PBDB Collection

Alto Río Cisnes (Miocene of Chile)

Where: Aisén, Chile (44.6° S, 71.2° W: paleocoordinates 45.2° S, 66.3° W)

• coordinate stated in text

• local area-level geographic resolution

When: Friasian mammal zone, Río Frias Formation, Friasian (16.3 - 15.5 Ma)

• Vera, et al. 2018: Two 40Ar/39Ar dates of “about 16.5 Ma” (Flynn & Swisher 1995, p. 325) and 14.83 ± 0.17 Ma (de la Cruz & Cort?es 2011) indicate a Burdigalian?Langhian age.

• formation-level stratigraphic resolution

Environment/lithology: fluvial; tuff and fine-grained, medium, brown, white sandstone

• The sediments of the Río Frías Formation were deposited in a high energy continental fluvial environment.

• This unit consists of dacitic and rhyolitic tuffs, tuffites, siltstones, and fine to medium sands which are principally white, light brown and/or orange in color. The sediments are generally well stratified, poorly consolidated and horizontal to subhorizontal, dipping ca. 30 to the north.

•Vera, et al. 2018: continental pyroclastic sequence belonging to the R?ıoFr?ıas Formation at Alto R?ıo Cisnes, Chile (Fig. 1). This unit is characterized mainly by tuffs, tuffites and palaeosols (Dal Mol?ın 1998; Escosteguy et al. 2003; de la Cruz & Cort?es 2011; Bostelmann et al. 2012 and references cited therein)

Size class: macrofossils

Reposited in the MNHN

• Specimens from Vera, et al. 2018 come from Roth's collection

Primary reference: L. G. Marshall. 1990. Fossil Marsupialia from the type Friasian Land Mammal Age (Miocene), Alto Rio Cisnes, Aisen, Chile. Revista Geológica de Chile 17(1):19-55 [C. Jaramillo/J. Carrillo/J. Carrillo]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 139845: authorized by Carlos Jaramillo, entered by Juan Carrillo on 19.02.2013, edited by Miranta Kouvari and Grace Varnham

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names

Mammalia
Microbiotheria - Microbiotheriidae	Microbiotherium tehuelchum Microbiotherium tehuelchum Ameghino 1887 marsupial
Paucituberculata - Pichipilidae	Pichipilus halleuxi n. sp. Pichipilus halleuxi n. sp. Marshall 1990 marsupial
Paucituberculata - Abderitidae	Abderites meridionalis, Pitheculites rothi n. sp. Abderites meridionalis Ameghino 1887 marsupial Pitheculites rothi n. sp. Marshall 1990 marsupial
Paucituberculata - Palaeothentidae	Parabderites bicrispatus, Palaeothentes minutus, Palaeothentes lemoinei, Palaeothentes intermedius Parabderites bicrispatus Ameghino 1902 marsupial Palaeothentes minutus Ameghino 1887 marsupial Palaeothentes lemoinei Ameghino 1887 marsupial Palaeothentes intermedius Ameghino 1887 marsupial
Sparassodonta -	Sipalocyon gracilis, Cladosictis patagonica Sipalocyon gracilis Ameghino 1887 metatherian Cladosictis patagonica Ameghino 1887 metatherian
Sparassodonta - Borhyaenidae	Prothylacynus patagonicus, Borhyaena tuberata Prothylacynus patagonicus Ameghino 1891 metatherian Borhyaena tuberata Ameghino 1887 metatherian
Notoungulata - Interatheriidae	Protypotherium "sp. nov?"³, Protypotherium australe¹, "Protypotherium cf. endiadys" = Protypotherium praerutilum³ Protypotherium "sp. nov?"³ Ameghino 1882 notoungulate MLP12-2876a (Kraglievich in 1930 thought it's Protypotherium sp.) Protypotherium australe¹ Moreno 1882 notoungulate "Protypotherium cf. endiadys" = Protypotherium praerutilum³ Ameghino 1887 notoungulate MLP12-2880a (Kraglievich in 1930 thought it's Protypotherium sp.)
Notoungulata - Hegetotheriidae	Pachyrukhos sp.¹ Pachyrukhos sp.¹ Ameghino 1885 notoungulate
Notoungulata - Toxodontidae	Palyeidodon obtusum¹ Palyeidodon obtusum¹ Roth 1898 notoungulate
Cingulata - Propalaehoplophoridae	"Eucinepeltus cf. petesatus" = Encinepeltus petesatus¹ "Eucinepeltus cf. petesatus" = Encinepeltus petesatus¹ Ameghino 1891 edentate
Rodentia - Dinomyidae	? Simplimus sp.¹ ? Simplimus sp.¹ Ameghino 1904 caviomorph
Rodentia - Neoepiblemidae	Perimys sp.¹ Perimys sp.¹ Ameghino 1887 caviomorph
Rodentia -	Protacaremys sp.¹, Acarechimys sp.¹, Neoreomys australis¹ Protacaremys sp.¹ Ameghino 1902 caviomorph Acarechimys sp.¹ Patterson 1965 caviomorph Neoreomys australis¹ Ameghino 1887 caviomorph
Rodentia - Chinchillidae	Prolagostomus sp.¹ Prolagostomus sp.¹ Ameghino 1887 chinchilid
Primates -	Platyrrhini indet.² Platyrrhini indet.² monkey

¹Charrier and Croft 2015; ²Tejedor 2003; ³Vera et al. 2019