Las Tunas: Blancan, Mexico
collected 1976, 1977
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
unclassified
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cf. Constrictor sp.
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Mammalia
- Lagomorpha
- Leporidae
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Hypolagus cf. vetus
(Kellogg 1910)
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130 specimens | |||||||||
130+specimens | ||||||||||
= Hypolagus vetus
Kellogg 1910
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White 1988 | |||||||||
Mammalia
- Rodentia
- Cricetidae
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Neotoma sp.
Say and Ord 1825
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1 specimen | |||||||||
Mammalia
- Rodentia
- Sciuridae
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Ammospermophilus jeffriesi n. sp.
Miller 1980
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6 specimens | |||||||||
Mammalia
- Carnivora
- Canidae
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Cerdocyon avius
Torres and Ferrusquia 1981
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Munthe 1998 | |||||||||
recombined as Ferrucyon avius | ||||||||||
Borophagus diversidens
Cope 1892
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2 specimens | |||||||||
= Borophagus hilli
Johnston 1939
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Wang et al. 1999 | |||||||||
Mammalia
- Carnivora
- Felidae
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Machairodus sp.
Kaup 1833
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= Machairodontinae indet.
Gill 1872
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Alroy 2002 | |||||||||
very poor specimen also compared to Nimravides and Homotherium without clear differentiation | ||||||||||
Felis sp.
Linnaeus 1758
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4 specimens | |||||||||
= Lynx sp.
Kerr 1792
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Alroy 2002 | |||||||||
replaces ID of Werdelin 1985, implicitly closest to Lynx: "Felis ? lacustris" | ||||||||||
Mammalia
- Perissodactyla
- Equidae
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Equus cf. simplicidens
Cope 1892
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200 specimens | |||||||||
recombined as Plesippus simplicidens | ||||||||||
200+ specimens | ||||||||||
Mammalia
- Cetacea
- Pontoporiidae
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cf. Pontoporiinae indet.
Gray 1870
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1 specimen | |||||||||
Mammalia
- Antilocapridae
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cf. Antilocaprinae indet.
Gray 1866
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Mammalia
- Camelidae
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cf. Camelops sp.
Leidy 1854
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13 specimens | |||||||||
cf. Hemiauchenia sp.
Gervais and Ameghino 1880
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3 specimens | |||||||||
Mammalia
- Proboscidea
- Gomphotheriidae
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Rhynchotherium cf. praecursor
(Cope 1893)
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150 specimens | |||||||||
150+specimens | ||||||||||
Reptilia
- Testudines
- Testudinidae
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Geochelone (Hesperotestudo) sp.
(Williams 1950)
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spelled with current rank as Hesperotestudo | ||||||||||
Reptilia
- Crotalidae
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cf. Crotalus sp.
Linnaeus 1758
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Reptilia
- Colubridae
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? Pituophis sp.
Holbrook 1842
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Reptilia
- Iguanidae
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? Iguanidae indet.
Oppel 1811
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Reptilia
- Accipitriformes
- Accipitridae
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? Buteo sp.
de Lacepède 1799
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Reptilia
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Crocodylus cf. moreletii
(Dumeril and Bibron 1851)
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= Crocodylus sp.
Laurenti 1768
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Brochu 2000 | |||||||||
Amphibia
- Temnospondyli
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Anura indet.
(Fischer von Waldheim 1813)
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see common names |
Geography
Country: | Mexico | State/province: | Baja California Sur |
Coordinates: | 23.3° North, 109.6° West (view map) | ||
Paleocoordinates: | 23.2° North, 108.6° West | ||
Basis of coordinate: | based on nearby landmark |
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
Lithology and environment
Primary lithology: | silty mudstone |
Secondary lithology: | silty sandstone |
Includes fossils? | Y |
Includes fossils? | Y |
Environment: | terrestrial indet. |
Taphonomy
Modes of preservation: | body |
Size of fossils: | macrofossils,mesofossils |
Collection methods and comments
Collection methods: | bulk,surface (float),sieve,field collection |
Collection size: | 509 specimens |
Rock censused: | 1000 kg |
Reason for describing collection: | general faunal/floral analysis | Collection dates: | 1976, 1977 |
Collection method comments: mostly "obtained through surface pick-up... only a little scree-washing was done. Approximately 1,000 kg of matrix was washed... in the sea" | |
Taxonomic list comments:from two major sites and others in an area of "several square kilometers" that span about 30 m of the section NISP 509+ |
Metadata
Also known as: | Las Tunas Wash; Jeffries Site | ||
Database number: | 19673 | ||
Authorizer: | J. Alroy, P. Mannion, M. Uhen | Enterer: | J. Alroy, P. Mannion, M. Uhen |
Modifier: | J. Tennant | Research group: | vertebrate |
Created: | 1993-02-18 00:00:00 | Last modified: | 2013-05-03 10:28:43 |
Access level: | the public | Released: | 1993-02-18 00:00:00 |
Creative Commons license: | CC BY |
Reference information
Primary reference:
2590. | W. E. Miller. 1980. The Late Pliocene Las Tunas Local Fauna from Southernmost Baja California, Mexico. Journal of Paleontology 54(4):762-805 [J. Alroy/J. Alroy/M. Uhen] |
Secondary references:
6294 | J. Alroy. 2002. Synonymies and reidentifications of North American fossil mammals. [J. Alroy/J. Alroy/M. Kouvari] | |
54602 | C. A. Brochu. 2000. Phylogenetic Relationships and Divergence Timing of Crocodylus Based on Morphology and the Fossil Record. Copeia 2000(3):657-673 [P. Mannion/P. Mannion] | |
6233 | K. Munthe. 1998. Canidae. In C. M. Janis, K. M. Scott, and L. L. Jacobs (eds.), Evolution of Tertiary mammals of North America 124-143 [J. Alroy/J. Alroy/J. Alroy] | |
46663 | V.-H. Reynoso. 2006. Research on fossil amphibians and reptiles in Mexico, from 1869 to early 2004 (including marine forms but excluding pterosaurs, dinosaurs, and obviously, birds). In F. J. Vega, T. G. Nyborg, M. Del Carmen Perrilliat, M. Montellano-Ballesteros, S. R. S. Cevallos-Ferriz, S. A. Quiroz-Barroso (eds.), Studies on Mexican Paleontology 24:209-231 [P. Mannion/J. Tennant] | |
3558 | X. Wang, R. H. Tedford, and B. E. Taylor. 1999. Phylogenetic systematics of the Borophaginae (Carnivora: Canidae). Bulletin of the American Museum of Natural History 243:1-392 [J. Alroy/J. Alroy/J. Alroy] | |
3632 | J. A. White. 1988. The Archaeolaginae (Mammalia, Lagomorpha) of North America, Excluding Archaeolagus and Panolax. Journal of Vertebrate Paleontology 7(4):425-450 [J. Alroy/J. Alroy/J. Ju] |