CSUN 704, Simi Hills (Eocene of the United States)

Where: Ventura County, California (34.2° N, 118.8° W: paleocoordinates 35.0° N, 104.7° W)

• coordinate estimated from map

• small collection-level geographic resolution

When: Llajas Formation, Lutetian (47.8 - 41.3 Ma)

• bed-level stratigraphic resolution

Environment/lithology: offshore; sandstone

• Shallow-marine (transgressive) facies.

Size class: macrofossils

Collected by R. L. Squires in 1983; reposited in the LACM

Collection methods: bulk,

• Repository: Formerly California State University Northridge (CSUN)

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 207189: authorized by Jonathan Marcot, entered by Jonathan Marcot on 31.12.2019

Creative Commons license: CC BY (attribution)

Taxonomic list

Gastropoda
 Heterostropha - Architectonicidae
 Architaenioglossa - Ampullinidae
Eocernina hannibali Dickerson 1914 snail
 Cerithioidea - Turritellidae
Turritella andersoni Dickerson 1916 turret shell
as Turritella andersoni lawsoni
Turritella uvasana Conrad 1855 turret shell
as Turritella uvasana applinae
 Sorbeoconcha - Naticidae
Neverita (Neverita) globosa Gabb 1869 moon snail
 Neogastropoda - Fasciolariidae
Clavilithes sp. Swainson 1840 snail
as "Clavilithes n. sp. A"
Clavilithes tabulatus Dickerson 1913 snail
 Neogastropoda - Volutidae
Lyrischapa lajollaensis Hanna 1927 volute
Bivalvia
 Arcida - Glycymerididae
 Carditida - Carditidae
Venericardia (Pacificor) hornii Gabb 1864 clam
as Venericardia (Pacificor) hornii calafia
 Cardiida - Cardiidae
"Acanthocardia (Schedocardia) brewerii" = Schedocardia brewerii
"Acanthocardia (Schedocardia) brewerii" = Schedocardia brewerii Gabb 1864 cockle
 Cardiida - Veneridae