Bryn Gwyn (Miocene of Argentina)

Also known as Loma Blanca

Where: Chubut, Argentina (43.3° S, 65.4° W: paleocoordinates 43.9° S, 59.9° W)

• coordinate estimated from map

When: Gaiman Formation, Burdigalian (20.4 - 16.0 Ma)

• lower part of the Gaiman Formation (Marx & Fordyce, 2015)

• formation-level stratigraphic resolution

Environment/lithology: marine; tuffaceous, gray siltstone and tuffaceous, gray sandstone

• gray tuffaceous siltstones and sandstones

Size class: macrofossils

Preservation: replaced with phosphate

Collection methods: surface (in situ)

Primary reference: 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]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 45886: authorized by Mark Uhen, entered by Mark Uhen on 11.12.2004, edited by Evangelos Vlachos

Creative Commons license: CC BY (attribution)

Taxonomic list

• Taxa listed by Lyddeker 1894 were assigned to this collection, even though he only lists the location as "Chubut"
Mammalia
 Cetacea - Squalodontidae
Squalodontidae indet.2 Brandt 1873 toothed whale
 Cetacea -
Argyrocetus patagonicus n. gen. n. sp.5 Lydekker 1894 toothed whale
It is not clear which locality this specimen comes from.
Physeteroidea indet.4 Gray 1868 toothed whale
 Cetacea - Physeteridae
"Physodon patagonicus n. sp." = Idiorophus patagonicus5
"Physodon patagonicus n. sp." = Idiorophus patagonicus5 Lydekker 1894 sperm whale
It is not clear which locality this specimen comes from.
 Cetacea - Eurhinodelphinidae
"Eurhinodelphidae indet." = Eurhinodelphinidae2
"Eurhinodelphidae indet." = Eurhinodelphinidae2 Abel 1901 toothed whale
 Cetacea - Kentriodontidae
Kentriodontidae indet.1 Slijper 1936 toothed whale
cf. Kentriodon sp. Kellogg 1927 toothed whale
 Cetacea -
Aondelphis talen n. gen. n. sp.6
Aondelphis talen n. gen. n. sp.6 Viglino et al. 2018 toothed whale
MPEF-PV 517
Reptilia
 Testudines - Dermochelyidae
Dermochelyidae indet.3 Lydekker 1889 leatherback
MPEF-PV 565, shell fragments
Aves
 Neornithes -
Anseriformes indet.2 Wagler 1831 waterfowl
 Sphenisciformes - Spheniscidae
Arthrodytes sp.2 Ameghino 1905 penguin
 Sphenisciformes -
Eretiscus tonnii2 Simpson 1981 penguin