A-4878, Punta PeƱasco (Pleistocene of Mexico)

Where: Sonora, Mexico (31.3° N, 113.6° W: paleocoordinates 31.3° N, 113.5° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Late/Upper Pleistocene (0.1 - 0.0 Ma)

• STRATIGRAPHIC RELATIONS: From an unknown lithostratigraphic unit, which unconformably overlies granitic rocks. AGE: Late Pleistocene, on the basis of molluscan biostratigraphy. STRATIGRAPHIC POSITION: Fossiliferous stratum exposed in railroad cut.

• bed-level stratigraphic resolution

Environment/lithology: coastal; lithified, shelly/skeletal sandstone

• SPECIFIC LITHOLOGY: Fossiliferous sandstone. LITHIFICATION: Lithified, on the basis of facies description.

Size class: macrofossils

Collected by Gifford in 1948

• COLLECTOR: E.W. Gifford. REPOSITORY: Unknown, possible SDNHM.

Primary reference: L. G. Hertlein. 1956. Marine Pleistocene Invertebrates from near Puerto Penasco, Sonora, Mexico. Transactions of the San Diego Society of Natural History 12(8):154-176 [A. Hendy/A. Hendy]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 96561: authorized by Austin Hendy, entered by Austin Hendy on 12.06.2010

Creative Commons license: CC BY (attribution)

Taxonomic list

• COVERAGE: Not an authoritative publication, with somewhat antiquated nomenclature, but with species-resolution identifications
Bivalvia
 Arcida - Noetiidae
"Arca solida" = Arcopsis solida
"Arca solida" = Arcopsis solida Sowerby I 1833 clam
 Ostreida - Ostreidae
"Ostrea palmula" = Saccostrea palmula Carpenter 1857 oyster
Ostrea cf. angelica Rochebrune 1895 oyster
Ostrea conchaphila Carpenter 1857 oyster
 Mytilida - Mytilidae
"Brachidontes multiformis" = Mytilus multiformis
"Brachidontes multiformis" = Mytilus multiformis Carpenter 1857 mussel
 Lucinida - Lucinidae
"Lucina lampra" = Cavilinga lampra
"Lucina lampra" = Cavilinga lampra Dall 1901 clam
 Pholadida - Corbulidae
"Corbula nasuta" = Caryocorbula nasuta
"Corbula nasuta" = Caryocorbula nasuta Sowerby 1833 clam
 Cardiida - Veneridae
Megapitaria squalida Sowerby 1833 venus clam
Dosinia ponderosa Gray 1838 venus clam
Chione californiensis Broderip and Sowerby I 1835 venus clam
"Protothaca grata" = Leukoma grata Say 1831 venus clam
 Cardiida - Cardiidae
"Cardium procerum" = Mexicardia procera
"Cardium procerum" = Mexicardia procera Sowerby 1833 cockle
 Cardiida - Semelidae
 Carditida - Carditidae
"Glans affinis" = Carditamera affinis
"Glans affinis" = Carditamera affinis Sowerby 1823 clam
SUBSPECIES: Glans affinis californica
Gymnolaemata
 Cheilostomata - Antroporidae