CAS 682 - Alverson Cañon [Imperial Fm] (Pliocene of the United States)

Where: Imperial County, California (32.8° N, 116.0° W)

• Paleocoordinates: 33.6° N, 114.3° W (Wright 2013)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Early/Lower Pliocene (5.3 - 3.6 Ma)

• STRATIGRAPHIC RELATIONS: From the Imperial Formation, for which lithostratigraphic relationships are not discussed. AGE: Early Pliocene, based on existing (more recent) collections. STRATIGRAPHIC POSITION: From the coral reef which crosses the canon toward its source.

• bed-level stratigraphic resolution

Environment/lithology: marine; lithified sandstone

• SPECIFIC LITHOLOGY: Sandstone. LITHIFICATION: Poorly lithified, on the basis of figured specimens.

Size class: macrofossils

Reposited in the CAS

Collection methods: bulk,

• COLLECTORS: G.D. Hanna. REPOSITORY: CAS.

Primary reference: G. D. Hanna. 1926. Paleontology of Coyote Mountain, Imperial County, California. Proceedings of the California Academy of Sciences 14(18):427-503 [A. Hendy/A. Hendy]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 96546: authorized by Austin Hendy, entered by Austin Hendy on 11.06.2010

Creative Commons license: CC0 (CC0)

Taxonomic list

• COVERAGE: Exhaustive for molluscs. NOMENCLATURE: Authoritative publication, with antiquated nomenclature, and species-resolution identifications.
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Echinoidea
 Clypeasteroida - Clypeasteridae
Clypeaster bowersi
Clypeaster bowersi Weaver 1908 sand dollar
Bivalvia
 Arcida - Glycymerididae
"Glycymeris gigantea" = Glycymeris (Glycymeris) gigantea
"Glycymeris gigantea" = Glycymeris (Glycymeris) gigantea Reeve 1843 clam
 Ostreida - Ostreidae
"Ostrea vespertina" = Dendostrea vespertina
"Ostrea vespertina" = Dendostrea vespertina Conrad 1855 oyster
 Pectinida - Pectinoidae
"Pecten keepi" = Euvola keepi, "Pecten carrizoensis" = Flabellipecten carrizoensis
"Pecten keepi" = Euvola keepi Arnold 1906 scallop
"Pecten carrizoensis" = Flabellipecten carrizoensis Arnold 1906 scallop
 Carditida - Crassatellidae
"Crassatellites subgibbosus n. sp." = Hybolophus subgibbosa
"Crassatellites subgibbosus n. sp." = Hybolophus subgibbosa Hanna 1926 clam
 Cardiida - Chamidae
"Echinochama californica" = Arcinella californica
"Echinochama californica" = Arcinella californica Dall 1903 jewel box
 Cardiida - Veneridae
Dosinia dunkeri
Dosinia dunkeri Philippi 1844 venus clam
 Hiatellida - Hiatellidae
"Panope generosa" = Panopea generosa
"Panope generosa" = Panopea generosa Gould 1850 clam
 Lucinida - Lucinidae
Codakia colpoica, "Divaricella eburnea" = Divalinga eburnea
Codakia colpoica Dall 1901 clam
"Divaricella eburnea" = Divalinga eburnea Reeve 1850 clam
Gastropoda
 Opisthobranchiata - Bullidae
"Bullaria striata" = Bulla striata
"Bullaria striata" = Bulla striata Bruguiére 1792 snail
 Neritoidea - Neritidae
Neritina picta
Neritina picta Sowerby 1832 snail
 Sorbeoconcha - Tonnidae
Malea ringens
Malea ringens Swainson 1822 tun shell
 Sorbeoconcha - Strombidae
Strombus galeatus, "Strombus gracilior" = Strombus (Strombus) gracilior, "Strombus obliteratus n. sp." = Persististrombus obliteratus
Strombus galeatus Swainson 1823 conch
"Strombus gracilior" = Strombus (Strombus) gracilior Sowerby 1825 conch
"Strombus obliteratus n. sp." = Persististrombus obliteratus Hanna 1926 true conch
 Neogastropoda - Turbinellidae
Vasum caestum
 Neogastropoda - Conidae
Conus regularis
Conus regularis Sowerby 1841 cone shell
 Neogastropoda - Terebridae
Terebra protexta
Terebra protexta Conrad 1845 auger snail
 Neogastropoda - Olividae
Oliva spicata
Oliva spicata Durham 1950 olive snail
 Sorbeoconcha - Ficidae
Ficus decussata
Ficus decussata Wood 1828 fig shell
 Sorbeoconcha - Naticidae
"Natica unifasciata" = Natica (Naticarius) unifasciata, "Natica uber" = Polinices uber
"Natica unifasciata" = Natica (Naticarius) unifasciata Lamarck 1822 moon snail
"Natica uber" = Polinices uber Valenciennes 1821 moon snail
 Cerithioidea - Turritellidae
Turritella imperialis, Vermicularia ebunea
Turritella imperialis Hanna 1926 turret shell
Vermicularia ebunea turret shell
 Cerithioidea - Modulidae
Modulus unidens
 Cerithioidea - Cerithiidae
Cerithium incisum
Cerithium incisum Sowerby 1855 cerith snail
 Neotaenioglossa - Calyptraeidae
Crucibulum spinosum
Crucibulum spinosum Conrad 1855 slipper shell