El Rosario: Late/Upper Campanian, Mexico
collected by H. Garbani, M. Greenwald 1970, 1973
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Amphibia
- Temnospondyli
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Scotiophryne sp.
Estes 1969
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Estes and Sanchíz 1982 | |||||||||
Mammalia
- Multituberculata
- Neoplagiaulacidae
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Mesodma cf. formosa
(Marsh 1889)
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3 specimens | |||||||||
Mammalia
- Multituberculata
- Eucosmodontidae
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? Stygimys sp.
Sloan and Van Valen 1965
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1 specimen | |||||||||
"n. sp." | ||||||||||
Mammalia
- Zhelestidae
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Gallolestes pachymandibularis n. gen., n. sp.
Lillegraven 1976
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Lillegraven 1976 | 4 specimens | ||||||||
from LACM 3302; also at LACM 3310, LACM 7172: Clemens 1980 | ||||||||||
Mammalia
- Pediomyidae
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Pediomys sp.
Marsh 1889
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Clemens et al. 1979 | |||||||||
= Pediomyidae indet.
Simpson 1927
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Alroy 2007 | |||||||||
Reptilia
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Naomichelys sp.
Hay 1908
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Reynoso 2006 | |||||||||
Reptilia
- Polyglyphanodontidae
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Polyglyphanodon bajaensis n. sp.
Nydam 1999
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Nydam 1999 | |||||||||
recombined as Dicothodon bajaensis | ||||||||||
type from LACM LAV-7170, also at LACM LAV-7272 | ||||||||||
see common names |
Geography
Country: | Mexico | State/province: | Baja California |
Coordinates: | 30.2° North, 115.8° West (view map) | ||
Paleocoordinates: | 35.7° North, 86.5° West | ||
Basis of coordinate: | based on nearby landmark | ||
Geographic resolution: | outcrop |
Time
Period: | Cretaceous | Epoch: | Late/Upper Cretaceous |
Stage: | Campanian | 10 m.y. bin: | Cretaceous 7 | *Epoch: | Senonian |
Key time interval: | Late/Upper Campanian | ||
Age range of interval: | 83.50000 - 70.60000 m.y. ago | ||
* legacy (obsolete) database fields |
Stratigraphy
Formation: | El Gallo | ||||
Stratigraphic resolution: | formation | ||||
Stratigraphy comments: said to be Campanian |
Lithology and environment
Primary lithology: | not reported |
Environment: | terrestrial indet. |
Taphonomy
Modes of preservation: | body |
Size of fossils: | macrofossils,mesofossils |
Associated major elements: | some |
Collection methods and comments
Collection methods: | bulk,selective quarrying,surface (float),surface (in situ),sieve,field collection | ||
Reason for describing collection: | taxonomic analysis | ||
Museum repositories: | LACM | ||
Collectors: | H. Garbani, M. Greenwald | Collection dates: | 1970, 1973 |
Collection method comments: collections were eventually moved from the LACM to the IGM (Nydam 1999) | |||
Taxonomic list comments:Ferrusquia 1978 claims there is a "radiometric" date of 73 Ma, which if true places close to the Campanian - Maastrichtian boundary. Said to be Campanian based on ammonites. Date is K-Ar reported in ref 30749 as 73 ± 2 Ma. |
Metadata
Also known as: | LACM 3302, 3310, 7172 | ||
Database number: | 14456 | ||
Authorizer: | J. Alroy, P. Mannion, M. Carrano | Enterer: | J. Alroy, J. Tennant, M. Carrano |
Modifier: | M. Carrano | Research group: | vertebrate |
Created: | 1994-04-30 00:00:00 | Last modified: | 2022-07-01 11:49:51 |
Access level: | the public | Released: | 1994-04-30 00:00:00 |
Creative Commons license: | CC BY |
Reference information
Primary reference:
30749. | ETE | W. J. Morris. 1973. Mesozoic and Tertiary vertebrates in Baja California. National Geographic Society Research Reports (1966) 7:197-209 [M. Carrano/M. Carrano/M. Carrano] |
Secondary references:
19636 | J. Alroy. 2007. Synonymies and reidentifications of North American fossil vertebrates and so forth. [J. Alroy/J. Alroy] | |
1244 | W. A. Clemens. 1980. Gallolestes pachymandibularis (Mammalia: Theria, incertae sedis) from Late Cretaceous deposits in Baja California del Norte, Mexico. PaleoBios 33:1-10 [J. Alroy/J. Alroy/J. Ju] | |
1247 | W. A. Clemens, J. A. Lillegraven, E. H. Lindsay and G. G. Simpson. 1979. Where, when, and what: a survey of known Mesozoic mammal distribution. 7-58 [J. Alroy/J. Alroy/J. Alroy] | |
19691 | ETE | R. Estes and B. Sanchíz. 1982. New discoglossid and palaeobatrachid frogs from the Late Cretaceous of Wyoming and Montana, and a review of other frogs from the Lance and Hell Creek Formations. Journal of Vertebrate Paleontology 2(1):9-20 [M. Carrano/M. Carrano] |
2231 | J. A. Lillegraven. 1976. A new genus of therian mammal from the Late Cretaceous "El Gallo Formation," Baja California, Mexico. Journal of Paleontology 50(3):437-443 [J. Alroy/J. Alroy/M. Carrano] | |
25684 | R. L. Nydam. 1999. Polyglyphanodontinae (Squamata: Teiidae) from the medial and Late Cretaceous: new taxa from Utah, U.S.A. and Baja California del Norte, Mexico. Utah Geological Survey Miscellaneous Publication 99-1:303-317 [J. Alroy/J. Alroy] | |
24301 | ETE | R. L. Nydam, J. G. Eaton, and J. T. Sankey. 2007. New taxa of transversely-toothed lizards (Squamata: Scincomorpha) and new information on the evolutionary history of "teiids". Journal of Paleontology 81(3):538-549 [M. Carrano/M. Carrano/M. Carrano] |
82053 | V. H. Reynoso and J. A. Cruz. 2014. Mesozoic lepidosauromorphs of Mexico: a review and discussion of taxonomic assignments. In H. E. Rivera-Sylva, K. Carpenter, & E. Frey (eds.), Dinosaurs and Other Reptiles from the Mesozoic of Mexico 44-78 [M. Carrano/M. Carrano] | |
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] |