Pearson Ranch (Bed SS21) (Eocene of the United States)

Also known as CIT 147

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 (39.7 - 37.0 Ma)

• bed-level stratigraphic resolution

Environment/lithology: terrestrial; lithology not reported

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 16811: authorized by John Alroy, entered by John Alroy on 18.02.1993

Creative Commons license: CC BY (attribution)

Taxonomic list

• initially reported by Stock 1932b
records of Golz and Lillegraven 1977 omitted by Kelly: Insectivora indet. Rodentia indet. Brontotheriidae indet. ? Triplopus sp.
Mammalia
 Artiodactyla - Oromerycidae
Protylopus pearsonensis Golz 1976 even-toed ungulate
 Artiodactyla - Praetragulidae
Simimeryx hudsoni Stock 1934 ruminant
 Artiodactyla - Agriochoeridae
Protoreodon pacificus Golz 1976 agriochoerid
 Perissodactyla - Amynodontidae
Amynodontopsis bodei Stock 1933 odd-toed ungulate
described by Stock 1936c