Rancho El Ocote (Upper): Blancan, Mexico
collected by O. Carranza-Castañeda
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Mammalia
- Perissodactyla
- Equidae
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Nannippus hesperides
Mooser 1968
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Dalquest and Mooser 1980 | |||||||||
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= Nannippus peninsulatus
Cope 1885
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Carranza-Castaneda 1989 | |||||||||
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Equus sp.
Linnaeus 1758
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Dinohippus mexicanus
(Lance 1950)
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MacFadden and Carranza-Castafieda 2002 | |||||||||
| original and current combination Pliohippus (Pliohippus) mexicanus | ||||||||||
| IGM 7596 | ||||||||||
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Mammalia
- Lagomorpha
- Leporidae
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Paranotolagus complicatus
Miller and Carranza-Castaneda 1982
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White 1991 | |||||||||
| from Blancan level | ||||||||||
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Mammalia
- Rodentia
- Sciuridae
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Spermophilus sp.
Cuvier 1825
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| see common names | ||||||||||
Geography
| Country: | Mexico | State/province: | Guanajuato |
| Coordinates: | 21.2° North, 100.7° West (view map) | ||
| Paleocoordinates: | 21.3° North, 100.1° West | ||
| Basis of coordinate: | based on nearby landmark | ||
| Geographic resolution: | outcrop |
Time
| 10 m.y. bin: | Cenozoic 6 | ||
| *Period: | Tertiary | *Epoch: | Pliocene |
| Key time interval: | Blancan | ||
| Age range of interval: | 4.70000 - 1.40000 m.y. ago | ||
| * legacy (obsolete) database fields | |||
Stratigraphy
| Formation: | Rancho Viejo Beds | ||||
| Local section: | Ocote | Local bed: | 3 | ||
| Local order: | bottom to top | ||||
| Stratigraphic resolution: | group of beds | ||||
| Stratigraphy comments: an ash immediately underlying the fauna has an Ar/Ar date of 4.74 +/- 0.14 Ma (Flynn et al. 2005) | |||||
Lithology and environment
| Environment: | terrestrial indet. |
Taphonomy
| Modes of preservation: | body |
Collection methods and comments
| Reason for describing collection: | general faunal/floral analysis |
| Collectors: | O. Carranza-Castañeda |
Metadata
| Database number: | 20076 | ||
| Authorizer: | J. Alroy, P. Mannion | Enterer: | J. Alroy, G. Varnham, J. Wertheim |
| Modifier: | J. Alroy | Research group: | vertebrate |
| Created: | 1995-03-26 00:00:00 | Last modified: | 2007-09-27 16:33:00 |
| Access level: | the public | Released: | 1995-03-26 00:00:00 |
| Creative Commons license: | CC BY |
Reference information
Primary reference:
| 1175. | O. Carranza-Castaneda. 1989. Rinocerontes de la fauna local Rancho el Ocote, Mioceno Tardio (Hemfiliano tardio) de estado de Guanajuato. Universidad Nacional Autónoma de México, Instituto de Geológia, Revista, Publicación Especial 8(1):88-99 [J. Alroy/J. Alroy/M. Uhen] |
Secondary references:
| 1323 | 5% 32840 | W. W. Dalquest and O. Mooser. 1980. Late Hemphillian mammals of the Ocote local fauna, Guanajuato, Mexico. Pearce-Sellards Series 32:1-25 [J. Alroy/J. Alroy/J. Alroy] |
| 23536 | J. J. Flynn, B. J. Kowallis, C. Nuñez, O. Carranza-Castañeda, W. E. Miller, C. C. Swisher, III, and E. Lindsay. 2005. Geochronology of Hemphillian-Blancan aged strata, Guanajuato, Mexico, and implications for the timing of the Great American Biotic Interchange. Journal of Geology 113:287-307 [J. Alroy/J. Alroy/M. Uhen] | |
| 69936 | B. J. MacFadden and O. Carranza-Castafieda. 2002. Cranium of Dinohippus mexicanus (Mammalia: Equidae) from the Early Pliocene (Latest Hemphillian) of Central Mexico, and the origin of Equus. Bulletin of the Florida Museum of Natural History 43(5):163-185 [P. Mannion/G. Varnham/G. Varnham] | |
| 3633 | J. A. White. 1991. North American Leporinae (Mammalia: Lagomorpha) from late Miocene (Clarendonian) to latest Pliocene (Blancan). Journal of Vertebrate Paleontology 11(1):67-89 [J. Alroy/J. Alroy/J. Alroy] |