On the Phylogenetic Position of Cystodium It's Not a Tree Fern – It's a Polypod!

Petra Korall; David S. Conant; Harald Schneider; Kunihiko Ueda; Harufumi Nishida; Kathleen M. Pryer

doi:10.1640/0002-8444(2006)96[45:OTPPOC]2.0.CO;2

How to translate text using browser tools

1 April 2006 On the Phylogenetic Position of Cystodium: It's Not a Tree Fern – It's a Polypod!

Petra Korall, David S. Conant, Harald Schneider, Kunihiko Ueda, Harufumi Nishida, Kathleen M. Pryer

Author Affiliations +

American Fern J., 96(2):45-53 (2006). https://doi.org/10.1640/0002-8444(2006)96[45:OTPPOC]2.0.CO;2

Abstract

The phylogenetic position of Cystodium J. Sm. is studied here for the first time using DNA sequence data. Based on a broad sampling of leptosporangiate ferns and two plastid genes (rbcL and atpB), we show that Cystodium does not belong to the tree fern family Dicksoniaceae, as previously thought. Our results strongly support including Cystodium within the large polypod clade, and suggest its close relationship to the species-poor grade taxa at the base of the polypod topology (Sphenomeris and Lonchitis, or Saccoloma in this study). Further studies, with an expanded taxon sampling within polypods, are needed to fully understand the more precise phylogenetic relationships of Cystodium.

Citation Download Citation

Petra Korall, David S. Conant, Harald Schneider, Kunihiko Ueda, Harufumi Nishida, and Kathleen M. Pryer "On the Phylogenetic Position of Cystodium: It's Not a Tree Fern – It's a Polypod!," American Fern Journal 96(2), 45-53, (1 April 2006). https://doi.org/10.1640/0002-8444(2006)96[45:OTPPOC]2.0.CO;2

Published: 1 April 2006

KEYWORDS/PHRASES

PUBLICATION TITLE:

COLLECTION:

PUBLICATION YEARS