Bajo de la Palangana (lower levels): Ypresian, Argentina
collected by Feruglio

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Mammalia
3 specimens
AMNH 27894, 27889, 27887
Mammalia - Xenungulata - Carodniidae
1 specimen
AMNH 27886 (cast of holotype)
1 specimen
AMNH 27897 (cast of holotype)
Mammalia - Polydolopidae
Chornogubsky 2020
MLP 79-I-17-3
see common names

Geography
Country:Argentina State/province:Chubut
Coordinates: 45.4° South, 67.2° West (view map)
Paleocoordinates:47.1° South, 57.4° West (Wright 2013)
Basis of coordinate:estimated from map
Geographic resolution:outcrop
Time
Period: Paleogene Epoch: Eocene
Stage: Ypresian 10 m.y. bin: Cenozoic 2
*Period:Early/Lower Tertiary *Epoch:Late/Upper Paleocene
*Local age/stage:Riochican
Key time interval: Ypresian Mammal zone:  Carodnian
Age range of interval: 56 - 48.07 m.y. ago
* legacy (obsolete) database fields
Stratigraphy
Geological group:Río Chico Formation:Las Flores Member:lower
Stratigraphic resolution:group of beds
Stratigraphy comments: 19 to 20 meters above the "Banco Negro Superior". All specimens occur within a six metre stratigraphic span. Informal Carodnian zone, between Peligran and Itaboraian SALMA. Approximately correlative to the Middle Paleocene/Selandian according to Woodburne et al. (2014). Previously assigned to the Peñas Coloradas Formation, but Vera and Krause (2020) argued that this layer represents the lower Las Flores Formation instead
Lithology and environment
Primary lithology:red sandstone
Includes fossils?Y
Lithology description: reddish to pinkish, cross-bedded sandstones, with intercalated clay lenses
Environment:terrestrial indet.
Taphonomy
Modes of preservation:body
Size of fossils:macrofossils,mesofossils
Disassociated minor elements:some
Fragmentation:extreme
Collection methods and comments
Collection methods:field collection
Reason for describing collection:taxonomic analysis
Museum repositories:AMNH
Collectors:Feruglio
Collection method comments: Original specimens are in the Feruglio Collection. Casts in AMNH
Metadata
Also known as:Bajo Palangana; Carodnia faunal zone
Database number:13780
Authorizer:J. Alroy, P. Mannion Enterer:J. Wertheim, M. Kouvari
Modifier:P. Mannion Research group:vertebrate
Created:2002-04-25 16:43:34 Last modified:2025-02-22 15:12:02
Access level:the public Released:2002-04-25 16:43:34
Creative Commons license:CC0
Reference information

Primary reference:
6147.5% 49100G. G. Simpson. 1935. Descriptions of the oldest known South American mammals, from the Rio Chico Formation. American Museum Novitates 793:1-25 [J. Alroy/J. Wertheim/J. Wertheim]

Secondary references:

74919 L. Chornogubsky. 2020. Interrelationships of Polydolopidae (Mammalia: Marsupialia) from South America and Antarctica. Zoological Journal of the Linnean Society 1-42 [P. Mannion/M. Kouvari]
26605 J. N. Gelfo, G. M. López, and M. Bond. 2008. A new Xenungulata (Mammalia) from the Paleocene of Patagonia Argentina. Journal of Paleontology 82(2):329-335 [D. Croft/D. Croft]
89011 J. N. Gelfo, G. M. López, and M. Bond. 2024. New insights on the anatomy, paleobiology, and biostratigraphy of Xenungulata (Mammalia) from the Paleogene of South America. Palaeontologia Electronica 27(2):a30 [P. Mannion/P. Mannion]
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]
73871 B. Vera, M. Fornasiero, and L. Del Favero. 2020. New data on Carodnia feruglioi (Carodniidae, Xenungulata) from the early Eocene of Patagonia (Argentina). Ameghiniana [P. Mannion/P. Mannion]
73732 B. Vera and J. M. Krause. 2020. New insights into the Kibenikhoria and Ernestokokenia faunas and the implications for the early Eocene of Patagonia, Argentina. Journal of Vertebrate Paleontology e1772801:1-21 [P. Mannion/P. Mannion]
57561 M. O. Woodburne, F. J. Goin, M. Bond, A. A. Carlini, J. N. Gelfo, G. M. López, A. Iglesias and A. N. Zimicz. 2014. Paleogene Land Mammal Faunas of South America; a Response to Global Climatic Changes and Indigenous Floral Diversity. Journal of Mammalian Evolution 21:1-73 [R. Butler/R. Butler]