CSUN Loc. 373 - Santa Susana Mountains [Llajas Fm] (Eocene to of the United States)

Where: Los Angeles County, California (34.3° N, 118.6° W: paleocoordinates 36.2° N, 102.9° W)

• coordinate estimated from map

• small collection-level geographic resolution

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

• bed-level stratigraphic resolution

Environment/lithology: offshore; bioturbated sandstone

• sandstone.

Size class: macrofossils

Reposited in the LACM

Collection methods: bulk,

Primary reference: R. L. Squires. 1984. Megapaleontology of the Eocene Llajas Formation, Simi Valley, California. Contributions in Science, Natural History Museum of Los Angeles County 350:1-76 [M. Clapham/M. Clapham]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 200144: authorized by Jonathan Marcot, entered by Jonathan Marcot on 22.03.2019

Creative Commons license: CC BY (attribution)

Taxonomic list

• New species only.
Bivalvia
 Arcida - Glycymerididae
"Glycymeris (Glycymerita) sagittata" = Glycymeris sagittata, "Glycymeris (Glycymeris) rosecanyonensis" = Glycymeris rosecanyonensis
"Glycymeris (Glycymerita) sagittata" = Glycymeris sagittata Gabb 1864 clam
"Glycymeris (Glycymeris) rosecanyonensis" = Glycymeris rosecanyonensis Hanna 1927 clam
 Pholadida - Corbulidae
"Corbula (Caryocorbula) dickersoni" = Corbula dickersoni
"Corbula (Caryocorbula) dickersoni" = Corbula dickersoni Weaver and Palmer 1922 clam
 Cardiida - Veneridae
"Callista (Costacallista) cf. hornii" = Meretrix hornii
"Callista (Costacallista) cf. hornii" = Meretrix hornii Gabbb 1864 venus clam
 Cardiida - Cardiidae
"Nemocardium linteum" = Nemocardium (Nemocardium) linteum
"Nemocardium linteum" = Nemocardium (Nemocardium) linteum Conrad 1855 cockle
Gastropoda
 Cephalaspidea - Cylichnidae
"Cylichnina tantilla" = Cylichnella tantilla
"Cylichnina tantilla" = Cylichnella tantilla Anderson and Hanna 1925 snail
 Triphoroidea - Cerithiopsidae
Cerithiopsis llajasensis Squires 1984 snail
 Architaenioglossa - Ampullinidae
Eocernina hannibali Dickerson 1914 snail
Pachycrommium clarki Stewart 1927 snail
 Neogastropoda - Buccinidae
Pseudoliva lineata Gabb 1864 true whelk
 Neogastropoda - Harpidae
"Eocithara mutica" = Harpa mutica
"Eocithara mutica" = Harpa mutica Lamarck 1803 snail
as Eocithara mutica californiensis
 Neogastropoda - Conidae
Conus hornii Gabb 1864 cone shell
as Conus hornii umpquaensis
 Stromboidea - Strombidae
"Ectinochilus (Macilentos) macilentus" = Ectinochilus (Macilentos) macilenta
"Ectinochilus (Macilentos) macilentus" = Ectinochilus (Macilentos) macilenta White 1889 true conch
 Ficoidea - Ficidae
Ficopsis remondii Gabb 1864 fig shell
as Ficopsis remondii crescentensis
 Naticoidea - Naticidae
Tejonia moragai Stewart 1927 moon snail
 Tonnoidea - Bursidae
Ranellina pilsbryi Stewart 1927 frog shell
 Tonnoidea - Cassidae
"Phalium (Semicassis) tuberculiformis" = Morio (Sconsia) tuberculatus
"Phalium (Semicassis) tuberculiformis" = Morio (Sconsia) tuberculatus Squires 1984 snail
 Sorbeoconcha - Turritellidae
Turritella buwaldana Dickerson 1916 turret shell
 Architectonicoidea - Architectonicidae
"Architectonica (Stellaxis) cognata" = Stellaxis cognata
"Architectonica (Stellaxis) cognata" = Stellaxis cognata Gabb 1864 sundial
Scaphopoda
 Dentaliida - Dentaliidae
Dentalium stentor Anderson and Hanna 1925 tusk shell
Lyrischapa lajollaensis
  -
"Lyrischapa lajollaensis" = Pejona lajollaensis
"Lyrischapa lajollaensis" = Pejona lajollaensis Hanna 1927