UNA NUEVA ESPECIE DEL GENERO ARAUCARIOXYLON KRAUS 1870, EMEND. MAHESHWARI 1972 DELTRIASICO DE AGUA DE LA ZORRA, USPALLATA, MENDOZA, ARGENTINA

Mariana Brea

Abstract


Petrified wood of a new species of Araucarioxylon has been described from Triassic sediments of Agua de la Zorra, Uspallata, Mendoza province, Argentina. The description of this fossil is based on anatomically preserved stems. The secondary xylem shows conspicuos growth rings. Pitting on the radial and tangencial walls of the tracheids is bordered. Rays are low, uniseriate. Three to nine bordered pits are present in the cross fields. The comparisons of these fossils with an other conifers stems and their paleoclimatic evidence are also analyzed.

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