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

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

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.
Polychaeta
 Sabellida - Serpulidae
Bivalvia
 Ostreida - Malleidae
"Nayadina (Exputens) llajasensis" = Exputens llajasensis
"Nayadina (Exputens) llajasensis" = Exputens llajasensis Clark 1934 oyster
 Carditida - Crassatellidae
Crassatella uvasana Conrad 1855 clam
 Carditida - Carditidae
Venericardia (Pacificor) hornii Gabb 1864 clam
as Venericardia (Pacificor) hornii calafia
 Cardiida - Cardiidae
"Nemocardium linteum" = Nemocardium (Nemocardium) linteum
"Nemocardium linteum" = Nemocardium (Nemocardium) linteum Conrad 1855 cockle
 Solenida - Solenidae
"Solena (Eosolen) navacularis" = Solena (Eosolen) novacularis
"Solena (Eosolen) navacularis" = Solena (Eosolen) novacularis Anderson and Hanna 1925 clam
 Lucinida - Lucinidae
"Claibornites diegoensis" = Claibornites (Claibornites) diegoensis
"Claibornites diegoensis" = Claibornites (Claibornites) diegoensis Dickerson 1916 clam
Gastropoda
 Architaenioglossa - Ampullinidae
Eocernina hannibali Dickerson 1914 snail
 Neogastropoda - Fasciolariidae
Clavilithes sp. n. sp. Swainson 1840 snail
 Neogastropoda - Turridae
"Fusiturricula (Crenaturricula) crenatospira" = Crenaturricula crenatospira, Surculites mathewsonii
"Fusiturricula (Crenaturricula) crenatospira" = Crenaturricula crenatospira Cooper 1894 turrid
as Fusiturricula (Crenaturricula) crenatospira domenginica
Surculites mathewsonii Gabb 1864 turrid
 Stromboidea - Strombidae
"Ectinochilus (Macilentos) macilentus" = Ectinochilus (Macilentos) macilenta
"Ectinochilus (Macilentos) macilentus" = Ectinochilus (Macilentos) macilenta White 1889 true conch
 Tonnoidea - Ranellidae
Cymatium janetae n. sp. Squires 1983 triton shell
Cymatium (Septa) janetae Squires 1983 triton shell
paratype
"Olequahia domenginica" = Ranella domenginica Vokes 1939 triton shell
 Tonnoidea - Cassidae
"Galeodea (Caliagaleodea) californica" = Galeodea californica, "Phalium (Semicassis) tuberculiformis" = Morio (Sconsia) tuberculatus
"Galeodea (Caliagaleodea) californica" = Galeodea californica Clark 1942 snail
"Phalium (Semicassis) tuberculiformis" = Morio (Sconsia) tuberculatus Squires 1984 snail
 Sorbeoconcha - Turritellidae
Turritella andersoni Dickerson 1916 turret shell
as Turritella andersoni lawsoni
Scaphopoda
 Dentaliida - Dentaliidae
Dentalium stentor Anderson and Hanna 1925 tusk shell
Anthozoa
 Scleractinia - Montlivaltiidae
"? Trochocyathus striatus" = Trochosmilia striata
"? Trochocyathus striatus" = Trochosmilia striata Gabb 1864 stony coral
Lyrischapa lajollaensis
  -
"Lyrischapa lajollaensis" = Pejona lajollaensis
"Lyrischapa lajollaensis" = Pejona lajollaensis Hanna 1927