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

Also known as CAS loc. 61644; Bell Canyon, Simi Hills

Where: Ventura County, California (34.2° N, 118.7° W: paleocoordinates 40.0° N, 88.8° W)

• coordinate estimated from map

When: Chatsworth Formation, Middle Campanian (83.5 - 70.6 Ma)

• Originally described as "Chico"; Chatsworth Formation. Late medial Campanian (Colburn et al., 1981; Saul and Anderson 1981).

Environment/lithology: marine; gray mudstone

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
 Nuculanida - Sareptidae
"Acila truncata" = Portlandia arctica
"Acila truncata" = Portlandia arctica Gray 1824 clam
 Pectinida - Propeamussiidae
"Pecten (Propeamusium) cowperi n. sp." = Propeamussium (Parvamussium) cowperi
"Pecten (Propeamusium) cowperi n. sp." = Propeamussium (Parvamussium) cowperi Waring 1917 mud scallop
 Arcida - Glycymerididae
"Glycimeris veatchii" = Glycymerita veatchii
"Glycimeris veatchii" = Glycymerita veatchii Gabb 1864 clam
 Arcida - Parallelodontidae
"Nemodon (Arca) breweriana" = Parallelodon (Nanonavis) brewerianus
"Nemodon (Arca) breweriana" = Parallelodon (Nanonavis) brewerianus Gabb 1864 clam
 Arcida - Cucullaeidae
"Cucullaea youngi n. sp." = Cucullaea (Idonearca) youngi
"Cucullaea youngi n. sp." = Cucullaea (Idonearca) youngi Waring 1917 clam
 Carditida - Astartidae
"Crassatellites tuscanus" = Astarte tuscana
"Crassatellites tuscanus" = Astarte tuscana Gabb 1864 clam
 Cardiida - Arcticidae
"Dosinia milthoidea n. sp." = Tenea inflata
"Dosinia milthoidea n. sp." = Tenea inflata Gabb 1864 clam
 Cardiida - Veneridae
"Macrocallista cordata n. sp." = Paraesa lens
"Macrocallista cordata n. sp." = Paraesa lens Gabb 1864 venus clam
 Cardiida - Glossidae
Isocardia chicoensis n. sp. Waring 1917 clam
 Trigoniida - Megatrigonioidae
"Trigonia evansana" = Pterotrigonia evansana
"Trigonia evansana" = Pterotrigonia evansana Meek 1864 clam
Gastropoda
 Heterostropha - Ringiculidae
"Cinulia obliqua" = Biplica obliqua
"Cinulia obliqua" = Biplica obliqua Gabb 1864 snail
 Heterostropha - Architectonicidae
Solariaxis templetoni n. sp. Waring 1917 sundial
 Architaenioglossa - Ampullinidae
"Amauropsis oviformis" = Ampullina oviformis
"Amauropsis oviformis" = Ampullina oviformis Gabb 1864 snail
 Neogastropoda - Cancellariidae
"Cancellaria crassa n. sp." = Cancellaria simiana
"Cancellaria crassa n. sp." = Cancellaria simiana Hanna 1924 snail
 Neogastropoda - Turridae
Turris plicata n. sp. Waring 1917 turrid
 Sorbeoconcha - Capulidae
Lysis suciensis Whiteaves 1879 snail
 Cerithioidea - Turritellidae
Turritella chicoensis Gabb 1864 turret shell
Cephalopoda
 Ammonitida - Desmoceratidae
Hauericeras transitionale n. sp. Waring 1917 ammonite
Echinoidea
 Clypeasteroida - Scutellidae
? Scutella sp. Lamarck 1816 sand dollar
Ophiuroidea
 Amphilepidida - Amphiuridae
Amphiura lymani n. sp. Waring 1917 brittle star