Pan de Azucar, Gaiman: Early/Lower Eocene - Middle Eocene, Argentina

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Reptilia - Testudines - Chelidae
Chelidae indet. Gray 1825
de Broin and de la Fuente 1993
MLP
Mammalia - Notoungulata - Isotemnidae
Lelfunia haugi n. gen., n. sp. Roth 1902
Roth 1904 1 specimen
recombined as Isotemnus haugi
MLP 12-2206, left M2 (see also ref 10312)
Mammalia - Notoungulata - Notopithecidae
Notopithecidae indet. Ameghino 1897
Simpson 1935
Mammalia - Notoungulata - Henricosborniidae
Monolophodon minutus n. gen., n. sp. Roth 1904
Roth 1904 1 specimen
recombined as Henricosbornia minuta
MLP 12-2174, left M3 (see also ref 10312)
Mammalia - Polydolopidae
Polydolops rothi n. sp. Simpson 1936
1 specimen
recombined as Pliodolops rothi
MLP 11-122, a partial left mandibular ramus with alveoli of P2 and P:!-M2 complete
see common names

Geography
Country:Argentina State/province:Chubut
Coordinates: 43.3° South, 65.5° West (view map)
Paleocoordinates:45.8° South, 55.5° West
Basis of coordinate:based on nearby landmark
Geographic resolution:outcrop
Time
Period:Paleogene Epoch:Eocene
Key time interval:Early/Lower Eocene - Middle Eocene Mammal zone: Sapoan
Age range of interval:56.00000 - 37.71000 m.y. ago
Stratigraphy
Geological group:Río Chico
Stratigraphic resolution:group of beds
Stratigraphy comments: Stratigraphic correlations of this locality are unclear. Tejedor et al. (2009: Am. Museum Novitates 3638) note that it shares taxa with the "Sapoan" SALMA/Paso del Sapo local fauna, but also taxa from the Itaboraian of Canadon Hondo. This suggests an Early to Middle Eocene date.
Lithology and environment
Primary lithology: sandstone
Environment:terrestrial indet.
Taphonomy
Modes of preservation:body
Size of fossils:macrofossils,mesofossils
Collection methods and comments
Collection methods:survey of museum collection
Reason for describing collection:taxonomic analysis
Taxonomic list comments:Simpson (1935) writes that "there are several interesting specimens collected by A.F. Bordas, in the Museo Argentino, not yet described." These may still be unpublished.
Metadata
Database number:175735
Authorizer:R. Butler, E. Vlachos Enterer:R. Butler, E. Vlachos
Modifier:M. Carrano Research group:vertebrate
Created:2016-01-07 16:31:47 Last modified:2022-10-07 16:18:12
Access level:the public Released:2016-01-07 16:31:47
Creative Commons license:CC BY
Reference information

Primary reference:
57557. L. G. Marshall. 1982. Systematics of the extinct South American marsupial family Polydolopidae. Fieldiana Geology 12:1-109 [R. Butler/R. Butler]

Secondary references:

42415 F. de Broin and M. de la Fuente. 1993. Les tortues fossiles d'Argentine: synthese [The fossil turtles of Argentina: synthesis]. Annales de Paléontologie (Invertebrés-Vertebrés) 79(3):169-232 [R. Benson/R. Benson/M. Carrano]
73279 S. Roth. 1904. Noticias preliminares sobre nuevos mamíferos fósiles del Cretáceo superior y Terciario inferior de la Patagonia. Revista del Museo de la Plata 11:135-158 [P. Mannion/M. Kouvari]
57551 G. G. Simpson. 1935. Occurrence and relationships of the Rio Chico fauna of Patagonia. American Museum Novitates 818:1-21 [R. Butler/R. Butler]
10369 G. G. Simpson. 1948. The beginning of the age of mammals in South America. Part I. Bulletin of the American Museum of Natural History 91:1-232 [D. Croft/D. Croft/R. Butler]
10312 G. G. Simpson. 1967. The beginning of the age of mammals in South America. Part II. Bulletin of the American Museum of Natural History 137:1-260 [D. Croft/D. Croft/K. Pino]