Primer registro de Neocalamites (Halle) Vladimirovicz en el Pérmico de Gondwana
Abstract
Resumen. Se describen por primera vez para el Pérmico de Gondwana restos plantíferos asignables al género Neocalamites (Halle) Vladimirovicz. El material estudiado, impresiones y compresiones, procede de la Formación La Golondrina, Santa Cruz, y consiste de ejes carenados con verticilos foliares y estróbilos con verticilos de esporangióforos, sin brácteas. Sobre bases tafonómicas e íntima asociación, se considera que ambos órganos pudieron formar parte de la misma planta (Neocalamites sp.). Se discute la inclusión de este taxón en la familia Equisetaceae como así también aspectos filogenéticos del mismo dentro del clado de las Equisetales. Abstract. FIRST RECORD OF NEOCALAMITES (HALLE) VLADIMIROVICZ IN THE PERMIANOF GONDWANA.Plant remains assigned to the genus Neocalamites (Halle) Vladirmirovicz are described for the first time in the Permian of Gondwana. The studied material consists of impressions and compressions from the La Golondrina Formation, Santa Cruz Province. It is represented by ribbed axes and foliar whorls and strobili composed of whorled sporangiophores without bracts. Based on taphonomic evidence and close association both taxa were likely parts of the same plant (Neocalamites sp.). The inclusion of this taxon in the family Equisetaceae, as well as its phylogenetic relationships as part of the equisetalean clade, are discussed.Downloads
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