CSUN Loc. 445 - Santa Susana Mountains [Llajas Fm] (Eocene to of the United States)

Also known as LACMIP Loc. 40455; CIT Loc. 215; LACMIP loc. 11809

Where: Ventura County, California (34.0° N, 118.0° W: paleocoordinates 35.8° N, 102.2° W)

• small collection-level geographic resolution

When: Llajas Formation, Ypresian to Ypresian (56.0 - 41.3 Ma)

• The stewart bed is a 1 m thick sandstone unit in the middle of the LLajas formation.

• bed-level stratigraphic resolution

Environment/lithology: offshore; bioturbated sandstone

• The stewart bed is located in a section of transition from shallow-marine to outer slope and shelf facies.
• sandstone.

Size class: macrofossils

Reposited in the LACM

Collection methods: bulk,

Primary reference: R. L. Squires. 1983. New Mollusks from the Lower Middle Eocene Llajas Formation, Southern California. Journal of Paleontology 57(2):354-362 [L. Ivany/E. Kowalski/J. Marcot]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 8014: authorized by Linda Ivany, entered by Elizabeth Kowalski on 12.06.2000, edited by Jonathan Marcot

Creative Commons license: CC BY (attribution)

Taxonomic list

• New species only.
Show authors, comments, and common names
Polychaeta
 Sabellida - Serpulidae
"Rotularia tejonense" = Rotularia (Rotularia) tejonense2
"Rotularia tejonense" = Rotularia (Rotularia) tejonense2 Arnold 1909
Scaphopoda
 Dentaliida - Dentaliidae
Dentalium stentor2
Dentalium stentor2 Anderson and Hanna 1925 tusk shell
Gastropoda
 Cerithioidea - Turritellidae
Turritella andersoni2
Turritella andersoni2 Dickerson 1916 turret shell
as Turritella andersoni lawsoni
 Architaenioglossa - Ampullinidae
Eocernina hannibali2
Eocernina hannibali2 Dickerson 1914 snail
 Neogastropoda - Fasciolariidae
Clavilithes sp. n. sp.
Clavilithes sp. n. sp. Swainson 1840 snail
 Neogastropoda - Clavatulidae
"Fusiturricula (Crenaturricula) crenatospira" = Crenaturricula crenatospira2
"Fusiturricula (Crenaturricula) crenatospira" = Crenaturricula crenatospira2 Cooper 1894 snail
as Fusiturricula (Crenaturricula) crenatospira domenginica
 Neogastropoda - Turridae
Surculites mathewsonii2
Surculites mathewsonii2 Gabb 1864 turrid
 Neogastropoda - Volutidae
Lyrischapa lajollaensis2
Lyrischapa lajollaensis2 Hanna 1927 volute
 Sorbeoconcha - Strombidae
Ectinochilus (Macilentos) macilentus2
 Sorbeoconcha - Cypraeidae
Bernaya kaylinae1
Bernaya kaylinae1 Groves and Squires 2023 cowry
 Sorbeoconcha - Cymatiidae
"Olequahia domenginica" = Ranella domenginica2
"Olequahia domenginica" = Ranella domenginica2 Vokes 1939 snail
 Sorbeoconcha - Cassidae
Phalium (Semicassis) tuberculiformis2, "Galeodea (Caliagaleodea) californica" = Galeodea californica2
"Galeodea (Caliagaleodea) californica" = Galeodea californica2 Clark 1942 snail
 Sorbeoconcha - Ranellidae
Cymatium janetae n. sp., Cymatium (Septa) janetae2
Cymatium janetae n. sp. Squires 1983 triton shell
Cymatium (Septa) janetae2 Squires 1983 triton shell
paratype
Bivalvia
 Ostreida - Malleidae
Nayadina (Exputens) llajasensis2
 Cardiida - Cardiidae
"Nemocardium linteum" = Nemocardium (Nemocardium) linteum2
"Nemocardium linteum" = Nemocardium (Nemocardium) linteum2 Conrad 1855 cockle
 Solenida - Solenidae
"Solena (Eosolen) navacularis" = Solena (Eosolen) novacularis2
"Solena (Eosolen) navacularis" = Solena (Eosolen) novacularis2 Anderson and Hanna 1925 clam
 Lucinida - Lucinidae
"Claibornites diegoensis" = Claibornites (Claibornites) diegoensis2
"Claibornites diegoensis" = Claibornites (Claibornites) diegoensis2 Dickerson 1916 clam
 Carditida - Crassatellidae
Crassatella uvasana2
Crassatella uvasana2 Conrad 1855 clam
 Carditida - Carditidae
Venericardia (Pacificor) hornii2
Venericardia (Pacificor) hornii2 Gabb 1864 clam
as Venericardia (Pacificor) hornii calafia
Anthozoa
 Scleractinia - Caryophylliidae
? Trochocyathus striatus2
? Trochocyathus striatus2 Gabb 1864 stony coral
1Groves and Squires 2023; 2Squires 1984