Barrancas del Río Santa Cruz (Miocene of Argentina)

Also known as Río Santa Cruz

Where: Santa Cruz, Argentina (50.1° S, 70.4° W: paleocoordinates 50.7° S, 64.8° W)

• coordinate based on political unit

• basin-level geographic resolution

When: Santa Cruz Formation, Santacrucian (17.5 - 16.3 Ma)

• formation-level stratigraphic resolution

Environment/lithology: terrestrial; lithology not reported

Size class: mesofossils

Collected by C. Ameghino

Primary reference: S. F. Vizcaíno, R. F. Kay, and M. S. Bargo. 2012. Background for a paleoecological study of the Santa Cruz Formation (late Early Miocene) on the Atlantic Coast of Patagonia. In S. F. Vizcaí­no, R. F. Kay, M. S. Bargo (eds.), Early Miocene Paleobiology in Patagonia: High-Latitude Paleocommunities of the Santa Cruz Formation 1-22 [J. Zijlstra/J. Zijlstra/J. Zijlstra]more details

Purpose of describing collection: paleoecologic analysis

PaleoDB collection 176593: authorized by Jelle Zijlstra, entered by Jelle Zijlstra on 17.02.2016, edited by Grace Varnham

Creative Commons license: CC BY (attribution)

Taxonomic list

Mammalia
 Notoungulata - Toxodontidae
"Protoxodon marmoratus n. sp." = Nesodon marmoratus3
"Protoxodon marmoratus n. sp." = Nesodon marmoratus3 Ameghino 1887 notoungulate
MLP 12-250, mandible
 Rodentia - Eocardiidae
Phanomys mixtus n. gen. n. sp.7, Phanomys vetulus n. sp.7
Phanomys mixtus n. gen. n. sp.7 Ameghino 1887 caviomorph
MACN A 11302, maxilla fragment, "lectotype"; MACN A 2022, isolated cheek teeth, "neosyntype"
Phanomys vetulus n. sp.7 Ameghino 1891 caviomorph
MACN A 2024
 Rodentia - Acaremyidae
Pseudoacaremys kramarzi2 Arnal and Vucetich 2015 caviomorph
MLP 15-197a, maxilla P4-M1
Acaremys murinus2 Ameghino 1887 caviomorph
MACN A 249, 266, MLP 15-410
Acaremys messor n. sp.2 Ameghino 1889 caviomorph
MACN A 4106, mandible dp4-m3, holotype
Acaremys tricarinatus2 Ameghino 1894 caviomorph
MLP 15-24
 Rodentia -
Sciamys principalis1 Ameghino 1887 caviomorph
MLP 63-XII-19-127, mandible
 Cingulata - Peltephilidae
Peltephilus pumilus9 Ameghino 1887 edentate
MACN-A 866–870, osteoderms
Peltephilus strepens9 Ameghino 1887 edentate
MACN-A 771, osteoderms
 Xenarthra -
"Stegotherium tessellatum" = Stegotherium tesselatum9
"Stegotherium tessellatum" = Stegotherium tesselatum9 Ameghino 1887 edentate
MACN-A 781–785, osteoderms
 Sparassodonta -
"Cladosictis patagonica n. gen. n. sp." = Cladosictis patagonica5, "Agustylus cynoides n. sp." = Cladosictis patagonica5, Acyon tricuspidatus8, "Sipalocyon gracilis" = Sipalocyon gracilis5, "Hathliacynus lynchi n. sp." = Sipalocyon gracilis5, Lycopsis torresi n. gen. n. sp.4
"Cladosictis patagonica n. gen. n. sp." = Cladosictis patagonica5 Ameghino 1887 metatherian
MLP 11-103, left maxillary fragment with M3-4
"Agustylus cynoides n. sp." = Cladosictis patagonica5 Ameghino 1887 metatherian
MLP 11-78, dentary p2
Acyon tricuspidatus8 Ameghino 1887 metatherian
"Sipalocyon gracilis" = Sipalocyon gracilis5 Ameghino 1887 metatherian
MLP 11-25, dentary p3, m2-4
"Hathliacynus lynchi n. sp." = Sipalocyon gracilis5 Ameghino 1887 metatherian
MLP 11-7, dentary m1-4
Lycopsis torresi n. gen. n. sp.4 Cabrera 1927 metatherian
MLP 11-113, partial skull, holotype
 Sparassodonta - Borhyaenidae
Acrocyon sectorius8 Ameghino 1887 metatherian
MLP 11-70
Borhyaena tuberata8 Ameghino 1887 metatherian
 Microbiotheria - Microbiotheriidae
Microbiotherium tehuelchum6 Ameghino 1887 marsupial
Original type series, now lost
Microbiotherium patagonicum n. gen. n. sp.6 Ameghino 1887 marsupial
MLP 11-30, right dentary m1-4