A reappraisal of Neocalamites and Schizoneura (fossil Equisetales) based on material from the Triassic of East Antarctica

摘要: Sphenophytes are a common floral element in the Triassic of Gondwana. Most sphenophyte compression fossils have been conventionally assigned to few, presumably very widespread species Neocalamites based on vegetative features stems (or pith casts) and foliage. During recent decades, however, new reports morphological anatomical details some these cast doubt systematic affinities many Gondwanan sphenophytes. Here we describe suberosus (Artabe & Zamuner) nov. comb. et emend. Schizoneura africana Feistmantel from several deposits central Transantarctic Mountains Victoria Land, East Antarctica. The material enables critical reevaluation that historically used define two genera, including leaf-base morphology, degree leaf fusion, stem vasculature vallecular canals, nodal diaphragm. diagnoses Schizo...