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Abstract Detail



Pteridology

Nagalingum, Nathalie S. [1], Gardner, Jessica [1], Perrie, Leon [2].

Phylogenetic identification of select lastreopsid ferns (Dryopteridaceae) .

The genus Lastreopsis s.l. (Dryopteridaceae) is paraphyletic with respect to Megalastrum and Rumohra. Recent efforts to address this problem have resulted in segregation of Lastreopsis s.l. into Lastreopsis s.s. and Parapolystichum; furthermore Lastreopsis s.s. has been split into the subgenera Lastreopsis and Rhopalotricha. Notably, as the two genera are morphologically indistinguishable, species can only be assigned to them based on DNA sequence data. The majority of Lastreopsis s.l. species have been assessed using DNA, but there remains nine species that are incertae sedis. We generated sequence data for six of these incertae sedis species to permit placement in either Lastreopsis s.s. or Parapolystichum. We also assessed the phylogenetic position of one species that was assigned to Lastreopsis s.s. in the absence of sequence data, and present new accessions for seven previously studied species. The phylogenetic results indicate that several species require new taxonomic combinations into Parapolystichum. Additionally, the inclusion of new species necessitates reassessment of the subgenera of Lastreopsis. All of the species in this study derived from Australia, New Caledonia, New Zealand and the Pacific, significantly enhancing the understanding of biogeographic patterns across the phylogeny.


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1 - Royal Botanic Garden Sydney, Mrs Macquaries Road, Sydney, NSW, 2000, Australia
2 - Museum of New Zealand Te Papa Tongarewa, Wellington , 6011, New Zealand

Keywords:
none specified

Presentation Type: Oral Paper
Session: 7, Pteridological Section/AFS
Location: 203/Savannah International Trade and Convention Center
Date: Monday, August 1st, 2016
Time: 11:15 AM
Number: 7012
Abstract ID:378
Candidate for Awards:Edgar T. Wherry award


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