LACM 1952/LACM 1953, San Marcos (Pleistocene of Mexico)

Where: Jalisco, Mexico (20.3° N, 103.6° W: paleocoordinates 20.3° N, 103.6° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

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

• Deposits on both sides of the small island are part of the same lake bed, and the fossils occurred in undisturbed material in the bottom of the lake. Large mammalian fauna is typical of the Late Pleistocene.

Environment/lithology: lacustrine; lithology not reported

Size class: macrofossils

Collected in 1964-1965; reposited in the LACM

Primary reference: H. Howard. 1969. Avian fossils from three Pleistocene sites in central Mexico. Los Angeles County Museum Contributions in Science 172:1-11 [J. Alroy/K. Sears/M. Uhen]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 192628: authorized by Matthew Clapham, entered by Matthew Clapham on 14.04.2018

Creative Commons license: CC BY (attribution)

Taxonomic list

Aves
 Anseriformes - Anatidae
"Chen hyperborea" = Anser caerulescens Linnaeus 1758 snow goose
Aythya affinis Eyton 1838 lesser scaup
Anas acuta Linnaeus 1758 northern pintail
 Suliformes - Phalacrocoracidae
Phalacrocorax sp. Brisson 1760 cormorant
 Ciconiiformes - Ciconiidae
Mycteria ? wetmorei Howard 1935 stork
 Pelecaniformes - Pelecanidae
Pelecanus erythrorhynchos Gmelin 1789 American white pelican
 Pelecaniformes - Ardeidae
Ardea herodias Linnaeus 1758 great blue heron
 Phoenicopteriformes - Phoenicopteridae
Phoenicopterus sp. Linnaeus 1758 flamingo
 Accipitriformes - Accipitridae
Buteogallus fragilis Miller 1911 black-hawks