Palinologia de la Formación Las Cabras (Triásico) en su localidad tipo, Cuenca Cuyana (Provincia de Mendoza, Argentina). Part 2: Esporas triletes y monoletes

ZAVATTIERI, A. M.

AMEGHINIANA

ASOCIACION PALEONTOLOGICA ARGENTINA

Lugar: Buenos Aires; Año: 1990 vol. 27 p. 207 - 224

0002-7014

In this second part 33 species of trilete and monolete spores from Las Cabras Formation in its type locality, CuyoBasin are described. They belong to the following genera: Leptolepidites, Uvaesporites, Lycopodiacidites,Cirratriradites, Cingulatisporites, Lycospora, Densosporites, Punctatosporites and Polypodiisporites. The botanical affinity, chronologicalrange, regional and global distribution of all species included in this studyare given. Also the new combinationof Leptolepidites (al. Uvaesporites) lobatoverrucosus Hiltmann, 1967 is proposed. Finally, the main groups ofpteridophyta present along the sequence are analyzed as preliminary concIusions of this sisternatic study (Part 1 and 2).21 species of spores are registred for the first time in the Triassic sediments of theCuyo Basin, belonging to 9 generawhich are also recorded for thefirst time in the Argentine Triassic.The age of Las Cabras Formation microflora in its typelocality, is Middle Triassic (UpperAnisian-Ladinian). Las Cabras Formation together with Potrerillos and Cacheuta Formations are compared to the "Ipswich Microflora" ofthe Middle Triassic to early UpperTriassic of Australia.