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

• local area-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, Miranta Kouvari and Kateryn Pino

Creative Commons license: CC BY (attribution)

Taxonomic list

 Sparassodonta - Borhyaenidae
Borhyaena tuberata14 Ameghino 1887 metatherian
Acrocyon sectorius14 Ameghino 1887 metatherian
MLP 11-70
 Sparassodonta -
Lycopsis torresi n. gen. n. sp.9, "Cladosictis patagonica n. gen. n. sp." = Cladosictis patagonica10, "Agustylus cynoides n. sp." = Cladosictis patagonica10, "Sipalocyon gracilis" = Sipalocyon gracilis10, "Hathliacynus lynchi n. sp." = Sipalocyon gracilis10, Acyon tricuspidatus14
Lycopsis torresi n. gen. n. sp.9 Cabrera 1927 metatherian
MLP 11-113, partial skull, holotype
"Cladosictis patagonica n. gen. n. sp." = Cladosictis patagonica10 Ameghino 1887 metatherian
MLP 11-103, left maxillary fragment with M3-4
"Agustylus cynoides n. sp." = Cladosictis patagonica10 Ameghino 1887 metatherian
MLP 11-78, dentary p2
"Sipalocyon gracilis" = Sipalocyon gracilis10 Ameghino 1887 metatherian
MLP 11-25, dentary p3, m2-4
"Hathliacynus lynchi n. sp." = Sipalocyon gracilis10 Ameghino 1887 metatherian
MLP 11-7, dentary m1-4
Acyon tricuspidatus14 Ameghino 1887 metatherian
 Microbiotheria - Microbiotheriidae
Microbiotherium tehuelchum11 Ameghino 1887 marsupial
Original type series, now lost
Microbiotherium patagonicum n. gen. n. sp.11 Ameghino 1887 marsupial
MLP 11-30, right dentary m1-4
 Xenarthra -
Stegotherium simplex7, "Stegotherium tessellatum" = Stegotherium tesselatum15
Stegotherium simplex7 Ameghino 1887 edentate
"Stegotherium tessellatum" = Stegotherium tesselatum15 Ameghino 1887 edentate
MACN-A 781–785, osteoderms
 Cingulata - Peltephilidae
Peltephilus pumilus15 Ameghino 1887 edentate
MACN-A 866–870, osteoderms
Peltephilus strepens15 Ameghino 1887 edentate
MACN-A 771, osteoderms
 Rodentia - Chinchillidae
Pliolagostomus notatus n. sp.16 Ameghino 1887 chinchilid
Holotype: MLP 15-18 and other MLP specimens
Prolagostomus pusillus12 Ameghino 1887 chinchilid
 Rodentia -
Neoreomys australis12 Ameghino 1887 caviomorph
Eocardia excavata12 Ameghino 1891 caviomorph
Eocardia montana12 Ameghino 1887 caviomorph
 Rodentia - Eocardiidae
"Eocardia fissa" = Dicardia fissa12, Schistomys erro12, Phanomys mixtus n. gen. n. sp.13, Phanomys vetulus n. sp.13
"Eocardia fissa" = Dicardia fissa12 Ameghino 1891 caviomorph
Schistomys erro12 Ameghino 1887 caviomorph
Phanomys mixtus n. gen. n. sp.13 Ameghino 1887 caviomorph
MACN A 11302, maxilla fragment, "lectotype"; MACN A 2022, isolated cheek teeth, "neosyntype"
Phanomys vetulus n. sp.13 Ameghino 1891 caviomorph
MACN A 2024
 Rodentia -
Steiromys duplicatus12 Ameghino 1887 caviomorph
Steiromys detentus12 Ameghino 1887 caviomorph
 Rodentia - Dinomyidae
Scleromys angustus12 Ameghino 1887 caviomorph
 Rodentia - Neoepiblemidae
Perimys incavatus12 Ameghino 1902 caviomorph
Perimys onustus12 Ameghino 1887 caviomorph
Perimys erutus12 Ameghino 1887 caviomorph
