New gymnospermous woods from the Permian of the Parnaiba Basin, Northeastern Brazil, Part I: Ductoabietoxylon, Scleroabietoxylon and Pamaiboxylon

作者：Kurzawe Francine^*; Iannuzzi Roberto; Merlotti Sheila; Roessler Ronny; Noll Robert

来源：Review of Palaeobotany and Palynology, 2013, 195: 37-49.

DOI：10.1016/j.revpalbo.2012.12.004

• permineralized gymnosperm woods
• Permian
• Parnaiba Basin

The Permian permineralized flora of the Parnaiba Basin, NE Brazil, has been studied since 1872, when the first fossil fern was described from this region. Since then, many fossil pteridophytes have been collected and studied; however, the gymnosperms are still little known. The present contribution focuses on the study of gymnospermous woods from the Motuca Formation. This study presents four new taxa of which three are formally described: Ductoabietoxylon soils gen. et sp. nov., Scleroabietoxylon chord as gen. et sp. nov., Parnaiboxylon rohnae gen. et sp. nov. and Parnaiboxylon sp. I. The first two genera share an outstanding feature: the presence of abietinoid pitting, a rare characteristic among fossil woods, and a derived stage in the evolution of xylem rays. The presence of several new genera and species in the lowermost Motuca Formation reveals the richness and importance of this area for paleobotanical studies.

• 出版日期2013-8-16