Punta Pequena (Miocene to of Mexico)

Also known as UCMP V5023

Where: Baja California Sur, Mexico (26.2° N, 112.5° W: paleocoordinates 25.6° N, 108.0° W)

• coordinate based on unpublished field data

• outcrop-level geographic resolution

When: Ysidro Formation, Langhian to Langhian (16.0 - 11.6 Ma)

Environment/lithology: marine; gray sandstone

• gray sandstone, in blocky blue clay, specimens in gray sand lenses in clay

Size class: macrofossils

Collection methods: near ocean shore two or three feet above ocean level

Primary reference: R. H. Reinhart. 1959. A review of the Sirenia and Desmostylia. University of California Publications in Geological Sciences 36(1):1-146 [M. Uhen/M. Uhen/M. Uhen]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 13450: authorized by Mark Uhen, entered by Mark Uhen on 22.03.2002

Creative Commons license: CC BY (attribution)

Taxonomic list

 Cardiida - Veneridae
Chione sp.1 von Mühlfield 1811 venus clam
 Lucinida - Lucinidae
Lucina sp.1 Bruguière 1797 clam
 Sorbeoconcha - Turritellidae
Turritella sp.1 Lamarck 1799 turret shell
 Odontaspidida - Alopiidae
Alopias sp.1 Rafinesque 1810 thresher shark
 Myliobatiformes - Dasyatidae
Dasyatis sp.1 Rafinesque 1810 whiptail stingray
 Myliobatiformes - Myliobatidae
Myliobatis sp.1 Cuvier 1816 eagle ray
 Lamniformes - Cetorhinidae
Cetorhinus sp.1 de Blainville 1816 basking shark
 Lamniformes - Otodontidae
"Carcharodon megalodon" = Otodus megalodon1
"Carcharodon megalodon" = Otodus megalodon1 Agassiz 1843 megalodon
 Lamniformes - Lamnidae
Isurus sp.1 Agassiz 1843 mako shark
 Carchariniformes - Carcharhinidae
Negaprion sp.1 Whitley 1940 lemon shark
Galeocerdo aduncus1 Agassiz 1843 tiger shark
Carcharhinus sp.1 de Blainville 1816 requiem shark
 Carchariniformes - Hemigaleidae
"Hemipristis serra" = Hemipristis heteropleurus1
"Hemipristis serra" = Hemipristis heteropleurus1 Agassiz 1844 ground shark
 Carangiformes - Carangidae
cf. Caranx sp.1 Lacépède 1802
 Tetraodontiformes -
 Sirenia - Dugongidae
Dusisiren reinharti n. sp.1 Domning 1978 dugong
 Perissodactyla - Desmostylidae
Desmostylus hesperus2 Marsh 1888 desmostylian
 Clypeasteroida - Dendrasteridae
"cf. Merriamaster pacificus" = Dendraster pacificus1
"cf. Merriamaster pacificus" = Dendraster pacificus1 Kew 1920 sand dollar