Deseadan of Patagonia ( of Argentina)

Where: Chubut, Argentina (45.7° S, 68.7° W: paleocoordinates 46.9° S, 61.2° W)

• coordinate based on political unit

• basin-level geographic resolution

When: Deseadan mammal zone, Sarmiento Formation, Deseadan (29.0 - 21.0 Ma)

• Unit 3 of the Upper Puesto Almendra Member at Gran Barranca, Chubut.

•Deseadan SALMA, Late Oligocene (Woodburne et al. 2014).

• bed-level stratigraphic resolution

Environment/lithology: terrestrial; lithology not reported

Size classes: macrofossils, mesofossils

Collected by C. Ameghino

Primary reference: F. Ameghino. 1897. Mammiféres crétacés de l’Argentine (Deuxième contribution à la connaissance de la fauna mammalogique de couches à Pyrotherium) [Cretaceous mammals of Argentina (second contribution to the knowledge of the mammalian fauna of the Pyrotherium Beds)]. Boletin Instituto Geografico Argentino 18(4–9):406-521 [M. Uhen/M. Uhen/M. Carrano]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 176647: authorized by Jelle Zijlstra, entered by Jelle Zijlstra on 21.02.2016

Creative Commons license: CC BY (attribution)

Taxonomic list

 Notoungulata - Mesotheriidae
Trachytherus spegazzinianus n. gen. n. sp.1 Ameghino 1889 notoungulate
MACN A235, right maxillary and premaxillary with broken I1, P2-M2, broken M3, holotype; MLP 52-XI-2-1, left maxillary and premaxillary with I1, P2-M2, probably originally part of the same specimen. The holotype was said by Ameghino (1889) to have come from the province of Neuquén, but the specimen originally bore a label with the locality name Santa Cruz, and Reguero (1999) says it came from central Chubut. See Billet et al. (2008:173, 175)
 Notoungulata - Archaeohyracidae
Archaeohyrax patagonicus n. gen. n. sp.
Archaeohyrax patagonicus n. gen. n. sp. Ameghino 1897 notoungulate
MACN A52-617, cranium and mandible, holotype; 624, dentary p3-m3; 627, ?M1; 619, M1 and M2. These specimens may come from Cabeza Blanca.
 Notoungulata - Hegetotheriidae
Prohegetotherium sculptum n. gen. n. sp. Ameghino 1897 notoungulate
MACN A52-443, maxilla P1-3, lectotype, and A52-444, maxilla P3-M2, paralectotype. Labelled as being from Mazarredo, Santa Cruz, but suggested to be from Cabeza Blanca.
 Panameriungulata -
Proadiantus gibbus n. sp.2 Ameghino 1901 placental
MACN A52-216, incisor or canine and partial left mandibular symphysis
 Sparassodonta - Borhyaenidae
"Pharsophorus antiquus n. sp." = Australohyaena antiqua3, Pharsophorus lacerans4
"Pharsophorus antiquus n. sp." = Australohyaena antiqua3 Ameghino 1894 metatherian
MACN A 52-532, right upper canine, holotype. Patterson & Marshall (1978) stated that it was from La Flecha, and the MACN catalogue suggests it is from Punta Nava.
Pharsophorus lacerans4 Ameghino 1897 metatherian
MACN 11653, dentary with p3, m2-4
 Paucituberculata - Caenolestidae
"Halmarhiphus guaraniticus n. sp." = Pseudhalmarhiphus guaraniticus4
"Halmarhiphus guaraniticus n. sp." = Pseudhalmarhiphus guaraniticus4 Ameghino 1899 marsupial
Dentary with m1-2, type, now lost