UCMP A-9546a, south of Punta China (Pleistocene of Mexico)

Where: Mexico (31.5° N, 116.6° W)

• coordinate estimated from map

• outcrop-level geographic resolution

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

• Fossils from thin stratum capping (?) upper Cretaceous rock, at an elevation of about 25 feet above sea level

• group of beds-level stratigraphic resolution

Environment/lithology: coastal; poorly lithified, pebbly sandstone

• Well sorted pebbly sand

Size class: macrofossils

Collected by W.K. Emerson in 1953; 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 226468: authorized by Matthew Clapham, entered by Matthew Clapham on 09.07.2022

Creative Commons license: CC0 (CC0)

Taxonomic list

Echinoidea
 Camarodonta - Strongylocentrotidae
Strongylocentrotus cf. purpuratus Stimpson 1857 sea urchin
Bivalvia
 Carditida - Carditidae
Glans carpenteri Lamy 1922 clam
Gastropoda
 Trochoidea - Trochidae
"Tegula funebralis" = Chlorostoma funebrale, "Tegula brunnea" = Chlorostoma brunnea
"Tegula funebralis" = Chlorostoma funebrale Adams 1855 top snail
"Tegula brunnea" = Chlorostoma brunnea Philippi 1849 top snail
 Lepetellida - Haliotidae
"Haliotis cracherodi" = Haliotis cracherodii
"Haliotis cracherodi" = Haliotis cracherodii Leach 1814 abalone
 Lepetellida - Fissurellidae
Fissurella volcano Reeve 1849 snail
 Patellida - Lottiidae
Acmaea mitra, "Acmaea insessa" = Lottia insessa, "Acmaea asmi" = Lottia asmi, "Acmaea scabra" = Lottia scabra, "Acmaea scutum" = Lottia scutum
Acmaea mitra Eschscholtz 1833 limpet
"Acmaea insessa" = Lottia insessa Hinds 1842 limpet
"Acmaea asmi" = Lottia asmi Middendorff 1847 limpet
"Acmaea scabra" = Lottia scabra Gould 1846 limpet
"Acmaea scutum" = Lottia scutum Eschscholtz 1833 limpet
 Neogastropoda - Columbellidae
"Mitrella carinata" = Alia carinata
"Mitrella carinata" = Alia carinata Hinds 1844 dovesnail
 Neogastropoda - Muricidae
"Acanthina lugubris" = Mexacanthina lugubris
"Acanthina lugubris" = Mexacanthina lugubris Sowerby I 1822 murex snail
 Sorbeoconcha - Hipponicidae
Hipponix cranioides hoof shell
Hipponix antiquatus var. cranioides
Hipponix antiquatus Linnaeus 1767 hoof shell