CSUN Loc. 983 [Juncal Fm] (Eocene of the United States)

Where: Ventura County, California (34.8° N, 119.2° W: paleocoordinates 35.5° N, 105.1° 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,

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 5541: 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
Gastropoda
 Heterostropha - Architectonicidae
"Architectonica cognata" = Architectonica (Stellaxis) cognata
"Architectonica cognata" = Architectonica (Stellaxis) cognata Gabb 1864 sundial
 Cerithioidea - Turritellidae
Turritella buwaldana, Turritella andersoni
Turritella buwaldana Dickerson 1916 turret shell
Turritella andersoni Dickerson 1916 turret shell
 Architaenioglossa - Ampullinidae
Pachycrommium clarki
Pachycrommium clarki Stewart 1927 snail
 Neotaenioglossa - Calyptraeidae
Calyptraea diegoana
Calyptraea diegoana Conrad 1855 slipper shell
 Sorbeoconcha - Ficidae
"Ficopsis crescentensis" = Ficopsis remondii crescentensis
"Ficopsis crescentensis" = Ficopsis remondii crescentensis Weaver and Palmer 1922 fig shell
Ficopsis remondii crescentensis
 Sorbeoconcha - Cassidae
"Galeodea aff. nodosa" = Galeodea (Mambrinia) nodosa
"Galeodea aff. nodosa" = Galeodea (Mambrinia) nodosa Solander in Brander 1766 snail
as ssp. "Galeodea aff. G. nodosa carinata"
 Sorbeoconcha - Strombidae
Ectinochilus macilentus
Ectinochilus macilentus White 1889 true conch
 Neogastropoda - Clavatulidae
"Cryptoconus cooperi" = Turricula cooperi
"Cryptoconus cooperi" = Turricula cooperi Dickerson 1916 snail
 Neogastropoda - Cochlespiridae
Apiotoma californiana
Apiotoma californiana Squires 1987 snail
 Sorbeoconcha - Naticidae
Sinum obliquum
Sinum obliquum Gabb 1864 moon snail
 Trochoidea - Turbinidae
Arene mcleani n. sp.
Arene mcleani n. sp. Squires 1988 snail
 Opisthobranchia - Retusidae
Cylichnina tantilla
Cylichnina tantilla Anderson and Hanna 1925 snail
Bivalvia
 Nuculida - Nuculidae
Acila decisa
Acila decisa Conrad 1855 divaricate nutclam
 Pectinida - Propeamussiidae
Parvamussium sp.
Parvamussium sp. Sacco 1897 mud scallop
 Arcida - Glycymerididae
"Glycymeris sagittata" = Glycymeris (Glycymerita) sagittata
"Glycymeris sagittata" = Glycymeris (Glycymerita) sagittata Gabb 1864 clam
 Cardiida - Veneridae
Pitar joaquinensis
Pitar joaquinensis Vokes 1939 venus clam
 Cardiida - Cardiidae
"Nemocardium linteum" = Nemocardium (Nemocardium) linteum
"Nemocardium linteum" = Nemocardium (Nemocardium) linteum Conrad 1855 cockle