Quebrada del Durazno, Cerro Cacheuta (MCNAM collection) (Triassic of Argentina)

Where: Argentina (33.1° S, 69.1° W: paleocoordinates 49.8° S, 34.8° W)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Potrerillos Formation (Uspallata Group), Carnian (237.0 - 228.0 Ma)

• Upper Section of the Potrerillos Formation

Environment/lithology: lacustrine delta plain; white shale

• The Cuyo Basin may be characterised as a passive rift basin produced as a result of generalised extension induced by crustal thinning and collapse of the Upper Palaeozoic (Gondwana) orogen (Llambías and Sato, 1990, 1995; Spalletti, 1999). It can be defined as a half graben that shows strong asymmetric structural and depositional features, as well as intrabasinal highs or transference zones that delimit different depocentres (Kokogián et al., 1988, 1993; Ramos and Kay, 1991; López Gamundí, 1994; Spalletti, 1999, 2001).
• "The Potrerillos Formation is composed of thick, coarse conglomerates at its base and by thinner conglomerates, sandstones, bentonites, mudstones, and carbonaceous shales in the middle and upper part of the unit. It represents a mix of braided-river channels, floodplain deposits, and high-sinuosity meandering channels." Martins-Neto et al., 2007 Insects come from the upper part of the formation

Size classes: macrofossils, mesofossils

Preservation: mold/impression

Collection methods: Repository: Museo de Ciencias Naturales y Antropológicas “Juan Cornelio Moyano” (Mendoza City) (MCNAM)

Primary reference: M. B. Lara and E. D. Lukashevich. 2013. The first Triassic dipteran (Insecta) from South America, with review of Hennigmatidae. Zootaxa 3710:81-92 [M. Clapham/M. Clapham]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 152023: authorized by Matthew Clapham, entered by Matthew Clapham on 02.11.2013

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Insecta
 Mecoptera - Permochoristidae
Argentinopanorpa miguezi n. gen. n. sp.
Argentinopanorpa miguezi n. gen. n. sp. Lara et al. 2015 scorpionfly
MCNAM-PI 24608
 Diptera - Hennigmatidae
Trihennigma zavattierii n. gen. n. sp.
Trihennigma zavattierii n. gen. n. sp. Lara and Lukashevich 2013 fly
MCNAM-PI 24607