LACMIP Loc. 17848 - Elsmere Canyon [Juncal Fm] (Eocene of the United States)

Where: Los Angeles County, California (34.4° N, 118.5° W: paleocoordinates 36.9° N, 101.5° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Juncal Formation, Early/Lower Eocene (55.8 - 48.6 Ma)

• STRATIGRAPHIC RELATIONS: From the Juncal Fm, which unconformably overlies pre-Tertiary gneiss and granitic basement, and is overlain by the Towsley Fm (Pliocene). AGE: late Early Eocene, on the basis of molluscan biostratigraphy. STRATIGRAPHIC POSITION: From near the base of the section.

• bed-level stratigraphic resolution

Environment/lithology: submarine fan; lithified, pebbly sandstone

• ENVIRONMENT: Shallow water marine assemblage redeposited into deeper water, associated with submarine fan environment.
• SPECIFIC LITHOLOGY: Pebby sandstone. LITHIFICATION: Lithified, on the basis of figured specimens.

Size class: macrofossils

Preservation: mold/impression

Collected by Walker et al in 2003-2006; reposited in the LACM

Collection methods: surface (float), surface (in situ),

• COLLECTOR: S. Walker, J. Alderson, and R. Squires, 2003-2006. REPOSITORY: LACMIP, Los Angeles.

Primary reference: R. L. Squires. 2008. Eocene megapaleontology, stratigraphy, and depositional environments, Elsmere Canyon, Los Angeles County, California. Contributions in Science (517)1-16 [A. Hendy/A. Hendy]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 111552: authorized by Austin Hendy, entered by Austin Hendy on 25.06.2011, edited by Katherine Hendy

Creative Commons license: CC BY (attribution)

Taxonomic list

• COVERAGE: Exhaustive for mollusca. NOMENCLATURE: Authoritative publication, with modern nomenclature, and species-resolution identifications.
Gastropoda
 Trochoidea - Solariellidae
Solariella walkeri n. sp. Squires 2008 snail
 Trochoidea - Turbinidae
Homalopoma wattsi Dickerson 1916 snail
 Lepetellida - Fissurellidae
Diodora sp. Gray 1821 snail
 Neotaenioglossa - Calyptraeidae
Calyptraea diegoana Conrad 1855 slipper shell
 Cerithioidea - Turritellidae
Turritella andersoni Dickerson 1916 turret shell
 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 - Olividae
Olivella mathewsonii Gabb 1864 olive snail
 Neogastropoda - Nassariidae
 Neogastropoda - Clavatulidae
"Cryptoconus cooperi" = Turricula cooperi
"Cryptoconus cooperi" = Turricula cooperi Dickerson 1916 snail
 Neogastropoda - Conidae
Conus sp. Linnaeus 1758 cone shell
 Neogastropoda - Turridae
"Pleurofusia fresnoensis" = Pleurotoma fresnoensis
"Pleurofusia fresnoensis" = Pleurotoma fresnoensis Arnold 1909 turrid
 Neogastropoda - Volutidae
Lyria andersoni Waring 1917 volute
 Sorbeoconcha - Ficidae
Ficopsis remondii Gabb 1864 fig shell
SUBSPECIES: Ficopsis remondii cresentensis
 Sorbeoconcha - Cassidae
"Galeodea (Mambrina) susanae" = Galeodea sutterensis
"Galeodea (Mambrina) susanae" = Galeodea sutterensis Dickerson 1916 snail
 Sorbeoconcha - Eocypraeidae
 Sorbeoconcha - Naticidae
? Natica sp. Scopoli 1777 moon snail
 Opisthobranchia - Retusidae
Cylichnina tantilla Anderson and Hanna 1925 snail
Bivalvia
 Arcida - Arcidae
 Arcida - Glycymerididae
 Pectinida - Anomiidae
? Anomia mcgoniglensis Hanna 1927 jingle
 Pectinida - Pectinoidae
Spondylus carlosensis Anderson 1905 scallop
 Ostreida - Ostreidae
Ostrea sp. Linnaeus 1758 oyster
 Lucinida - Lucinidae
"Claibornites diegoensis" = Claibornites (Claibornites) diegoensis, "Miltha packi" = Gibbolucina (Eomiltha) packi
"Claibornites diegoensis" = Claibornites (Claibornites) diegoensis Dickerson 1916 clam
"Miltha packi" = Gibbolucina (Eomiltha) packi Dickerson 1916 clam
 Pholadida - Teredinidae
Teredinidae indet. Rafinesque 1815 clam
 Pholadida - Corbulidae
Corbula (Caryocorbula) dickersoni Weaver and Palmer 1922 clam
 Cardiida - Veneridae
Pitar (Lamelliconcha) joaquinensis Vokes 1939 venus clam
"Pitar (Calipatria) uvasanus" = Pitar uvasana Conrad 1855 venus clam
 Cardiida - Cardiidae
"Nemocardium linteum" = Nemocardium (Nemocardium) linteum, "Acanthocardia (Schedocardia) breweri" = Schedocardia brewerii
"Nemocardium linteum" = Nemocardium (Nemocardium) linteum Conrad 1855 cockle
"Acanthocardia (Schedocardia) breweri" = Schedocardia brewerii Gabb 1864 cockle
 Carditida - Carditidae
 Carditida - Crassatellidae
Crassatella uvasana Conrad 1855 clam
Malacostraca
 Decapoda - Raninidae
Raninidae indet. de Haan 1833 crab