PBDB Collection

CSUN Loc. 373, Santa Susana Mountains (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.

Show authors, comments, and common names

Gastropoda
Heterostropha - Architectonicidae	Architectonica (Stellaxis) cognata Architectonica (Stellaxis) cognata Gabb 1864 sundial
Sorbeoconcha - Cerithiopsidae	Cerithiopsis llajasensis Cerithiopsis llajasensis Squires 1984 snail
Sorbeoconcha - Naticidae	Tejonia moragai, Natica (Naticarius) aff. uvasana Tejonia moragai Stewart 1927 moon snail Natica (Naticarius) aff. uvasana Gabb 1864 moon snail
Neogastropoda - Conidae	Conus hornii Conus hornii Gabb 1864 cone shell as Conus hornii umpquaensis
Neogastropoda - Pseudolividae	"Pseudoliva lineata" = Calorebama dilleri lineata "Pseudoliva lineata" = Calorebama dilleri lineata Gabb 1864 snail
Neogastropoda - Harpidae	"Eocithara mutica" = Harpa mutica "Eocithara mutica" = Harpa mutica Lamarck 1803 snail as Eocithara mutica californiensis
Neogastropoda - Volutidae	Lyrischapa lajollaensis Lyrischapa lajollaensis Hanna 1927 volute
Sorbeoconcha - Ficidae	Ficopsis remondii Ficopsis remondii Gabb 1864 fig shell as Ficopsis remondii crescentensis
Sorbeoconcha - Cassidae	Phalium (Semicassis) tuberculiformis Phalium (Semicassis) tuberculiformis Gabb 1864 snail
Sorbeoconcha - Bursidae	Ranellina pilsbryi Ranellina pilsbryi Stewart 1927 frog shell
Sorbeoconcha - Strombidae	Ectinochilus (Macilentos) macilentus Ectinochilus (Macilentos) macilentus White 1889 true conch
Architaenioglossa - Ampullinidae	Eocernina hannibali, Pachycrommium clarki Eocernina hannibali Dickerson 1914 snail Pachycrommium clarki Stewart 1927 snail
Cerithioidea - Turritellidae	Turritella buwaldana Turritella buwaldana Dickerson 1916 turret shell
Opisthobranchia - Retusidae	Cylichnina tantilla Cylichnina tantilla Anderson and Hanna 1925 snail
Scaphopoda
Dentaliida - Dentaliidae	Dentalium (Laevidentalium) calafium, Dentalium stentor Dentalium (Laevidentalium) calafium Vokes 1939 tusk shell Dentalium stentor Anderson and Hanna 1925 tusk shell
Bivalvia
Arcida - Glycymerididae	Glycymeris (Glycymerita) sagittata, Glycymeris (Glycymeris) rosecanyonensis Glycymeris (Glycymerita) sagittata Gabb 1864 clam Glycymeris (Glycymeris) rosecanyonensis Hanna 1927 clam
Cardiida - Cardiidae	"Nemocardium linteum" = Nemocardium (Nemocardium) linteum "Nemocardium linteum" = Nemocardium (Nemocardium) linteum Conrad 1855 cockle
Cardiida - Veneridae	Callista (Costacallista) cf. hornii Callista (Costacallista) cf. hornii Gabb 1864 venus clam
Pholadida - Corbulidae	Corbula (Caryocorbula) dickersoni Corbula (Caryocorbula) dickersoni Weaver and Palmer 1922 clam