Chico area in Bell's Canyon north of Simi fault (Locality 2 of Waring 1917) (Cretaceous of the United States)

Where: Ventura County, California (34.2° N, 118.7° W: paleocoordinates 38.7° N, 85.5° W)

• coordinate estimated from map

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

• Originally described as "Chico," but now mapped as Chatsworth (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 193033: authorized by Jonathan Marcot, entered by Jonathan Marcot on 04.05.2018

Creative Commons license: CC BY (attribution)

Taxonomic list

Bivalvia
 Arcida - Parallelodontidae
 Arcida - Cucullaeidae
Cucullaea youngi n. sp. Waring 1917 clam
 Pectinida - Pectinoidae
Pecten cowperi n. sp. Waring 1917 scallop
 Carditida - Crassatellidae
"Crassatellites tuscanus" = Crassatella
"Crassatellites tuscanus" = Crassatella clam
 Cardiida - Glossidae
Isocardia chicoensis n. sp. Waring 1917 clam
 Cardiida - Veneridae
Dosinia milthoidea n. sp. Waring 1917 venus clam
Macrocallista cordata n. sp. Waring 1917 venus clam
 Hiatellida - Hiatellidae
Glycimeris veatchii Gabb 1864 clam
 Trigoniida - Trigoniidae
Trigonia evansana Meek 1864 clam
 Nuculida - Nuculidae
Acila truncata divaricate nutclam
Gastropoda
 Neogastropoda - Cancellariidae
Cancellaria crassa n. sp. Waring 1917 snail
 Neogastropoda - Turridae
Turris plicata n. sp. Waring 1917 turrid
 Naticoidea - Naticidae
Amauropsis oviformis Gabb 1864 moon snail
 Calyptraeoidea - Trichotropidae
Lysis suciensis Whiteaves 1879 snail
 Sorbeoconcha - Turritellidae
Turritella chicoensis Gabb 1864 turret shell
 Heterostropha - Ringiculidae
"Cinulia obliqua" = Biplica obliqua
"Cinulia obliqua" = Biplica obliqua Gabb 1864 snail
 Architectonicoidea - Architectonicidae
Solariaxis templetoni n. sp. Waring 1917 sundial
Cephalopoda
 Ammonitida - Desmoceratidae
Hauericeras transitionale n. sp. Waring 1917 ammonite
Ophiuroidea
 Ophiurida - Amphiuridae
Amphiura lymani n. sp. Waring 1917 brittle star
Echinoidea
 Clypeasteroida - Scutellidae
? Scutella sp. Lamarck 1816 sand dollar