Yacimiento 2, south-western side of the Cerro El Mastil (Triassic of Argentina)

Also known as "[T]hese layers [The locality Yacimiento 2] were called ‘Horizonte Leonense’ or ‘Horizonte Pumense’ by Rusconi (Romer 1960)." López-Arbarello & Zavittieri 2008 (p. 1028)

Where: Mendoza, Argentina (32.8° S, 68.9° W: paleocoordinates 42.4° S, 31.9° W)

• coordinate based on nearby landmark

• small collection-level geographic resolution

When: Potrerillos Formation (Uspallata Group), Late/Upper Triassic (237.0 - 201.3 Ma)

• Potrerillos Formation, Cuyana Basin, lower Upper

•Triassic (Morel et al. 2002b).

• group of beds-level stratigraphic resolution

Environment/lithology: fluvial-lacustrine; lithified siltstone

• "This section was interpreted by Kokogian and Mancilla (1989, pp. 180–182) as corresponding to fluvial low sinuosity courses in a mud floodplain, with crevasses splays, which grades upwards into lacustrine deltas with extended lacustrine sub-environments and pass into euxinic lacustrine black-shale deposits of the Cacheuta Formation." López-Arbarello & Zavattieri 2008
• "In the El Challao section, particularly the outcrops of the Potrerillos Formation are mainly represented by cross-bedded sandstones, mudstones,bituminous shales, and thin stromatolitic limestones." López-Arbarello & Zavattieri 2008 (p.1028)

Size class: macrofossils

Reposited in the AMNH

• MCNAM-PV, Museo de Ciencias Naturales y Antropológicas ‘J. C. Moyano’, Mendoza, Argentina

Primary reference: A. López-Arbarello and A. M. Zavattieri. 2008. Systematic revision of Pseudobeaconia Bordas, 1944, and Mendocinichthys Whitley, 1953 (Actinopterygii: 'Perleidiformes') from the Triassic of Argentina. Palaeontology 51(5):1025-1052 [P. Wagner/P. Wagner]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 117883: authorized by Matthew Clapham, entered by Phillip Elliott on 28.09.2011, edited by Christina Feng

Creative Commons license: CC BY (attribution)

Taxonomic list

Actinopteri
 Louwoichthyiformes - Pseudobeaconiidae
Pasambaya tellecheai Rusconi 1946
Pseudobeaconia celestae n. sp. López-Arbarello and Zavattieri 2008
MCNA-PV 944a ⁄ b (Holotype, complete specimen); AMNH 8282 (Paratype); AMNH 8279 and 8287; MCNA-PV 1238 and 3810–13