La Brea Tar Pits (Pleistocene of the United States)

Where: California (34.5° N, 118.2° W: paleocoordinates 34.5° N, 118.2° W)

When: Middle Pleistocene (0.8 - 0.1 Ma)

• Specimens at La Brea mostly range from 11,500 to 35,000 years old. One of the older pits, pit 77, has a mean calibrated age of 35,370, while a younger pit, pits 61/67, has a mean calibrated age of 11,581 before present. Many other pits fall in between these dates, however, most seem to occur between 20,000–29,000 years ago

Environment/lithology: terrestrial; black tar

Size class: macrofossils

Primary reference: D. B. Jones and L. R. G. Desantis. 2017. Dietary ecology of ungulates from the La Brea tar pits in southern California: A multi-proxy approach. 465(15):110-127 [M. Uhen/J. So]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 190077: authorized by Mark Uhen, entered by Jeankyong So on 27.11.2017

Creative Commons license: CC BY (attribution)

Taxonomic list

Mammalia
 Perissodactyla - Equidae
"Equus occidentalis" = Equus (Dolichohippus) simplicidens
"Equus occidentalis" = Equus (Dolichohippus) simplicidens Cope 1892 horse
 Ungulata - Camelidae
Camelops hesternus Leidy 1873 camel
 Ungulata - Bovidae
Bison antiquus Leidy 1852 bison