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Perssoniella and the genera of Schistochilaceae: a new classification based on molecular phylogeniesHe, Xiaolan; Glenny, David
Australian systematic botany, 2010, Volume: 23, Issue: 4Journal Article
The monotypic genus Perssoniella with P. vitreocincta Herzog, endemic to New Caledonia, possesses a series of unique morphological characters and it has been assumed that the genus, assigned to the family Perssoniellaceae and suborder Perssoniellineae, is very isolated but sister to the family Schistochilaceae. The systematic identity of Perssoniella vitreocincta was studied using DNA sequence data for the chloroplast rbcL, rps4 and trnL-F regions. Our analyses placed Perssoniella vitreocincta within the family Schistochilaceae, and within Schistochila itself, with strong support. It suggests that retaining Perssoniella as an independent genus is untenable and we transfer it to the genus Schistochila. Our results indicate that Perssoniella vitreocincta is not an archaic species, as presupposed earlier. The differentiating characters in Perssoniella are mostly probably later derived, rather than ancestral. Our analyses also placed Pachyschistochila and Paraschistochila within Schistochila, again with strong support. We also transfer these two genera to Schistochila.
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