Río Frías (Miocene of Chile)

Also known as Alto Río Cisnes, Aisén, Friaséen, Friasian

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

• coordinate stated in text

• outcrop-level geographic resolution

When: Río Frías Formation, Friasian (16.3 - 15.5 Ma)

Environment/lithology: terrestrial; lithology not reported

Size class: mesofossils

Collected by Santiago Roth in 1897-1898; reposited in the MLP

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 176666: authorized by Jelle Zijlstra, entered by Jelle Zijlstra on 25.02.2016, edited by Miranta Kouvari

Creative Commons license: CC BY (attribution)

Taxonomic list

 Notoungulata - Toxodontidae
Nesodon sp. Owen 1846 notoungulate
Adinotherium sp. Ameghino 1887 notoungulate
Prototrigodon rothi n. gen. n. sp. Kraglievich 1930 notoungulate
 Notoungulata - Homalodotheriidae
Homalodotherium sp. Huxley 1870 notoungulate
 Notoungulata - Hegetotheriidae
Pachyrukhos sp. Ameghino 1885 notoungulate
 Notoungulata - Mesotheriidae
Eutypotherium sp. Roth 1901 notoungulate
 Notoungulata - Protypotheriidae
Protypotherium sp. Ameghino 1882 notoungulate
 Rodentia - Dasyproctidae
Alloiomys friasensis n. sp. caviomorph
 Cingulata - Dasypodidae
"Prozaedius sp." = Prozaedyus
"Prozaedius sp." = Prozaedyus Ameghino 1891 armadillo
 Xenarthra - Megatheriidae
 Xenarthra - Mylodontidae
Neonematherium sp. Ameghino 1904 edentate
 Xenarthra -
"? Palaehoplophorus sp." = Palaeohoplophorus
"? Palaehoplophorus sp." = Palaeohoplophorus Ameghino 1883 edentate
 Xenarthra - Propalaehoplophoridae
? Propalaehoplophorus sp. Ameghino 1887 edentate
 Ungulata - Adianthidae
Adianthus godoyi n. sp. Cifelli 1991 eutherian
Holotype: Duke-MNHN CH89-109
 Ungulata - Macraucheniidae
Theosodon sp. Ameghino 1887 eutherian
Phoenixauchenia sp. Ameghino 1904 eutherian
 Ungulata - Astrapotheriidae