Paleozoic seed ferns: Heterangium kentuckyensis sp. nov., from the Upper Carboniferous of North America.

K. B. Pigg, T. N. Taylor, R. A. Stockey

Research output: Contribution to journalArticle

21 Scopus citations

Abstract

Heterangium kentuckeyensis sp. nov. is described from Lower/Middle Pennsylvanian sediments of eastern Kentucky, based on permineralized stems, petioles, frond members, laminar foliage, and roots, including several organs in attachment. The characters used to distinguish the subgenera of Heterangium are evaluated and found to be unreliable. Moreover, suggested phylogenetic schemes both within Heterangium and between this taxon and other lyginopterid pteridosperms based on these features are inconsistent with stratigraphic data. Until reproductive features are known, the classification of Heterangium species is best based on characters of the vegetative sporophyte, including stelar organization, cortical histology, and frond morphology. - from AuthorsKentucky new taxon

Original languageEnglish (US)
Pages (from-to)1184-1204
Number of pages21
JournalAmerican Journal of Botany
Volume74
Issue number8
DOIs
StatePublished - Jan 1 1987
Externally publishedYes

ASJC Scopus subject areas

  • Ecology, Evolution, Behavior and Systematics
  • Genetics
  • Plant Science

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