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
Scotiophryne sp. Estes 1969
Estes and Sanchíz 1982
Mammalia - Multituberculata - Neoplagiaulacidae
Mesodma cf. formosa (Marsh 1889)
3 specimens
Mammalia - Multituberculata - Eucosmodontidae
? Stygimys sp. Sloan and Van Valen 1965
1 specimen
"n. sp."
Mammalia - Zhelestidae
Gallolestes pachymandibularis n. gen., n. sp. Lillegraven 1976
Lillegraven 1976 4 specimens
from LACM 3302; also at LACM 3310, LACM 7172: Clemens 1980
Mammalia - Pediomyidae
Pediomys sp. Marsh 1889
Clemens et al. 1979
    = Pediomyidae indet. Simpson 1927
Alroy 2007
Reptilia
Naomichelys sp. Hay 1908
Reynoso 2006
Reptilia - Polyglyphanodontidae
Polyglyphanodon bajaensis n. sp. Nydam 1999
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]
19691ETE 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]
24301ETE 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]