CSUN Loc. 447, Las Llajas Canyon, Santa Susana Mountains (Eocene of the United States)

Where: Ventura County, California (34.3° N, 118.7° W: paleocoordinates 35.1° N, 104.6° W)

• coordinate estimated from map

• small collection-level geographic resolution

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

• The stewart bed is a 1 m thick sandstone unit in the middle of the LLajas formation. Lutetian, chron 21r according to Squires (2001).

• 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,

• 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 200838: authorized by Jonathan Marcot, entered by Jonathan Marcot on 22.04.2019

Creative Commons license: CC BY (attribution)

Taxonomic list

Anthozoa
 Scleractinia - Acrosmiliidae
"? Trochocyathus striatus" = Trochosmilia (Acrosmilia) striata
"? Trochocyathus striatus" = Trochosmilia (Acrosmilia) striata Gabb 1864 stony coral
Bivalvia
 Ostreida - Malleidae
 Carditida - Crassatellidae
Crassatella uvasana Conrad 1855 clam
Scaphopoda
 Dentaliida - Dentaliidae
Dentalium stentor Anderson and Hanna 1925 tusk shell
Gastropoda
 Heterostropha - Architectonicidae
 Architaenioglossa - Ampullinidae
Eocernina hannibali Dickerson 1914 snail
Pachycrommium clarki Stewart 1927 snail
 Sorbeoconcha - Strombidae
"Ectinochilus (Macilentos) macilentus" = Rimella macilenta
"Ectinochilus (Macilentos) macilentus" = Rimella macilenta White 1889 true conch
 Neogastropoda - Turridae
Surculites mathewsonii Gabb 1864 turrid
 Sorbeoconcha - Cassidae
"Galeodea (Caliagaleodea) californica" = Galeodea californica
"Galeodea (Caliagaleodea) californica" = Galeodea californica Clark 1942 snail
 Cerithioidea - Turritellidae
Turritella andersoni Dickerson 1916 turret shell
as Turritella andersoni lawsoni