Pearson Ranch (Bed CS16) (Eocene of the United States)

Also known as CIT 148, LACM 3379, 5641

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 16806: authorized by John Alroy, entered by John Alroy on 18.02.1993, edited by Patricia Holroyd

Creative Commons license: CC BY (attribution)

Taxonomic list

Reptilia
 Testudines -
"Chelonia indet." = Testudines2
"Chelonia indet." = Testudines2 Batsch 1788 turtle
 Squamata - Anguidae
Anguidae indet.2 Gray 1825 squamates
Mammalia
 Placentalia -
? Carnivora indet.2 Bowdich 1821 carnivoran
from CIT 148
 Perissodactyla - Amynodontidae
Amynodontopsis bodei Stock 1933 odd-toed ungulate
 Perissodactyla - Hyracodontidae
? Triplopus woodi3 Stock 1936 odd-toed ungulate
described by Stock 1936c from CIT 148;
 Perissodactyla - Brontotheriidae
Duchesneodus uintensis1 Peterson 1931 brontothere
 Artiodactyla - Protoceratidae
Leptoreodon stocki Kelly 1990 protoceratid
 Artiodactyla - Praetragulidae
Simimeryx hudsoni Stock 1934 ruminant
 Artiodactyla - Agriochoeridae
Protoreodon pacificus Golz 1976 agriochoerid
 Theriamorpha - Sespedectidae
Sespedectes singularis Stock 1935 placental
 Rodentia - Ischyromyidae
Microparamys tricus Wilson 1940 rodent
 Rodentia - Simimyidae
Simimys simplex Wilson 1935 rodent
 Rodentia - Cylindrodontidae
Pareumys milleri Peterson 1919 rodent