Heidiphyllum, Rissikia y Desmiophyllum (Pinophyta, Coniferales) in the Triassic of northern Chile and southern Argentina

Abstract

Troncoso, A. Departamento de Biologia Vegetal,Universidad de Talca, Casilla 747, Talca, Chile.Species of the genera Heidiphyllum (H. elongatum), Rissikia [R. media (Tenison-Woods) Townrow] and Desmiophyllum [D. cacheutense (Kurtz) nov. comb., D. sp.] found in the Triassic of northern Chile and southern Argentina are described. A brief discussion of the history and validity of the generic name Desmiophyllum for long and narrow, parallel-veined leaves lacking cuticle is given to reassess its use