UCMP A-9596, Punta China (Pleistocene of Mexico)

Where: Mexico (31.5° N, 116.6° W: paleocoordinates 31.5° N, 116.7° W)

• coordinate estimated from map

• outcrop-level geographic resolution

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

• Fossils from 1-3-foot stratum, resting unconformably on Cretaceous rocks, at about 12 to 15 feet in elevation above sea level, and overlain by 10 feet of poorly sorted, locally fossiliferous sands.

• group of beds-level stratigraphic resolution

Environment/lithology: coastal; poorly lithified, coarse-grained, conglomeratic sandstone

• Reddish brown weathering, poorly sorted, coarse-grained sand containing boulders up to 18 inches in diameter.

Size class: macrofossils

Collected by W.K. Emerson, W.O. Addicott in 1952; reposited in the UCMP

Primary reference: W. K. Emerson. 1956. Pleistocene invertebrates from Punta China, Baja California, Mexico, with remarks on the composition of the Pacific coast Quaternary faunas. Bulletin of the American Museum of Natural History 111:313-342 [M. Clapham/M. Clapham/M. Clapham]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 226467: authorized by Matthew Clapham, entered by Matthew Clapham on 09.07.2022

Creative Commons license: CC BY (attribution)

Taxonomic list

Gastropoda
 Neotaenioglossa - Calyptraeidae
Crepidula adunca Sowerby 1824 slipper shell
 Neogastropoda - Olividae
"Olivella biplicata" = Callianax biplicata
"Olivella biplicata" = Callianax biplicata Sowerby 1825 olive snail
 Neogastropoda - Conidae
"Conus californicus" = Californiconus californicus
"Conus californicus" = Californiconus californicus Reeve 1844 cone shell
 Neogastropoda - Columbellidae
Amphissa versicolor Dall 1871 snail
 Sorbeoconcha - Vermetidae
"Aletes squamigerus" = Thylacodes squamigerus
"Aletes squamigerus" = Thylacodes squamigerus Carpenter 1857 worm shell
 Sorbeoconcha - Hipponicidae
Hipponix antiquatus Linnaeus 1767 hoof shell
 Patellida - Lottiidae
Acmaea mitra Eschscholtz 1833 limpet
 Lepetellida - Haliotidae
Haliotis ? rufescens Swainson 1822 abalone
 Lepetellida - Fissurellidae
Fissurella volcano Reeve 1849 snail
Diodora aspera Rathke 1833 snail
 Trochoidea - Trochidae
"Tegula brunnea" = Chlorostoma brunnea
"Tegula brunnea" = Chlorostoma brunnea Philippi 1849 top snail
 Trochoidea - Turbinidae
"Homalopoma carpenteri" = Homalopoma (Homalopoma) luridum
"Homalopoma carpenteri" = Homalopoma (Homalopoma) luridum Dall 1885 snail
Bivalvia
 Carditida - Carditidae
Glans carpenteri Lamy 1922 clam
 Cardiida - Veneridae
"Protothaca staminea" = Leukoma staminea
"Protothaca staminea" = Leukoma staminea Conrad 1837 venus clam
 Hiatellida - Hiatellidae
"Saxicava arctica" = Hiatella arctica
"Saxicava arctica" = Hiatella arctica Linnaeus 1767 clam
 Lucinida - Lucinidae
"Lucina californica" = Epilucina californica
"Lucina californica" = Epilucina californica Conrad 1837 clam
 Pectinida - Anomiidae
 Pectinida - Pectinoidae
"Hinnites multirugosus" = Crassadoma gigantea
"Hinnites multirugosus" = Crassadoma gigantea Gray 1825 scallop
 Mytilida - Mytilidae
"Modiolus fornicatus" = Modiolus carpenteri, Mytilus californianus
"Modiolus fornicatus" = Modiolus carpenteri Soot-Ryen 1963 mussel
Mytilus californianus Conrad 1837 mussel
Thecostraca
 Balanomorpha - Balanidae
Balanus cf. nubilus Darwin 1854 barnacle