Hartman Ranch (UCMP V-5814) (Eocene of the United States)

Where: Ventura County, California (34.6° N, 119.3° W: paleocoordinates 34.8° N, 106.0° W)

• coordinate based on nearby landmark

• small collection-level geographic resolution

When: Sespe Formation, Late/Upper Uintan (46.2 - 39.7 Ma)

Environment/lithology: fluvial-lacustrine; coarse-grained, green, calcareous sandstone and red shale

• Fossils were collected from calcareous, green, thin lenses of coarse-grained sandstone within the red shales near the base of the Sespe Formation. The sandstone lenses are lithologically similar to the Coldwater Sandstone that underlies the Sespe Formation and suggest local intertonguing of the Lower Sespe Formation with characteristic Coldwater Sandstone.

Size class: macrofossils

Reposited in the UCMP

Primary reference: E. H. Lindsay. 1968. Rodents from the Hartman Ranch Local Fauna, California. PaleoBios 6:1-22 [J. Alroy/J. Alroy/J. Ju]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 16817: authorized by John Alroy, entered by John Alroy on 18.02.1993, edited by Patricia Holroyd

Creative Commons license: CC BY (attribution)

Taxonomic list

• NOT in the Simi Valley
"approximately 140 isolated teeth"; this appears to include @101 unidentifiable specimens
presumably there are other mammals, but they are not even hinted at
"near the top of Chron C19n (about 41.2 Ma)": Prothero and Vance 1995
Show authors, comments, and common names
Reptilia
 Testudines -
"Chelonia indet." = Testudines2
"Chelonia indet." = Testudines2 Batsch 1788 turtle
Mammalia
 Rodentia - Cylindrodontidae
Pareumys sp.
Pareumys sp. Peterson 1919 rodent
 Rodentia - Simimyidae
Simimys sp.
Simimys sp. Wilson 1935 rodent
 Rodentia -
Griphomys alecer3
Griphomys alecer3 Wilson 1940 rodent
 Rodentia - Eomyidae
Metanoiamys fantasma1
Metanoiamys fantasma1 Lindsay 1968 rodent
1Alroy 2002; 2Golz and Lillegraven 1977; 3Kelly and Whistler 1994