PALINOLOGIA DE LA FORMACION LAS CABRAS (TRIASICO) EN SU LOCALIDAD TIPO, CUENCA CUYANA (PROVINCIA DE MENDOZA, ARGENTINA).PARTE 2. ESPORAS, TRILOBITES Y MONOLETES

Abstract

In this second parT 33 species of trilete and monolete spores from Las Cabras Formation in its type locality, Cuyo Basin are described. They belong to the following genera: Leptolepidites, Uvaesporites, Lycopodiacidites, Cirratriradites, Cingulatisporites, Lycospora, Densosporites, Punctatosporites y Polypodiisporites. The botanical affinity, chronological range, regional and global distribution of alL species included in this study are given. AIso the new combination of Leptolepidites (al. Uvaesporites) lobatoverrucosus Hiltmann, 1967 is proposed. Finally, the main groups of pteridophyta present along the sequence are analyzed as preliminary concIusions of this sisternatic study (Par! 1 and 2). 21 species of spores are regislred for the first time in the Iriassic sediments of the Cuyo Basin, belonging to 9 genera which are also recorded for the first time in the Argentine Triassic. The age of Las Cabras Formation microflora in its type locality, is Middle Triassic (Upper Anisian-Ladinian). Las Cabras Formation Ttgether with Potrerillos and Cacheuta Formations are compared to the "Ipswich Microflora" of the Middle Triassic to early Upper Triassic of Australia.