracothere