An anatomically preserved stem from the Carboniferous of Gondwana: Phyllocladopitys petriellae Brea and Césari, sp. nov.

BREA M.; CESARI, S.N.

REVIEW OF PALAEOBOTANY AND PALYNOLOGY

ELSEVIER SCIENCE BV

Lugar: Amsterdam; Año: 1995

0034-6667

Phyllocladopitys petriellae Brea and Césari. sp. nov. occurs in the early Late Carboniferous Jejenes Formation,Argentina. The description of the taxon is based on one anatomically preserved stem, a few centimeters in diameter.The primary xylem is mesarch. The secondary xylem shows only inconspicuous growth rings. Pitting on the walls ofthe tracheids is bordered. Rays are low. uni- or biseriate. Two to four simple pits are present in the cross fields.Comparisons are made with early gymnosperms and Cordaitales and paleoclimatic evidence is analyzed