CAS 680 - Alverson Cañon [Imperial Fm] (Pliocene of the United States)

Where: Imperial County, California (32.8° N, 116.0° W: paleocoordinates 32.6° N, 114.8° W)

• 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 coarse sandy limestone above coral reef.

• bed-level stratigraphic resolution

Environment/lithology: marine; lithified, sandy limestone

• SPECIFIC LITHOLOGY: Sandy limestone. LITHIFICATION: Unknown.

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 96544: authorized by Austin Hendy, entered by Austin Hendy on 11.06.2010

Creative Commons license: CC BY (attribution)

Taxonomic list

• COVERAGE: Exhaustive for molluscs. NOMENCLATURE: Authoritative publication, with antiquated nomenclature, and species-resolution identifications.
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Bivalvia
 Lucinida - Lucinidae
"Lucina edentuloides" = Pegophysema edentuloides, Codakia colpoica
"Lucina edentuloides" = Pegophysema edentuloides Verrill 1901 clam
Codakia colpoica Dall 1901 clam
 Pectinida - Pectinoidae
"Pecten subnodosus" = Nodipecten subnodosus, "Pecten carrizoensis" = Flabellipecten carrizoensis, "Pecten keepi" = Euvola keepi
"Pecten subnodosus" = Nodipecten subnodosus Sowerby 1836 scallop
"Pecten carrizoensis" = Flabellipecten carrizoensis Arnold 1906 scallop
"Pecten keepi" = Euvola keepi Arnold 1906 scallop
Gastropoda
 Sorbeoconcha - Tonnidae
Malea ringens
Malea ringens Swainson 1822 tun shell
 Sorbeoconcha - Strombidae
"Strombus obliteratus" = Persististrombus obliteratus, Strombus galeatus
"Strombus obliteratus" = Persististrombus obliteratus Hanna 1926 true conch
Strombus galeatus Swainson 1823 conch
 Neogastropoda - Turbinellidae
Vasum caestum
 Cerithioidea - Turritellidae
Turritella imperialis
Turritella imperialis Hanna 1926 turret shell
 Neotaenioglossa - Calyptraeidae
Crucibulum spinosum
Crucibulum spinosum Conrad 1855 slipper shell
 Opisthobranchia - Bullidae
"Bullaria striata" = Bulla striata
"Bullaria striata" = Bulla striata Bruguiére 1792 snail
Echinoidea
 Clypeasteroida - Mellitidae
Encope tenuis
Encope tenuis Kew 1914 sand dollar
 Clypeasteroida - Clypeasteridae
Clypeaster bowersi, Clypeaster deserti
Clypeaster bowersi Weaver 1908 sand dollar
Clypeaster deserti Kew 1914 sand dollar