Crater Lake Beds - Scarritt Pocket: Chattian, Argentina

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
unclassified
Plantae indet. Haeckel 1866
Marshall et al. 1986 2 specimens
GGS 158 (Quarry 1), 142 (Quarry 3)
Amphibia - Temnospondyli
Anura indet. (Fischer von Waldheim 1813)
Marshall et al. 1986 20 specimens
AMNH 3401, 3402, 3406, 3408-3414, 3416-3419, 3421, 3423-3426, 3430 (Quarry 1)
Amphibia - Temnospondyli - Leptodactylidae
Neoprocoela edentatus n. gen., n. sp. Schaeffer 1949
Schaeffer 1949 1 specimen
AMNH 3428 (Quarry 1)
Eupsophus sp. Fitzinger 1843
Schaeffer 1949 4 specimens
AMNH 3407, 3415, 3420, 3422 (Quarry 1)
Amphibia - Temnospondyli - Calyptocephalellidae
Calyptocephalella canqueli n. sp. Schaeffer 1949
Schaeffer 1949 3 individuals
AMNH (GGS 149) 3400, 3427, 3429 (Quarry 1)
Mammalia - Sparassodonta
Proborhyaena gigantia
1 specimen
AMNH 29576 (Quarry level)
Mammalia - Rodentia
Rodentia indet. Bowdich 1821
Marshall et al. 1986 1 specimen
AMNH 29602, foot (Quarry 1)
Changquin woodi n. gen., n. sp. Vucetich et al. 2014
Vucetich et al. 2014 1 specimen
MPEF PV 8093, dentary dp4-m2. From a level equivalent to Quarry 4.
Mammalia - Rodentia - Acaremyidae
Platypittamys brachyodon n. gen., n. sp. Wood 1949
Wood 1949 2 individuals
AMNH 29600, 29601 (Quarry 1)
Mammalia - Panameriungulata - Macraucheniidae
Macraucheniidae indet. Ameghino 1889
Marshall et al. 1986 1 specimen
AMNH 114034
Mammalia - Notoungulata
cf. Leontiniidae indet. Ameghino 1894
1 specimen
    = Toxodontia indet. Ameghino 1887
Marshall et al. 1986
AMNH 29607
Mammalia - Notoungulata - Leontiniidae
Scarrittia canquelensis n. gen., n. sp. Simpson 1934
Simpson 1934 33 specimens
AMNH 29571, 29578, 29580, 29583, 29627 (Quarry 1), 29585 (Quarry 2), 29572 (= USNM 13879), 29577, 29581, 29582, 29584 (Quarry 3), 29592, 29593, 29595, 29614-29616, 29629 (Quarry 4), 29594, 29612, 29613, 29626, 29628 (Quarry level), 29567-29569, 29586, 29588, 29598, 29599, 29624, 29625, 29630 (specific locality unknown)
Mammalia - Notoungulata - Notohippidae
Rhynchippus pumilus Ameghino 1897
1 specimen
AMNH 29579 (Quarry 1)
Mammalia - Notoungulata - Interatheriidae
Argyrohyrax proavus Ameghino 1897
Vera et al. 2017
AMNH 29606
Progaleopithecus tournoueri Ameghino 1904
Vera et al. 2017
AMNH 29603; MLP 93-XI-20-5
Mammalia - Cingulata - Chlamyphoridae
? Stenotatus aff. ornatus
Carlini et al. 2009
Mammalia - Cingulata - Dasypodidae
Archaeutatus malaspinensis Ameghino 1902
Carlini et al. 2009
Meteutatus aff. lagenaformis (Ameghino 1897)
Carlini et al. 2009
Sadypus sp. Ameghino 1902
Carlini et al. 2009
Mammalia - Cingulata
Peltephilus sp. Ameghino 1887
2 specimens
AMNH 29623
unclassified
Palaeopeltis cf. inornatus Ameghino 1894
2 specimens
    = Glyptodontidae indet.
Marshall et al. 1986
AMNH 29617
Reptilia - Squamata
Squamata indet. Oppel 1811
Marshall et al. 1986 1 specimen
AMNH 3400 (GGS 150) (Quarry 1)
see common names

