PBDB Collection

Chico area south of the Santa Monica Mountains (Locality 3 of Waring 1917) (Cretaceous of the United States)

Where: Los Angeles County, California (34.1° N, 118.5° W: paleocoordinates 38.6° N, 85.4° W)

• coordinate estimated from map

When: Tuna Canyon Formation, Late/Upper Cretaceous (100.5 - 66.0 Ma)

• Originally described as "Chico," but now mapped as Tuna Canyon (Yerkes and Showalter 1993)

Environment/lithology: marine; sandstone and shale

• "The Chico strata of the Calabasas sheet are lithologically like those of the northern Coast Ranges, and contain a similar fauna. They consist of a lower sandstone and an upper shale member, both of upper Chico age."

Size classes: macrofossils, mesofossils

Reposited in the CAS

• Leland Stanford Junior University Paleontology Collections, eventually transferred to the California Academy of Sciences

Primary reference: C. A. Waring. 1917. Stratigraphic and faunal relations of the Martinez to the Chico and Tejon of Southern California. Proceedings of the California Academy of Sciences 7(4):41-124 [L. Villier/L. Villier]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 193034: authorized by Jonathan Marcot, entered by Jonathan Marcot on 04.05.2018

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names

Cephalopoda
Ammonitida - Placenticeratidae	"Placenticeras pacificum" = Metaplacenticeras pacificum, "Placenticeras californicum" = Metaplacenticeras californicum, "Placenticeras sanctaemonicae n. sp." = Metaplacenticeras sanctaemonicae "Placenticeras pacificum" = Metaplacenticeras pacificum Smith 1900 ammonite "Placenticeras californicum" = Metaplacenticeras californicum Anderson 1902 ammonite "Placenticeras sanctaemonicae n. sp." = Metaplacenticeras sanctaemonicae Waring 1917 ammonite
Gastropoda
Sorbeoconcha - Aporrhaidae	"Pugnellus rotundus n. sp." = Lispodesthes rotundatus "Pugnellus rotundus n. sp." = Lispodesthes rotundatus Waring 1917 snail
Bivalvia
Carditida - Crassatellidae	"Crassatellites conradianus" = Crassatella conradiana "Crassatellites conradianus" = Crassatella conradiana Gabb 1864 clam
Pholadomyida - Pholadomyidae	Pholadomya subelongata Pholadomya subelongata Meek 1857 clam
Cardiida - Mactridae	Cymbophora popenoei¹, "Crassatellites triangulatus n. sp." = Cymbophora triangulata Cymbophora popenoei¹ Saul 1974 clam "Crassatellites triangulatus n. sp." = Cymbophora triangulata Waring 1917 clam
Cardiida - Veneridae	"Venus pertenuis" = Clementia (Egesta) pertenuis, Calva (Egelicalva) bowersiana² "Venus pertenuis" = Clementia (Egesta) pertenuis Gabb 1864 venus clam Calva (Egelicalva) bowersiana² Cooper 1894 venus clam
Ostreida - Pinnidae	Pinna calamitoides Pinna calamitoides Shumard 1858 oyster
Myalinida - Inoceramidae	Inoceramus pembertoni n. sp., Inoceramus whitneyi Inoceramus pembertoni n. sp. Waring 1917 clam Inoceramus whitneyi Gabb 1869 clam
Arcida - Glycymerididae	"Glycimeris veatchii" = Glycymerita veatchii "Glycimeris veatchii" = Glycymerita veatchii Gabb 1864 clam

¹Saul 1974; ²Saul and Popenoe 1992