Arroyo Malo main section, sample 18 (Triassic of Argentina)

Where: Mendoza, Argentina (34.8° S, 69.9° W: paleocoordinates 40.5° S, 29.3° W)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Arroyo Malo Formation, Rhaetian (208.5 - 201.3 Ma)

• The report of Choristoceras cf. marshi Hauer from some levels of this sequence (Riccardi & Iglesia Llanos, 1999; Riccardi, 2008c) supports a late Rhaetian age for that part of the succession. Most of the fauna described here was found between 10 and 80 m below the main level with Choristoceras.

• bed-level stratigraphic resolution

Environment/lithology: prodelta; lithified mudstone

• Mainly fandeltaic facies with planar laminated mudstones, fine sandstones and conglomeratic lenses deposited by low- and high-density turbidity currents and debris flows.

Size class: macrofossils

Preservation: mold/impression

Reposited in the MLP

• The material described here was collected over many years from different fossiliferous levels of the Arroyo Malo Formation during several field seasons.

Primary reference: S. E. Damborenea and M. O. Manceñido. 2012. Late Triassic bivalves and brachiopods from southern Mendoza, Argentina. Revue de Paléobiologie, Genève, vol. spéc 11:317-344 [M. Clapham/M. Clapham]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 132726: authorized by Matthew Clapham, entered by Matthew Clapham on 25.08.2012

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Bivalvia
 Pectinida - Pectinoidae
? Praechlamys cf. valoniensis
? Praechlamys cf. valoniensis Defrance 1825 scallop
 Pectinida - Limidae
Pseudolimea riccardii
Pseudolimea riccardii Damborenea 2012 file clam