Cañadon del Tordillo (Miocene of Argentina)

Where: Neuquén, Argentina (40.4° S, 70.2° W: paleocoordinates 40.9° S, 66.1° W)

• coordinate stated in text

• local area-level geographic resolution

When: Colloncuran mammal zone, Collón Cura Formation, Middle Miocene (16.0 - 11.6 Ma)

• Fossils are found just above or below Pilcaniyeu Ignimbritic member (Fig 3).

•Most of the fossils and all the primates occur in paleosols at the top of the ignimbrite member or just above it.

• member-level stratigraphic resolution

Environment/lithology: terrestrial; tuff

• flow tuff

Size classes: macrofossils, mesofossils

Collected in 1990-1991; reposited in the MLP

Collection methods: bulk, surface (in situ),

• In 1990 and 1991, a group from Museo de La Plata (MLP) and Duke University returned to Cañadón del Tordillo and made another, larger collection of fossil vertebrates.

Primary reference: M. G. Vucetich, M. M. Mazzoni, and U. F. J. Pardiñas. 1993. Los roedores de la Formación Collon Curá (Mioceno Medio), y la ignimbrita Pilcaniyeu. Cañadón del Tordillo, Neuquen. Ameghiniana 30(4):361-381 [C. Jaramillo/J. Carrillo]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 141175: authorized by Carlos Jaramillo, entered by Juan Carrillo on 21.03.2013

Creative Commons license: CC BY (attribution)

Taxonomic list

Mammalia
 Primates - Pitheciidae
Propithecia neuquenensis n. gen. n. sp.1
Propithecia neuquenensis n. gen. n. sp.1 Kay et al. 1998 monkey
 Rodentia - Chinchillidae
Prolagostomus sp. Ameghino 1887 chinchilid
 Rodentia - Dasyproctidae
Dasyproctidae indet. Gray 1825 caviomorph
Neoreomys sp. Ameghino 1887 caviomorph
Alloiomys sp. Vucetich 1977 caviomorph
 Rodentia - Eocardiidae
Eocardiidae indet. Ameghino 1891 caviomorph
 Rodentia - Erethizontidae
Neosteiromys tordillense n. sp. Vucetich et al. 1993 porcupine
5 specimens
 Rodentia - Acaremyidae
Galileomys colloncurensis n. sp.2 Vucetich and Kramarz 2003 caviomorph
 Rodentia - Echimyidae
Maruchito trilofodonte n. gen. n. sp.
Maruchito trilofodonte n. gen. n. sp. Vucetich et al. 1993 spiny rat
8 specimens
 Rodentia -
Acarechimys sp. Patterson 1965 caviomorph
Protacaremys denisae n. sp. Vucetich et al. 1993 caviomorph