Perimys zonatus12 Ameghino 1887 caviomorph
 Rodentia -
"Acaremys minutus" = Acarechimys minutus3 Patterson and Pascual 1967 caviomorph
MLP 15-410a (syntype of Acaremys minutus)
Acarechimys minutissimus3 Ameghino 1887 caviomorph
MLP 15-188 (syntype of Acaremys minutissimus) MLP 15-188a MLP 15-398 MLP 15-408 MPM-PV 15098
Acarechimys gracilis3 Ameghino 1891 caviomorph
MPM-PV 17430 MPM-PV 17431 MPM-PV 17432 MPM-PV 17433 MPM-PV 17434 MPM-PV 17439
"Stichomys constans" = Acarechimys constans3 Ameghino 1887 caviomorph
MLP 15-200 (syntype of Stichomys constans) MLP 15-39 (syntype of Stichomys constans)
"Acarechimys constans" = Acarechimys constans3 Ameghino 1887 caviomorph
MLP 15-319
Adelphomys sp.4 Ameghino 1887 caviomorph
MLP 15–183, MLP 15–221, MLP 15–216 (lectotype of A. candidus), MLP 15–300, MLP 63-XII-19–104, MLP 63-XII-19–105, MLP 63- XII-19–107 and MLP 63-XII-19–108
Adelphomys candidus12 Ameghino 1887 caviomorph
 Rodentia - Octodontidae
Sciamys sp.4 Ameghino 1887 caviomorph
MLP 63-XII-19–126, MLP 63- XII-19–127, MLP 63-XII-19–130 and MLP 15–24 (lectotype of S. varians), MLP 15–25, MLP 15–146 (lectotype of S. principalis), MLP 15–197, MLP 15– 218, MLP 15–222, MLP 15–349 and MLP 15–352
Sciamys latidens12 caviomorph
Sciamys principalis1 Ameghino 1887 caviomorph
MLP 63-XII-19-127, mandible
 Rodentia -
Stichomys sp.4 Ameghino 1887 caviomorph
MLP 15–144, MLP 15–199, MLP 15–209, MLP 15–210, MLP 15–211, MLP 15– 212, MLP 15–230a, MLP 15–283 (lectotype of S. regularis), MLP 15–311, MLP 15–320, MLP 15– 338, MLP 15–340, MLP 15–348, MLP 15–351a, MLP 15–351b, MLP 15–374, MLP 52-IX-27–21, MLP 63- XII-19–25/29, MLP 63-XII-19–109, MLP 63-XII-19– 111, MLP 63-XII-19–112 and MLP 63-XII-19–113
Stichomys regularis12 Ameghino 1887 caviomorph
Spaniomys sp.4 Ameghino 1877 caviomorph
MLP 15–19 (paratype of S. riparius), MLP 15–58a, MLP 15–80 (paratype of S. riparius), MLP 15–211, MLP 15–297, MLP 15–301, MLP 15–318, MLP 15–321, MLP 15–322, MLP 15– 324, MLP 15–351, MLP 15–401, MLP 15–402, MLP 61-VIII-3–408, MLP 62-XII-19–119, MLP 63-XII-19– 72, MLP 63-XII-19–73, MLP 63-XII-19–74, MLP 63- XII-19–75, MLP 63-XII-19–76, MLP 63-XII-19–78, MLP 63-XII-19–82 and MLP 63-XII-19–95
Spaniomys modestus12 Ameghino 1887 caviomorph
Spaniomys riparius12 Ameghino 1887 caviomorph
 Rodentia - Acaremyidae
Acaremys murinus2 Ameghino 1887 caviomorph
MACN A 249, 266, MLP 15-410
Acaremys tricarinatus2 Ameghino 1894 caviomorph
MLP 15-24
Acaremys messor n. sp.2 Ameghino 1889 caviomorph
MACN A 4106, mandible dp4-m3, holotype
Pseudoacaremys kramarzi2 Arnal and Vucetich 2015 caviomorph
MLP 15-197a, maxilla P4-M1
 Primates - Homunculidae
"Ecphantodon ceboides" = Homunculus patagonicus8
"Ecphantodon ceboides" = Homunculus patagonicus8 Ameghino 1891 monkey
 Notoungulata - Interatheriidae
Protypotherium claudum6 Ameghino 1889 notoungulate
 Notoungulata - Toxodontidae
"Protoxodon marmoratus n. sp." = Nesodon imbricatus5
"Protoxodon marmoratus n. sp." = Nesodon imbricatus5 Owen 1846 notoungulate
MLP 12-250, mandible