Pearson Ranch (Bed CS18) (Eocene of the United States)

Also known as LACM 3376, 5611, 5612, 5613, 5643, 5647, 5874

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 16809: authorized by John Alroy, entered by John Alroy on 27.09.1993

Creative Commons license: CC BY (attribution)

Taxonomic list

Mammalia
 Rodentia -
Griphomys alecer2 Wilson 1940 rodent
LACM 5612
 Rodentia - Ischyromyidae
Microparamys tricus1 Wilson 1940 rodent
LACM 5611
 Ungulata - Praetragulidae
Simimeryx hudsoni Stock 1934 ruminant