First Late Triassic Record of a Paleoentomofauna from South America(Malargüe Basin,Mendoz

First Late Triassic Record of a Paleoentomofauna from South America(Malargüe Basin,Mendoza

Province,Argentina)

Carsten BRAUCKMANN;Oscar F.GALLEGO;Norbert HAUSCHKE;Rafael G.MARTINS-NETO;Elke GROENING;Jan-M.ILGER;María B.LARA

【期刊名称】《地质学报（英文版）》 【年(卷),期】2010(084)004

【摘要】Late Middle Triassic to early Late Triassic insects from Argentina have been previously described from the Bermejo and Cuyana Basins where they have been recovered from the Ischichuca-Los Rastros and Potrerillos-Cacheuta Formations,respectively.The insect fauna discussed herein was collected during field studies in 1986/1987 from the Llantenes section(Norian to Rhaetian? Late Triassic),which is situated in the Malargtie Basin in southern Mendoza province.The insect remains were found in the upper part of the Llantenes section(Llantenes Formation),which is built up of two coarsening-upwards cycles reflecting a deltaic progradation of a fluvial into a lacustrine environment(lower part),succeeded by repeated progradations into a floodplaindominated

environment(upper

remains,plant

part;

with

finds

of

insects,conchostracans,fish fragments,and drifted

logs).The new finds represent the youngest Triassic insect records described from Argentina and even from South America in its