Campo Barranca (Miocene of Argentina)

Where: Santa Cruz, Argentina (51.0° S, 69.2° W: paleocoordinates 51.6° S, 63.5° W)

• coordinate stated in text

• local area-level geographic resolution

When: Estancia La Costa Member (Santa Cruz Formation), Santacrucian (17.5 - 16.3 Ma)

• Dates from three levels in the lower one-third of the Santa Cruz fossiliferous beds at Monte Observación, rangebetween 16.42 Ma and 16.18 Ma and between 16.56 Ma and 16.28 Ma at Monte León. The dates are not wholly concordant but permit the assignment of the bulk of the coastal Santacrucian faunas to the late–early Miocene

•Kay et al 2008: This list will expand as previously collected specimens are prepared and with future collecting. At the moment, this faunal listfits within the Santacrucian SALMA (Marshall, 1976; Marshall et al., 1983).

• formation-level stratigraphic resolution

Environment/lithology: terrestrial; green, silty, sandy claystone

• Greenish silty clay. In places, the clay is finely laminated — some layers have ripple marks and others are carbon-rich. Elsewhere, it is bioturbated, preserving calcified root casts, and has poorly defined bedding.

•The Campo Barranca fossil level is composed of a silty

•clay, greenish in color. In places, the clay is finely lami- nated—some layers have ripple marks and others are car- bon-rich. Elsewhere, it is bioturbated, preserving calcified root casts, and has poorly defined bedding.

Size class: macrofossils

Collected in 2003-2009

Primary reference: R. F. Kay, S.F. Vizcaino, M. S. Bargo, J. M. G. Perry, F. J. Prevosti and J. C. Fernicola. 2008. Two new fossil vertebrate localities in the Santa Cruz Formation (late early – early middle Miocene, Argentina), ~ 51° South latitude. Journal of South American Earth Sciences 25:187-195 [P. Mannion/M. Kouvari]more details

Purpose of describing collection: paleoecologic analysis

PaleoDB collection 142529: authorized by Carlos Jaramillo, entered by Juan Carrillo on 13.04.2013, edited by Jelle Zijlstra and Miranta Kouvari

Creative Commons license: CC BY (attribution)

Taxonomic list

 Rodentia -
Spaniomys modestus4 Ameghino 1887 caviomorph
Stichomys sp.4 Ameghino 1887 caviomorph
 Rodentia - Neoepiblemidae
Perimys sp.4 Ameghino 1887 caviomorph
 Rodentia -
Neoreomys sp. Ameghino 1887 caviomorph
Neoreomys australis4 Ameghino 1887 caviomorph
MPM-PV 4345, incomplete skull (ref 58225)
 Rodentia - Eocardiidae
Phanomys mixtus4 Ameghino 1887 caviomorph
MPM-PV 4375 (ref 58197)
 Rodentia -
Eocardia sp.4 Ameghino 1887 caviomorph
Eocardia excavata4 Ameghino 1891 caviomorph
Eocardia montana4 Ameghino 1887 caviomorph
 Panameriungulata - Proterotheriidae
Diadiaphorus majusculus4 Ameghino 1887 placental
MPM-PV 3397, cranium and mandible (ref 58224)
 Megatherioidea - Megalonychidae
Hapalops "sp. 1"4 Ameghino 1887 edentate
Hapalops "sp. 2"4 Ameghino 1887 edentate
cf. Hapalops sp. Ameghino 1887 edentate
Eucholoeops sp. Amegino 1887 edentate
Eucholoeops sp.1 Amegino 1887 edentate
Eucholoeops ingens1 Ameghino 1887 edentate
MPM-PV 3452, skull. See also ref 71644
 Cingulata - Chlamyphoridae
Proeutatus "sp. 1"4 Ameghino 1891 edentate
Proeutatus "sp. 2"4 Ameghino 1891 edentate
Proeutatus sp. Ameghino 1891 edentate
"Proeutatus oenophorus" = Proeutatus oenophorum5 Ameghino 1887 edentate
MPM-PV 3438, osteoderms; 3439, partial skull; 3440, carapace fragment; 3442, osteoderms
Stenotatus patagonicus Ameghino 1887 edentate
Stenotatus patagonicus?
Stenotatus cf. patagonicus5 Ameghino 1887 edentate
Prozaedyus sp. Ameghino 1891 edentate
Prozaedyus proximus5 Ameghino 1887 edentate
 Notoungulata - Toxodontidae
Adinotherium sp.4, "Adinotherium ovinum" = Adinotherium ovinum, "Adinotherium ferum" = Adinotherium ovinum2, Nesodon sp.4
Adinotherium sp.4 Ameghino 1887 notoungulate
"Adinotherium ovinum" = Adinotherium ovinum Owen 1846 notoungulate
"Adinotherium ferum" = Adinotherium ovinum2 Owen 1846 notoungulate
MPM-PV 3666, cranium, mandible; 3667, cranium, mandible
Nesodon sp.4 Owen 1846 notoungulate
 Notoungulata - Interatheriidae
Protypotherium sp. Ameghino 1882 notoungulate
"Protypotherium cf. attenuatum" = Protypotherium praerutilum Ameghino 1887 notoungulate
Protypotherium australe4 Moreno 1882 notoungulate
MPM-PV 3531, mandible (ref 58224)
 Astrapotheria - Astrapotheriidae
Astrapotherium magnum4 Owen 1853 placental
 Paucituberculata - Palaeothentidae
Palaeothentes minutus4 Ameghino 1887 marsupial
 Sparassodonta -
Cladosictis patagonica4 Ameghino 1887 metatherian
MPM-PV 4333 (ref 58202)
 Sparassodonta - Borhyaenidae
Borhyaena tuberata3 Ameghino 1887 metatherian
MPM-PV 3554
 Gruiformes - Phorusrhacidae
Phorusrhacidae indet. Ameghino 1889 terror bird
“Phorusrhacidae” indet.
Phorusrhacos longissimus4 Ameghino 1887 terror bird
MPM-PV 4241, mandible, left femur, tibiotarsus, and both fibulae (ref 58178)