Pico Truncado ( of Argentina)

Where: Santa Cruz, Argentina (46.7° S, 68.4° W: paleocoordinates 47.9° S, 60.8° W)

• coordinate estimated from map

• local area-level geographic resolution

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

• Deseadan in age on the basis of mammals. Marshall et al. (1986) suggested the mammalian fauna is older than a basalt dated at 33.6 +/- 0.4 Ma, but this is inconsistent with currently accepted dates for the Deseadan SALMA.

• group of beds-level stratigraphic resolution

Environment/lithology: terrestrial; lithology not reported

Size classes: macrofossils, mesofossils

Collected by Marshall Field Expedition in 1924; reposited in the FMNH

Primary reference: L. G. Marshall, R. L. Cifelli, R. E. Drake and G. H. Curtis. 1986. Vertebrate paleontology, geology, and geochronology of the Tapera de López and Scarritt Pocket, Chubut Province, Argentina. Journal of Paleontology 60(4):920-951 [D. Croft/D. Croft/D. Croft]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 176269: authorized by Jelle Zijlstra, entered by Jelle Zijlstra on 05.02.2016, edited by Philip Mannion and Grace Varnham

Creative Commons license: CC BY (attribution)

Taxonomic list

Mammalia
 Notoungulata - Mesotheriidae
Trachytherus spegazzinianus2 Ameghino 1889 notoungulate
FMNH P13381, partial skull with right M1-3 and left P3-M3
 Notoungulata - Archaeohyracidae
Archaeohyrax patagonicus8 Ameghino 1897 notoungulate
 Notoungulata - Notohippidae
"Rhynchippinae indet." = Notohippidae
"Rhynchippinae indet." = Notohippidae Ameghino 1894 notoungulate
 Notoungulata - Leontiniidae
Elmerriggsia fieldia n. gen. n. sp.9
Elmerriggsia fieldia n. gen. n. sp.9 Shockey et al. 2012 notoungulate
 Notoungulata - Isotemnidae
Isotemnidae indet. Ameghino 1897 notoungulate
AMNH 28676, M?3. Collected by Simpson from the "middle tuff unit".
 Astrapotheria - Astrapotheriidae
Parastrapotherium holmbergi5 Ameghino 1894 placental
Liarthrus copei5 Ameghino 1894 placental
FMNH specimens (premolars)
 Theriamorpha - Pyrotheridae
Pyrotherium sp. Ameghino 1888 placental
Pyrotherium romeroi6 placental
FMNH P13515
  - Mylodontidae
Octodontotherium sp. Ameghino 1894 edentate
 Cingulata - Dasypodidae
Meteutatus aff. lagenaformis4 Ameghino 1897 armadillo
"Sadypus sp." = Meteutatus4 Ameghino 1902 armadillo
 Rodentia - Cephalomyidae
Cephalomyidae indet.3 Ameghino 1897 caviomorph
FMNH P15062
 Sparassodonta - Borhyaenidae
"Pharsophorus antiquus" = Australohyaena antiqua7
"Pharsophorus antiquus" = Australohyaena antiqua7 Ameghino 1894 metatherian
FMNH P 13800, M3
Aves
 Gruiformes - Phorusrhacidae
Andrewsornis abbotti1 Patterson 1941 terror bird