Pearson Ranch (Bed SS18) (Eocene of the United States)

Also known as CIT 145 (includes LACM 3373 - 3380, 3390, 3548, 3549), LACM 5638

Where: Ventura County, California (34.3° N, 119.0° W: paleocoordinates 33.7° N, 107.3° W)

• coordinate based on political unit

• small collection-level geographic resolution

When: Sespe Formation, Duchesnean (40.4 - 37.2 Ma)

• bed-level stratigraphic resolution

Environment/lithology: terrestrial; lithology not reported

Reposited in the LACM

Primary reference: T. S. Kelly. 1990. Biostratigraphy of Uintan and Duchesnean land mammal assemblages from the Middle Member of the Sespe Formation, Simi Valley, California. Contributions in Science, Natural History Museum of Los Angeles County 419:1-42 [J. Alroy/J. Alroy/J. Marcot]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 16808: authorized by John Alroy, entered by John Alroy on 18.02.1993, edited by Patricia Holroyd

Creative Commons license: CC BY (attribution)

Taxonomic list

Mammalia
 Rodentia -
Griphomys alecer Wilson 1940 rodent
 Perissodactyla - Brontotheriidae
Duchesneodus uintensis1 Peterson 1931 brontothere
 Perissodactyla - Amynodontidae
Amynodontopsis bodei Stock 1933 odd-toed ungulate
 Artiodactyla - Oromerycidae
Protylopus pearsonensis Golz 1976 even-toed ungulate
 Artiodactyla - Agriochoeridae
Protoreodon pacificus Golz 1976 agriochoerid
 Artiodactyla - Praetragulidae
Simimeryx hudsoni Stock 1934 ruminant
Reptilia
 Testudines - Trionychidae
Trionychidae indet.2 Gray 1825 softshell turtle
 Testudines -
"Chelonia indet." = Testudines2
"Chelonia indet." = Testudines2 Batsch 1788 turtle