IDEAN   23403
INSTITUTO DE ESTUDIOS ANDINOS "DON PABLO GROEBER"
Unidad Ejecutora - UE
artículos
Título:
Tetrapod and invertebrate trace fossils from eolian deposits of the lower Permian of central-western Argentina
Autor/es:
KRAPOVICKAS, VERONICA; MARSICANO, CLAUDIA; MANCUSO, ADRIANA; DE LA FUENTE, M.; OTTONE, EDUARDO
Revista:
Historical Biology
Editorial:
Taylor and Francis
Referencias:
Año: 2015 vol. 27 p. 827 - 842
ISSN:
0891-2963
Resumen:
Abundant tetrapod footprints are described from the Early Permian Yacimiento Los Reyunos Formation including bothcollected and in situ specimens. The slabs come from several quarries at the Sierra Pintada and Sierra de las Pen?as area,south-west of Mendoza, Argentina. The trace fossil assemblage, which constitutes one of the oldest known from Gondwana,comprises excellent-preserved tetrapod tracks (Chelichnus duncani, Chelichnus gigas and ?pear-like? footprints) andinvertebrate simple sub-horizontal (Palaeophycus tubularis) and vertical (Skolithos isp.) burrows formed in a aeolian dunefield. The analysis of the tetrapod track producers indicates the presence of at least three different taxa of sprawling to semierecttherapsids, thus suggesting the presence of members of this clade, or closest relatives, in the Early Permian of southernGondwana. Moreover, a series of measurements and simple indexes were developed to estimate body proportions andlocomotion styles of the putative trackmakers. The new assemblage, analysed in the context of other known Permianassemblages from Pangea, is one the few known in Gondwana to be present in an aeolian environment. The evaluation of theassemblage, in the light of aeolian ichnofacies (Chelichnus, Octopodichnus and Entradichnus), shows that it has commonelements with the Chelichnus and Entradichnus ichnofacies.