Geography
Country:Argentina State/province:Chubut
Coordinates: 44.7° South, 68.4° West (view map)
Paleocoordinates:46.0° South, 60.8° West
Basis of coordinate:stated in text
Geographic resolution:outcrop
Time
Period: Paleogene Epoch: Oligocene
Stage: Chattian 10 m.y. bin: Cenozoic 4
Key time interval: Chattian Mammal zone:  Deseadan (Oligocene, see comments)
Age range of interval: 27.82 - 23.03 m.y. ago
Age estimate: 27.17 ± 0.54 Ma (U/Pb) to 23.4 ± 1 Ma (K-Ar)
Stratigraphy
Formation:Sarmiento
Stratigraphic resolution:group of beds
Stratigraphy comments: This collection record contains multiple levels collectively known as Scarritt Pocket. For the maximum age, we use the oldest dating for this locality (27Ma from Vucetich et al. 2014). For the minimum age, we decide to use the maximum dating of Marshall et al. 1984 (23.4+-1 Ma), because their minimum age (21.0+-1 Ma) now corresponds to a younger SALMA Colhuehuapian based on more recent datings by Dunn et al. 2013. Scarritt Pocket should be restrained in the Deseadan (30–23 Ma based on Dunn et al. 2013).
To avoid further confusion with the definition of the Deseadan in the PBDB (which extends to the Early Miocene), we changed this record to the Chattian, so that Scarritt Pocket is dated to the Late Oligocene alone.
Eocene–Oligocene ‘Tobas del Sarmiento’, Sarmiento Group or Sarmiento Formation (Feruglio 1949; Andreis et al. 1975; Spalletti & Mazzoni 1977, 1979; Reguero & Escribano 1996). Regarding the age of Sarmiento formation, absolute dates are lacking for Cabeza Blanca, but Deseadan levels have been dated in other localities such as Salla, Bolivia (29.4–25.65 Ma), Moquegua, Peru (26.25 Ma), and Chubut, Argentina, Gran Barranca (29.4–24.2 Ma) and Scarritt Pocket (27.17 Ma) (Dunn et al. 2013 and references therein; Vucetich et al. 2014).
Lithology and environment
Primary lithology:volcaniclastic conglomerate
Secondary lithology:volcaniclastic sandstone
Includes fossils?Y
Includes fossils?Y
Environment:crater lake
Taphonomy
Modes of preservation:body,adpression
Size of fossils:macrofossils,mesofossils
Collection methods and comments
Collection methods:field collection
Reason for describing collection:general faunal/floral analysis
Museum repositories:AMNH
Metadata
Also known as:Rinconada de los Lopez
Database number:49783
Authorizer:J. Alroy, P. Mannion, J. Zijlstra Enterer:J. Wertheim, P. Mannion, J. Zijlstra
Modifier:E. Vlachos Research group:vertebrate
Created:2005-04-25 17:06:09 Last modified:2022-10-20 08:54:24
Access level:the public Released:2005-04-25 17:06:09
Creative Commons license:CC BY
Reference information

Primary reference:
13361. R.G. Chaffee. 1952. The Deseadan vertebrate fauna of the Scarritt Pocket, Patagonia. Bulletin of the American Museum of Natural History 98:505-562 [J. Alroy/J. Wertheim/J. Wertheim]

Secondary references:

62632 A. A. Carlini, M. R. Ciancio, J. J. Flynn, G. J. Scillato-Yané, and A. R. Wyss. 2009. The phylogenetic and biostratigraphic significance of new armadillos (Mammalia, Xenarthra, Dasypodidae, Euphractinae) from the Tinguirirican (early Oligocene) of Chile. Journal of Systematic Palaeontology 7(4):489-503 [P. Mannion/P. Mannion]
13081 L. G. Marshall, R. L. Cifelli, R. E. Drake and G. H. Curtis. 1986. Vertebrate paleontology, geology, and geochronology of the Tapera de López and Scarritt Pocket, Chubut Province, Argentina. Journal of Paleontology 60(4):920-951 [D. Croft/D. Croft/D. Croft]
13362 B. Schaeffer. 1949. Anurans from the early Tertiary of Patagonia. Bulletin of the American Museum of Natural History 93(2):44-68 [J. Alroy/J. Wertheim/J. Alroy]
62527 G. G. Simpson. 1934. A new notoungulate from the early Tertiary of Patagonia. American Museum Novitates 735:1-3 [P. Mannion/P. Mannion]
62562 B. Vera, E. Cerdeño, and M. Reguero. 2017. The Interatheriinae from the Late Oligocene of Mendoza (Argentina), with comments on some Deseadan Interatheriidae. Historical Biology 29(5):607-626 [P. Mannion/P. Mannion/P. Mannion]
58125 M. G. Vucetich, M. E. Pérez, M. R. Ciancio, A. A. Carlini, R. H. Madden and M. J. Kohn. 2014. A new acaremyid rodent (Caviomorpha, Octodontoidea) from Scarritt Pocket, Deseadan (late Oligocene) of Patagonia (Argentina). Journal of Vertebrate Paleontology 34(3):689-698 [J. Zijlstra/J. Zijlstra/P. Mannion]
58123 A. E. Wood. 1949. A new Oligocene rodent genus from Patagonia. American Museum Novitates 1435:1-54 [J. Zijlstra/J. Zijlstra/P. Mannion]
58091 J. S. Zijlstra. 2016. Zijlstra's opinions. [J. Zijlstra/J. Zijlstra]