PBDB Collection

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

Show authors, comments, and common names

Mammalia
Microbiotheria - Microbiotheriidae	Microbiotherium tehuelchum¹¹, Microbiotherium patagonicum n. gen. n. sp.¹¹ 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
Sparassodonta -	"Sipalocyon gracilis" = Sipalocyon gracilis¹⁰, "Hathliacynus lynchi n. sp." = Sipalocyon gracilis¹⁰, Acyon tricuspidatus¹⁴, "Cladosictis patagonica n. gen. n. sp." = Cladosictis patagonica¹⁰, "Agustylus cynoides n. sp." = Cladosictis patagonica¹⁰, Lycopsis torresi n. gen. n. sp.⁹ "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 "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 Lycopsis torresi n. gen. n. sp.⁹ Cabrera 1927 metatherian MLP 11-113, partial skull, holotype
Sparassodonta - Borhyaenidae	Borhyaena tuberata¹⁴, Acrocyon sectorius¹⁴ Borhyaena tuberata¹⁴ Ameghino 1887 metatherian Acrocyon sectorius¹⁴ Ameghino 1887 metatherian MLP 11-70
Rodentia - Chinchillidae	Prolagostomus pusillus¹², Pliolagostomus notatus n. sp.¹⁶ Prolagostomus pusillus¹² Ameghino 1887 chinchilid Pliolagostomus notatus n. sp.¹⁶ Ameghino 1887 chinchilid Holotype: MLP 15-18 and other MLP specimens
Rodentia -	Eocardia montana¹², Eocardia excavata¹², Neoreomys australis¹² Eocardia montana¹² Ameghino 1887 caviomorph Eocardia excavata¹² Ameghino 1891 caviomorph Neoreomys australis¹² Ameghino 1887 caviomorph
Rodentia - Eocardiidae	"Eocardia fissa" = Dicardia fissa¹², Phanomys vetulus n. sp.¹³, Phanomys mixtus n. gen. n. sp.¹³, Schistomys erro¹² "Eocardia fissa" = Dicardia fissa¹² Ameghino 1891 caviomorph Phanomys vetulus n. sp.¹³ Ameghino 1891 caviomorph MACN A 2024 Phanomys mixtus n. gen. n. sp.¹³ Ameghino 1887 caviomorph MACN A 11302, maxilla fragment, "lectotype"; MACN A 2022, isolated cheek teeth, "neosyntype" Schistomys erro¹² Ameghino 1887 caviomorph
Rodentia -	Steiromys detentus¹², Steiromys duplicatus¹² Steiromys detentus¹² Ameghino 1887 caviomorph Steiromys duplicatus¹² Ameghino 1887 caviomorph
Rodentia - Dinomyidae	Scleromys angustus¹² Scleromys angustus¹² Ameghino 1887 caviomorph
Rodentia - Neoepiblemidae	Perimys zonatus¹², Perimys erutus¹², Perimys incavatus¹², Perimys onustus¹² Perimys zonatus¹² Ameghino 1887 caviomorph Perimys erutus¹² Ameghino 1887 caviomorph Perimys incavatus¹² Ameghino 1902 caviomorph Perimys onustus¹² Ameghino 1887 caviomorph
Rodentia -	"Stichomys constans" = Acarechimys constans³, "Acarechimys constans" = Acarechimys constans³, Acarechimys minutissimus³, Acarechimys gracilis³, "Acaremys minutus" = Acarechimys minutus³ "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 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 "Acaremys minutus" = Acarechimys minutus³ Patterson and Pascual 1967 caviomorph MLP 15-410a (syntype of Acaremys minutus)
Rodentia - Octodontidae	Sciamys sp.⁴, Sciamys latidens¹², Sciamys principalis¹ 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 -	Adelphomys sp.⁴, Adelphomys candidus¹², Spaniomys sp.⁴, Spaniomys riparius¹², Spaniomys modestus¹² 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 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 riparius¹² Ameghino 1887 caviomorph Spaniomys modestus¹² Ameghino 1887 caviomorph
Rodentia - Acaremyidae	Acaremys murinus², Acaremys tricarinatus², Acaremys messor n. sp.², Pseudoacaremys kramarzi² 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
Rodentia -	Stichomys sp.⁴, Stichomys regularis¹² 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
Primates - Homunculidae	"Ecphantodon ceboides" = Homunculus patagonicus⁸ "Ecphantodon ceboides" = Homunculus patagonicus⁸ Ameghino 1891 monkey
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, Peltephilus strepens¹⁵ Peltephilus pumilus¹⁵ Ameghino 1887 edentate MACN-A 866–870, osteoderms Peltephilus strepens¹⁵ Ameghino 1887 edentate MACN-A 771, osteoderms
Notoungulata - Toxodontidae	"Protoxodon marmoratus n. sp." = Nesodon imbricatus⁵ "Protoxodon marmoratus n. sp." = Nesodon imbricatus⁵ Owen 1846 notoungulate MLP 12-250, mandible
Notoungulata - Interatheriidae	Protypotherium claudum⁶ Protypotherium claudum⁶ Ameghino 1889 notoungulate

¹Arnal and Vucetich 2011; ²Arnal and Vucetich 2015; ³Arnal et al. 2017; ⁴Carvalho and Salles 2004; ⁵Cassini et al. 2012; ⁶Fernández et al. 2023; ⁷Fernicola and Vizcaino 2008; ⁸Kay and Perry 2019; ⁹Marshall 1979; ¹⁰Marshall 1981; ¹¹Marshall 1982; ¹²McGrath et al. 2023; ¹³Pérez and Vucetich 2011; ¹⁴Prevosti et al. 2012; ¹⁵Vizcaíno et al. 2012; ¹⁶Vucetich 1984