Chañares River, 4 km north (Triassic of Argentina)

Also known as Los Chañares

Where: La Rioja, Argentina (29.8° S, 67.8° W: paleocoordinates 49.9° S, 37.8° W)

• coordinate estimated from map

• small collection-level geographic resolution

When: Chañares Formation (Agua de la Peña Group), Ladinian (242.0 - 237.0 Ma)

• bed-level stratigraphic resolution

Environment/lithology: fluvial-lacustrine; lithology not reported

Size class: macrofossils

Preservation: concretion

Collected by A. Romer & J. Jensen in 1964; reposited in the MCZ, MLP

Collection methods: quarrying, mechanical,

Primary reference: A. S. Romer and J. A. Jensen. 1966. The Chañares (Argentina) Triassic reptile fauna. II. Sketch of the geology of the Río Chañares-Río Gualo region. Breviora 252:1-20 [M. Carrano/M. Carrano]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 13271: authorized by John Alroy, entered by Robin Whatley on 09.02.2002, edited by Matthew Carrano and Richard Butler

Creative Commons license: CC BY (attribution)

Taxonomic list

Osteichthyes
 Therapsida - Traversodontidae
"Massetognathus teruggii" = Massetognathus pascuali4
"Massetognathus teruggii" = Massetognathus pascuali4 Romer 1967 cynodont
"parts of a gomphodont skeleton"
Reptilia
 Dinosauromorpha - Silesauridae
Lewisuchus admixtus n. gen. n. sp.2
Lewisuchus admixtus n. gen. n. sp.2 Romer 1972 ornithodiran
MLP 65-XI-14-14 (= PULR 01), partial skull and postcranial material
 Dinosauromorpha -
Lagosuchus sp.3 Romer 1971 rabbit crocodile
 Lagerpetidae - Lagerpetidae
Lagerpeton chanarensis3 Romer 1971 ornithodiran
 Diapsida - Proterochampsidae
Proterochampsidae indet.1 Romer 1966 archosauromorph
Chanaresuchus sp.1 Romer 1971 archosauromorph
PULR 07