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Parapolystichum novoguineense (comb. nov.; Dryopteridaceae) from New Guinea

Michael Sundue, Weston Testo


Recent phylogenetic analyses have recovered Lastreopsis sensu Tindale (1965) as paraphyletic with Coveniella Tindale, Megalastrum Holttum, Rumohra Raddi, and Oenotrichia tripinnata (F. Muell. ex Benth.) Copel. nested within it (Labiak et al. 2014a).  Species of Lastreopsis sensu Tindale were resolved in two clades now recognized as Lastreopsis s.s. and Parapolystichum. Accordingly, Labiak et al. (2014b) made new combinations for Conveniella and Oenotrichia tripinnata in Lastreopsis, and for 27 species of Lastreopsis in Parapolystichum. Lastreopsis s.s. now comprises 16 species, placed into two subgenera, subg. Lastreopsis and subg. Rhopalotricha (Labiak et al. 2015).  Lastreopsis and Parapolystichum cannot always be distinguished from each other morphologically, therefore Labiak et al. (2014) refrained from making combinations for nine species that had not been included in their phylogenetic analysis, treating them as Incertae Sedis.  We address one of those species here, Lastreopsis novoguineensis Holttum, which was described posthumously along with other novelties for the Flora Malesiana (Holttum, 1991). Here, we place Lastreopsis novoguineensis within a phylogenetic framework based on Labiak et al. (2014a) and resolve its taxonomic status based on these findings.


New Guinea, new combination, Pteridophytes

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ISSN 1179-3155 (print); ISSN 1179-3163 (online)

Published by Magnolia Press, Auckland, New Zealand