Río Chico frente a Malaspina (Eocene of Argentina)

Where: Chubut, Argentina (45.0° S, 67.2° W: paleocoordinates 47.5° S, 57.2° W)

• coordinate estimated from map

• local area-level geographic resolution

When: Casamayoran zone, Casamayoran (55.8 - 48.0 Ma)

• Casamayoran SALMA, Middle-Late Eocene (Woodburne et al. 2014).

• formation-level stratigraphic resolution

Environment/lithology: terrestrial; lithology not reported

Size class: mesofossils

Collected by C. Ameghino in c. 1900

Primary reference: G. G. Simpson. 1967. The Ameghinos' localities for early Cenozoic mammals in Patagonia. Bulletin of the Museum of Comparative Zoology 136:63-76 [J. Zijlstra/J. Zijlstra]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 176284: authorized by Jelle Zijlstra, entered by Jelle Zijlstra on 05.02.2016

Creative Commons license: CC BY (attribution)

Taxonomic list

Mammalia
 Cingulata - Dasypodidae
"Utaetus argos n. sp." = Utaetus buccatus3
"Utaetus argos n. sp." = Utaetus buccatus3 Ameghino 1902 armadillo
MACN 10445, three scutes. Locality record based on Simpson (1967, ref. 57943).
 Notoungulata -
? Claenodon patagonicus n. sp.2 Ameghino 1904 notoungulate
MACN 10704, astragalus
 Notoungulata - Notostylopidae
cf. Notostylops pendens1 Ameghino 1901 notoungulate
MACN 10526
  -
Protobradys harmonicus n. gen. n. sp.2
Protobradys harmonicus n. gen. n. sp.2 Ameghino 1902 mammal
MACN A10330, left maxilla fragment with alveoli. Thought to be lost by Simpson (1948) but relocated by Simpson (1967).