On a new species of the calamitalean fossil-genus Annularia from the Douro Basin (lower Gzhelian; NW Portugal)

Pedro Correia, Zbynĕk Šimůnek, Christopher J. Cleal, Bruno Vallois, Rúben Domingos, Artur A. Sa

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

This paper deals with a new species of the calamitalean fossil-genus Annularia von Sternberg, Annularia noronhai sp. nov., from the Douro Basin (lower Stephanian C/lower Gzhelian, Upper Pennsylvanian), in north-western Portugal. A. noronhai sp. nov. is distinguished mainly by its lanceolate leaves with acuminate to caudate apices, which are characterised by having a very elongate mucro. Among the known species of Annularia, Annularia spinulosa is the most similar. In this study, we also reassess the taxonomic status of A. spinulosa based on comparisons between its type specimen (holotype) and specimens from Douro Basin described to this fossil-species.

Original languageEnglish
JournalHistorical Biology
DOIs
Publication statusAccepted/In press - 1 Jan 2019

Keywords

  • Annularia
  • Calamitaceae
  • Douro Basin
  • Equisetales
  • lower Gzhelian
  • Portugal

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