Mustersan of Gran Barranca (Eocene of Argentina)

Where: Chubut, Argentina (45.7° S, 68.7° W: paleocoordinates 48.1° S, 58.8° W)

• coordinate based on nearby landmark

• local area-level geographic resolution

When: Mustersan mammal zone, Mustersan (48.0 - 42.0 Ma)

• Mustersan SALMA, Late Eocene (Woodburne et al. 2014).

• bed-level stratigraphic resolution

Environment/lithology: terrestrial; lithology not reported

Size classes: macrofossils, mesofossils

Collected by Carlos Ameghino in c. 1900

Primary reference: G. G. Simpson. 1948. The beginning of the age of mammals in South America. Part I. Bulletin of the American Museum of Natural History 91:1-232 [D. Croft/D. Croft/R. Butler]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 176287: authorized by Jelle Zijlstra, entered by Jelle Zijlstra on 06.02.2016

Creative Commons license: CC BY (attribution)

Taxonomic list

Mammalia
 Theriamorpha - Pyrotheriidae
Promoeritherium australe n. gen. n. sp.
Promoeritherium australe n. gen. n. sp. Ameghino 1906 placental
MACN 10903, tooth
 Notoungulata -
Carolodarwinia pyramidentata n. gen. n. sp. Ameghino 1901 notoungulate
MACN 10900, upper premolar
 Notoungulata - Isotemnidae
Distylophorus alouatinus Roth 1902 notoungulate
AMNH 29472, dentary p4-m3
 Notoungulata -
Periphragnis sp. Roth 1899 notoungulate
Lower jaws: AMNH 29423, AMNH 29404, CNHM P13317, CNHM P13531, CNHM P13300, CNHM P13303
Periphragnis circunflexus Ameghino 1901 notoungulate
MACN 10896, right p4-m1, lectotype; MACN 10894, numerous isolated teeth
 Panameriungulata - Proterotheriidae
Polyacrodon ligatus Roth 1899 placental
AMNH 29481, left upper molar