CSUN Loc. 475 - Santa Susana Mountains [Llajas Fm] (Eocene to of the United States)

Also known as LACMIP Loc. 16337

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, from which most fossils reported in this reference are drawn, is a 1 m thick sandstone unit in the middle of the LLajas formation. This collection is from 155 m above the Stewart Bed, in the upper Llajas Fm.

• 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 8016: authorized by Linda Ivany, entered by Elizabeth Kowalski on 12.06.2000, edited by Linda Ivany and Jonathan Marcot

Creative Commons license: CC BY (attribution)

Taxonomic list

• New species only.
Bivalvia
 Ostreida - Pinnidae
Pinna lewisi Waring 1914 oyster
new species
 Pholadida - Corbulidae
"Corbula (Caryocorbula) dickersoni" = Corbula dickersoni
"Corbula (Caryocorbula) dickersoni" = Corbula dickersoni Weaver and Palmer 1922 clam
Gastropoda
 Cephalaspidea - Cylichnidae
"Cylichnina tantilla" = Cylichnella tantilla, "Scaphander (Mirascapha) costatus" = Scaphander costatus
"Cylichnina tantilla" = Cylichnella tantilla Anderson and Hanna 1925 snail
"Scaphander (Mirascapha) costatus" = Scaphander costatus Gabb 1864 snail
 Calyptraeoidea - Calyptraeidae
Calyptraea diegoana Conrad 1857 slipper shell
 Sorbeoconcha - Turritellidae
Turritella uvasana Conrad 1865 turret shell
as Turritella uvasana applinae