Agua de las Avispas, Cerro Cacheuta (MMHN collection) (Triassic of Argentina)

Where: Argentina (33.1° S, 69.1° W: paleocoordinates 49.7° S, 34.8° W)

• coordinate stated in text

• outcrop-level geographic resolution

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

• Upper Section of the Potrerillos Formation

Environment/lithology: fluvial; 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 Municipal de Historia Natural de San Rafael, Mendoza, Argentina (MMHN)

Primary reference: F. J. Marquat. 1991. Ninfa de miomoptero (Insecta) del Triasico de Mendoza, Republica Argentina. Revista del Museo de Historia Natural de San Rafael-Mendoza 11:3-13 [M. Clapham/M. Clapham]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 123021: authorized by Matthew Clapham, entered by Jered Karr on 10.01.2012

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Insecta
 Grylloblattodea -
"Delopterum acostai n. sp." = Triasseuryptilon acostai
"Delopterum acostai n. sp." = Triasseuryptilon acostai Marquat 1991 ice crawler
MMHN 1518