B-1397, 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 sandstone 1 to 6 feet in thickness.

• 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

Collection methods: COLLECTOR: W. K. Emerson, A. P. Loring, and J. A. Powell, 1954. 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 96559: 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
Thecostraca
 Balanomorpha - Balanidae
Balanus sp. Da Costa 1778 barnacle
Gymnolaemata
 Cheilostomata - Antroporidae
Antropora tincta Hastings 1930
Bivalvia
 Cardiida - Veneridae
"Protothaca grata" = Leukoma grata, Chione californiensis
"Protothaca grata" = Leukoma grata Say 1831 venus clam
Chione californiensis Broderip and Sowerby I 1835 venus clam
 Cardiida - Ungulinidae
Diplodonta orbella Gould 1851 clam
 Carditida - Carditidae
"Glans affinis" = Carditamera affinis
"Glans affinis" = Carditamera affinis Sowerby 1823 clam
SUBSPECIES: Glans affinis californica
 Arcida - Arcidae
"Arca gradata" = Barbatia (Acar) gradata
"Arca gradata" = Barbatia (Acar) gradata Broderip and Sowerby 1829 miniature ark
 Ostreida - Ostreidae
Ostrea angelica, "Ostrea palmula" = Saccostrea palmula
Ostrea angelica Rochebrune 1895 oyster
"Ostrea palmula" = Saccostrea palmula Carpenter 1857 oyster
Gastropoda
 Patellida - Lottiidae
 Trochoidea - Tegulidae
 Trochoidea - Turbinidae
"Turbo fluctuosus" = Turbo (Callopoma) fluctuosus
"Turbo fluctuosus" = Turbo (Callopoma) fluctuosus Wood 1828 snail
 Sorbeoconcha - Naticidae
"Polinices reclusianus" = Glossaulax reclusiana
"Polinices reclusianus" = Glossaulax reclusiana Deshayes 1839 moon snail
 Neogastropoda - Muricidae
Acanthina muricata unicorn
SUBSPECIES: Acanthina muricata tuberculata
Muricanthus nigritus Philippi 1845 murex snail
SUBSPECIES: Murex cf. radix nigritus