Locality 11 (Miocene of Mexico)

Where: Baja California, Mexico (28.1° N, 115.2° W: paleocoordinates 26.7° N, 111.7° W)

• coordinate based on political unit

• local area-level geographic resolution

When: lower Member (Almejas Formation), Messinian (7.2 - 5.3 Ma)

• Detailed stratigraphic column shown in Figure 2 of Barnes (1984). Max and min dates after Boessenecker (2013).

Environment/lithology: coastal; lithology not reported

• no lithological description given

Size class: macrofossils

Preservation: original phosphate

Collection methods: quarrying,

Primary reference: L. G. Barnes. 1984. Fossil odontocetes (Mammalia: Cetacea) from the Almejas Formation, Isla Cedros, Mexico. PaleoBios 42:1-46 [M. Uhen/M. Uhen/M. Uhen]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 45458: authorized by Mark Uhen, entered by Mark Uhen on 24.10.2004

Creative Commons license: CC BY (attribution)

Taxonomic list

Chondrichthyes
 Plagiostomi - Squalidae
"Carcharocles megalodon" = Otodus megalodon1
"Carcharocles megalodon" = Otodus megalodon1 Agassiz 1843 megalodon
possibly from 45460 instead of 45458
 Lamniformes - Lamnidae
Carcharodon cf. carcharias1 Linnaeus 1758 great white shark
possibly from 45460 instead of 45458
 Carchariniformes - Carcharhinidae
Carcharhinus sp.1 de Blainville 1816 requiem shark
possibly from 45460 instead of 45458
Aves
 Charadriiformes - Panalcidae
? Synthliboramphus sp.1 Brandt 1837 auk
possibly from 45460 instead of 45458
Mancalla cedrosensis1 Howard 1971 auk
possibly from 45460 instead of 45458
Cerorhinca minor1 Howard 1971 auk
possibly from 45460 instead of 45458
 Procellariiformes - Procellariidae
Puffinus sp.1 Brisson 1760 shearwater
possibly from 45460 instead of 45458
Puffinus tedfordi1 Howard 1971 shearwater
possibly from 45460 instead of 45458
 Phoenicopteriformes - Palaelodidae
? Megapaloelodus opsigonus1 Brodkorb 1961 flamingo
possibly from 45460 instead of 45458
 Suliformes - Sulidae
Morus sp.1 Vieillot 1816 gannet
possibly from 45460 instead of 45458
Mammalia
 Carnivora - Odobenidae
Aivukus cedrosensis n. gen. n. sp.3 Repenning and Tedford 1977 walrus
possibly from 45460 instead of 45458
Dusignathinae indet.1 Mitchell 1968 walrus
possibly from 45460 instead of 45458
Dusignathus santacruzensis3 Kellogg 1927 walrus
 Carnivora - Otariidae
Thalassoleon mexicanus1 Repenning and Tedford 1977 eared seal
possibly from 45460 instead of 45458
 Cetacea - Balaenopteridae
Balaenoptera sp.1 Lacépède 1804 rorqual
possibly from 45460 instead of 45458
aff. Plesiocetus sp.1 Van Beneden 1859 rorqual
possibly from 45460 instead of 45458
 Cetacea - Albireonidae
Albireo sp.2 Barnes 1984 toothed whale
 Cetacea - Monodontidae
Denebola brachycephala n. gen. n. sp.
Denebola brachycephala n. gen. n. sp. Barnes 1984 toothed whale
 Cetacea - Phocoenidae
Phocoenidae indet.1 Gray 1825 porpoise
Piscolithax boreios n. sp. Barnes 1984 porpoise
Piscolithax tedfordi n. sp. Barnes 1984 porpoise
 Cetacea - Lipotidae
Parapontoporia pacifica n. gen. n. sp.
Parapontoporia pacifica n. gen. n. sp. Barnes 1984 toothed whale