CSUN Loc. 987 [Juncal Fm] (Eocene of the United States)

Also known as LACMIP Loc. 16175

Where: Ventura County, California (34.5° N, 119.0° W: paleocoordinates 35.2° N, 105.0° W)

• outcrop-level geographic resolution

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

• group of beds-level stratigraphic resolution

Environment/lithology: transition zone or lower shoreface; poorly lithified, lag, argillaceous siltstone and poorly lithified sandstone

• the juncal formation in northern lockwood valley is 605 m thick and consists predominantly of muddy siltstone with minor amounts of sandstone and scattered lenses with fossils. lenses are fine to coarse sandstone representing storm lag deposits.

Size class: macrofossils

Reposited in the LACM

Collection methods: bulk,

• Samples were taken for microfossil (nannos and planktonic forams) collections, but all were barren.

Primary reference: R. L. Squires. 1988. Eocene Macropaleontology of Northern Lockwood Valley, Ventura County, California. Contributions in Science (Natural History Museum of Los Angeles County) 398:1-23 [A. Miller/K. Layou]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 5543: authorized by Arnold Miller, entered by Karen Layou on 12.10.1999

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Anthozoa
 Scleractinia - Caryophylliidae
"Trochocyathus grahami" = Platycyathus grahami
"Trochocyathus grahami" = Platycyathus grahami Durham 1943 stony coral
Bivalvia
 Lucinida - Lucinidae
"Claibornites diegoensis" = Claibornites (Claibornites) diegoensis
"Claibornites diegoensis" = Claibornites (Claibornites) diegoensis Dickerson 1916 clam
 Pholadida - Teredinidae
Teredinidae indet.
Teredinidae indet. Rafinesque 1815 clam
 Arcida - Glycymerididae
"Glycymeris sagittata" = Glycymeris (Glycymerita) sagittata
"Glycymeris sagittata" = Glycymeris (Glycymerita) sagittata Gabb 1864 clam
 Arcida - Arcidae
"Barbatia cf. cliffensis" = Barbatia (Cucullaearca) cliffensis
"Barbatia cf. cliffensis" = Barbatia (Cucullaearca) cliffensis Hanna 1927 clam
[entered as Barbartia cliffensis]
Gastropoda
 Opisthobranchia - Retusidae
Cylichnina tantilla
Cylichnina tantilla Anderson and Hanna 1925 snail
 Sorbeoconcha - Cassidae
"Galeodea (Caliagaleodea) californica" = Galeodea californica
"Galeodea (Caliagaleodea) californica" = Galeodea californica Clark 1942 snail
 Sorbeoconcha - Strombidae
Ectinochilus macilentus
Ectinochilus macilentus White 1889 true conch
 Neogastropoda - Olividae
Olivella mathewsonii
Olivella mathewsonii Gabb 1864 olive snail
 Neogastropoda - Fasciolariidae
Clavilithes tabulatus
Clavilithes tabulatus Dickerson 1913 snail
 Neogastropoda - Cochlespiridae
Apiotoma californiana
Apiotoma californiana Squires 1987 snail
 Neogastropoda - Conidae
Conus remondii
Conus remondii Gabb 1864 cone shell
? in locality information
 Neogastropoda - Clavatulidae
"Cryptoconus cooperi" = Turricula cooperi
"Cryptoconus cooperi" = Turricula cooperi Dickerson 1916 snail
 Sorbeoconcha - Naticidae
Natica uvasana
Natica uvasana Gabb 1864 moon snail
 Cerithioidea - Turritellidae
Turritella buwaldana, Turritella uvasana, Turritella andersoni
Turritella buwaldana Dickerson 1916 turret shell
? in locality information
Turritella uvasana Conrad 1855 turret shell
Turritella uvasana hendoni (s.l.)
Turritella andersoni Dickerson 1916 turret shell
 Architaenioglossa - Ampullinidae
Pachycrommium clarki
Pachycrommium clarki Stewart 1927 snail