Rancho La Brisca: Late/Upper Pleistocene, Mexico

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Mammalia - Proboscidea - Elephantidae
Mammuthus sp. Brookes 1828
2 specimens
Mammalia - Carnivora - Procyonidae
Bassariscus sp. Coues 1887
1 specimen
Mammalia - Perissodactyla - Equidae
Equus cf. tau Owen 1869
7 specimens
    = Equus sp. Linnaeus 1758
Alroy 2002
i.d. based entirely on small size
Equus sp. Linnaeus 1758
1 specimen
large
Mammalia - Camelidae
Camelops sp. Leidy 1854
1 specimen
Mammalia - Cervidae
Odocoileus hemionus (Rafinesque 1817)
1 specimen
Mammalia - Antilocapridae
Capromeryx cf. minor Taylor 1911
1 specimen
Tetrameryx sp. Lull 1921
1 specimen
Mammalia - Bovidae
Bison sp. Hamilton-Smith 1827
3 specimens
Mammalia - Rodentia - Heteromyidae
Dipodomys sp. Gray 1841
1 specimen
Mammalia - Rodentia - Cricetidae
Sigmodon sp. Say and Ord 1825
4 specimens
Neotoma sp. Say and Ord 1825
1 specimen
Onychomys sp. Baird 1858
1 specimen
see common names

Geography
Country:Mexico State/province:Sonora
Coordinates: 29.4° North, 111.0° West (view map)
Paleocoordinates:29.4° North, 111.0° West
Basis of coordinate:based on nearby landmark
Geographic resolution:small collection
Time
Period:Quaternary Epoch:Pleistocene
10 m.y. bin:Cenozoic 6
*Local age/stage:Sangamonian
Key time interval:Late/Upper Pleistocene
Age range of interval:0.12600 - 0.01170 m.y. ago
* legacy (obsolete) database fields
Stratigraphy
Stratigraphy comments: said to be Sangamonian
Lithology and environment
Environment:terrestrial indet.
Glacial or sequence phase:interglacial
Taphonomy
Modes of preservation:body
Collection methods and comments
Collection size:24 specimens
Taxonomic list comments:screen washed; samples from 5 m mudstone section
total mammalian NISP reported as 26, but only 24 are identified
said to be Sangamonian based on interglacial aspect of herpetofauna and co-occurrence of Bison with extinct megafauna
Metadata
Also known as:UALP 7627
Database number:20633
Authorizer:J. Alroy Enterer:J. Alroy
Modifier:J. Alroy Research group:vertebrate
Created:1997-04-12 00:00:00 Last modified:2007-09-17 17:46:40
Access level:the public Released:1997-04-12 00:00:00
Creative Commons license:CC BY
Reference information

Primary reference:

3477. T. R. Van Devender, A. M. Rea, and M. L. Smith. 1985. The Sangamon interglacial vertebrate fauna from Rancho la Brisca, Sonora, Mexico. Transactions of the San Diego Society of Natural History 21(2):23-55 [J. Alroy/J. Alroy/J. Marcot]

Secondary references:

6294 J. Alroy. 2002. Synonymies and reidentifications of North American fossil mammals. [J. Alroy/J. Alroy/M. Kouvari]