Bryn Gwyn: Burdigalian, Argentina

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Lingulata - Discinida - Disciniidae
Pérez et al. 2023 1 specimen
CNP-PIIc 594, dorsal valve
Reptilia - Sphenisciformes
Cozzuol et al. 1989
Reptilia - Spheniscidae
Cozzuol et al. 1989
Reptilia
Cozzuol et al. 1989
Cozzuol et al. 1989
Reptilia - Anseriformes
Cozzuol et al. 1989
Reptilia - Testudines - Dermochelyidae
Dermochelyidae indet. Lydekker 1889
de la Fuente and Vucetich 1998
MPEF-PV 565, shell fragments
Mammalia - Cetacea
Lydekker 1894
It is not clear which locality this specimen comes from.
Viglino et al. 2018 1 specimen
MPEF-PV 517
Mammalia - Cetacea - Squalodontidae
Cozzuol et al. 1989
Mammalia - Cetacea
Lambert et al. 2021
Mammalia - Cetacea - Physeteridae
Lydekker 1894
It is not clear which locality this specimen comes from.
Mammalia - Cetacea - Eurhinodelphinidae
Cozzuol et al. 1989
Mammalia - Cetacea - Kentriodontidae
Cozzuol 1986
Mammalia - Cetacea
Gaetán et al. 2025 6 specimens
see common names

Geography
Country:Argentina State/province:Chubut
Coordinates: 43.3° South, 65.4° West (view map)
Paleocoordinates:42.8° South, 62.4° West (Wright 2013)
Basis of coordinate:estimated from map
Time
Period: Neogene Epoch: Miocene
Stage: Burdigalian 10 m.y. bin: Cenozoic 5
Key time interval: Burdigalian
Age range of interval: 20.45 - 15.98 m.y. ago
Stratigraphy
Formation:Gaiman
Stratigraphic resolution:formation
Stratigraphy comments: lower part of the Gaiman Formation (Marx & Fordyce, 2015)
Lithology and environment
Primary lithology:tuffaceous,gray siltstone
Secondary lithology:tuffaceous,gray sandstone
Includes fossils?Y
Lithology description: gray tuffaceous siltstones and sandstones
Environment:marine indet.
Taphonomy
Modes of preservation:body,replaced with phosphate
Size of fossils:macrofossils
Preservation of anatomical detail:good
Disassociated minor elements:all
Collection methods and comments
Collection methods:surface (in situ)
Reason for describing collection:taxonomic analysis
Taxonomic list comments:Taxa listed by Lyddeker 1894 were assigned to this collection, even though he only lists the location as "Chubut"
Metadata
Also known as:Loma Blanca
Database number:45886
Authorizer:M. Uhen, E. Vlachos Enterer:M. Uhen, F. Aspromonte, E. Vlachos
Modifier:M. Uhen
Created:2004-12-11 14:09:04 Last modified:2025-02-24 15:22:50
Access level:the public Released:2004-12-11 14:09:04
Creative Commons license:CC0
Reference information

Primary reference:
12217. A. L. Cione and M. A. Cozzuol. 1990. Reidentification of Portheus patagonicus Ameghino, 1901, a supposed fish from the Middle Tertiary of Patagonia as a delphinoid cetacean. Journal of Paleontology 64(3):451-453 [M. Uhen/M. Uhen/J. Alroy]

Secondary references:

15238 M. Cozzuol. 1986. Primer registro de la familia Kentriodontidae (delphinoidea: Cetacea) para el Oligoceno Tarido-Mioceno temprano de Patagonia. Boletin Informativo Associacion Paleontologica Argentina 15:14-14 [M. Uhen/M. Uhen]
15235 M. Cozzuol, G. Humbert Lan, P. Puerta, M. A. Ferrero, and R. Taylor. 1989. Hallazgos recientes de vertebrados marinos en el area de Puerto Madry Y Valle Inferior del Rio Chubut, Chubut, Argentina. Ameghiniana 26(3-4):242-242 [M. Uhen/M. Uhen]
64145 M. S. de la Fuente and M. G. Vucetich. 1998. Nuevos materiales de tortugas cryptodiras miocenas del Valle de Chubut, Argentina. Ameghiniana 35(2):211-215 [E. Vlachos/E. Vlachos]
91089 C. M. Gaetán, M. R. Buono, Y. Tanaka, N. D. Farroni, and V. N. Milano. 2025. Echoes from the Miocene: tracing the anatomy and phylogeny of Prosqualodon australis (Cetacea: Odontoceti). Journal of Systematic Palaeontology 23(1):2455753 [M. Uhen/M. Uhen]
73186 O. Lambert, A. Collareta, A. Benites-Palomino, C. Di Celma, C. Muizon, M. Urbina, and G. Bianucci. 2021. A new small, mesorostrine inioid (Cetacea, Odontoceti, Delphinida) from four upper Miocene localities in the Pisco Basin, Peru. Papers in Palaeontology 7(2):1043-1064 [M. Uhen/M. Uhen/M. Uhen]
12338 R. Lydekker. 1894. Cetacean skulls from Patagonia. Anales del Museo de la Plata II:1-13 [M. Uhen/M. Uhen/M. Uhen]
12337 F. P. Moreno. 1892. Lijeros apuntes sobre dos generos de cetaceos fosiles de la Republica Argentina. Revista del Museo de La Plata 3:393-400 [M. Uhen/M. Uhen/M. Uhen]
88214 D. E. Pérez, N. D. Farroni, A. A. Mosquera and J. I. Cuitiño. 2023. First discinid brachiopods (Brachiopoda: Lingulida) from the Cenozoic of Patagonia (Gaiman Formation, Lower Miocene, Argentina). Ameghiniana 60(3):203-215 [E. Vlachos/F. Aspromonte]
61186 M. Viglino, M. R. Buono, C. S. Gutstein, M. A. Cozzuol, and J. I. Cuitiño. 2018. A new dolphin from the early Miocene of Patagonia, Argentina: Insights into the evolution of Platanistoidea in the Southern Hemisphere. Acta Palaeontologica Polonica 63(2):261-277 [M. Uhen/J. Ju/P. Mannion]
57933 M. G. Vucetich, A. G. Kramarz, and A. M. Candela. 2010. Colhuehuapian rodents from Gran Barranca and other Patagonian localities: the state of the art. In R. H. Madden, A. A. Carlini, M. G. Vucetich, R. F. Kay (eds.), The Paleontology of Gran Barranca: Evolution and Environmental Change through the Middle Cenozoic of Patagonia 206-219 [J. Zijlstra/J. Zijlstra]