Journal Article10.1600/036364414X678152
A Revisitation of Species Circumscriptions and Evolutionary Relationships in Scouleria (Scouleriaceae)
TL;DR: Phylogenetic patterns within S. aquatica sensu lato support the resurrection of two northeast Asian species, S. marginata and S. patagonica, and provide support for the placement of Tridontium outside of Scouleriaceae.
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Abstract: The genus Scouleria has three to five traditionally recognized species from Northeast Asia, western North America, and southern South America. While the genus is well defined by several morphological synapomorphies, species circumscriptions have varied, especially with respect to narrow versus broad concepts of S. aquatica. We used Maximum Likelihood and Bayesian phylogenetic analyses of ITS and the chloroplast loci ndhA, trnS-trnG, and rpL32-trnL to test species circumscriptions and to re-evaluate an earlier hypothesis of evolutionary relationships within the genus. Our results strongly support the recognition of S. marginata and S. patagonica as currently recognized based on geography and morphology. Phylogenetic patterns within S. aquatica sensu lato support the resurrection of two northeast Asian species, S. rschewinii and S. pulcherrima as distinct from North American S. aquatica sensu stricto. In addition, the recognition of the North American S. “species A” sensu Norris and Shevock (2004) ...
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Citations
A multilocus phylogeny of the moss genus Didymodon and allied genera (Pottiaceae): Generic delimitations and their implications for systematics
TL;DR: Preliminary phylogenetic analyses of DNA sequences for three plastid markers and one nuclear locus indicate that Didymodon s.l. is not monophyletic, because Andinella, Gertrudiella and Tridontium species are nested within it.
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Krassiloviella limbelloides gen. et sp. nov.: Additional Diversity in the Hypnanaean Moss Family Tricostaceae (Valanginian, Vancouver Island, British Columbia)
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The genus Scouleria (Bryophyta) in Russia revisited
Elena A. Ignatova,Lyubov E. Kurbatova,Oxana I. Kuznetsova,Oleg V. Ivanov,James R. Shevock,Benjamin E. Carter,Michael S. Ignatov +6 more
TL;DR: Circumscription of Scouleria species in Russia is revised basing on the molecular phylogenetic analysis and morphological study and DNA sequence data and additional morphological characters appear to be fairly stable.
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