Puesto Almendra, Gran Barranca, Chubut (Oligocene of Argentina)

Also known as APS level, Astraponotéen plus supérieure, Lago Colhué Huapí

Where: Chubut, Argentina (45.5° S, 69.0° W: paleocoordinates 47.3° S, 60.3° W)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Early/Lower Oligocene (33.9 - 28.4 Ma)

• "APS" level is Tinguirirican; also referred to as pre-Deseadan, post-Mustersan

Environment/lithology: terrestrial; lithology not reported

Size classes: macrofossils, mesofossils

Preservation: permineralized

Reposited in the MACN

Primary reference: R. Hitz, M. Reguero, A. R. Wyss and J. J. Flynn. 2000. New interatheriines (Interatheriidae, Notoungulata) from the Paleogene of Central Chile and Southern Argentina. Fieldiana: Geology (New Series) 42:1-26 [D. Croft/D. Croft/D. Croft]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 38611: authorized by Darin Croft, entered by Darin Croft on 26.04.2004, edited by Jelle Zijlstra

Creative Commons license: CC BY (attribution)

Taxonomic list

Mammalia
 Notoungulata -
"? Eomorphippus pascuali" = Rosendo pascuali2, Eomorphippus obscurus2
"? Eomorphippus pascuali" = Rosendo pascuali2 Simpson 1967 notoungulate
AMNH 29405, 29474
Eomorphippus obscurus2 Ameghino 1901 notoungulate
AMNH 29462
 Notoungulata - Isotemnidae
Interhippus deflexus n. gen. n. sp.4
Interhippus deflexus n. gen. n. sp.4 Ameghino 1902 notoungulate
MACN 10916, M1 or M2 (lectotype) and m3
 Notoungulata - Interatheriidae
Santiagorothia chiliensis Hitz et al. 2000 notoungulate
MACN A10908a,b,c
"Eopachyrucos pliciferus" = Eopachyrucos pliciformis Simpson 1967 notoungulate
MACN A55-12, holotype, likely collected from this level but not known for sure
 Notoungulata - Archaeohyracidae
Archaeotypotherium propheticus1 Ameghino 1897 notoungulate
MACN A-10911
 Theriamorpha -
Proplatyarthrus longipes n. gen. n. sp.3
Proplatyarthrus longipes n. gen. n. sp.3 Ameghino 1905 edentate
A left astragalus, now lost. Relocated by Simpson (1967); it is now MACN A55-9
 Cingulata - Dasypodidae
Meteutatus attonsus n. sp.3 Ameghino 1902 armadillo
According to Simpson (1948), type is MACN 10957, six scutes, heavily coated in manganese, and said to be from the Mustersan. This mode of preservation is typical of the Tinguirirican level at Gran Barranca (Carlini et al., 2010). Carlini et al. (2010) could not relocate the type in the MACN collection.