LAS PLANTAS FOSILES DE LA FORMACION EL RATON (PROVINCIA DE SAN JUAN)

AZCUY, C.; CESARI, S.N.; LONGOBUCCO, M.

AMEGHINIANA

ASOCIACION PALEONTOLOGICA ARGENTINA

Año: 1981

0002-7014

THE FOSSILPLANTSOF EL RATÓNFORi\IATION(SAN JUANPnOVINCE,ARGENTINA).-A group of fossil plants brought from the area of Calingasta (El Ratón Formation) is described.Lepidodendropsis sekondiensis Mensah & Chaloner, Diplotmema devonica (Freng.) nov.comb., ?Diplotmema tlichotoma (Freng.) Wagner, Bhodea sp., ?Telangiopsis sp., some probablyfemale pteridosperm fructifications and some megaspores were recognized. Except for the Lepidodendrales,the remaining elements of the flora have, as a whole, lyginopteridacean affinities.This is considered the first record of this group for the Carboniferous in our country. Thetaxonomic position and the chronologic value of the recognized taxa are discussed, and a lateEarly Carboniferous age is assigned to this association.