Nuevos registros de Cycadales y Cycadeoidales del Triásico superior del río Biobío, Chile

Abstract

A contribution to the knowledge of Cycadales and Cycadeoidales present in the Upper Triassic of the Santa Juana Formation (Carnian-Raetian) in the Bio-Bío Region of Chile is provided. The groups are represented by the species Pseudoctenis longipinnata Anderson & Anderson, Pseudoctenis spatulata Du Toit and Pterophyllum azcaratei Herbst & Troncoso. A new species Pseudoctenis truncata nov. sp. is described. They appear to be related to other typical elements of the paleofloristic assamblages from the south-occidental border of Gondwanaland.