A phylogeny of the northern temperate leafy liverwort genus Scapania (Scapaniaceae, Jungermanniales) |
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Authors: | Heinrichs Jochen Bombosch Andrea Feldberg Kathrin Kreier Hans-Peter Hentschel Jörn Eckstein Jan Long David Zhu Rui-Liang Schäfer-Verwimp Alfons Schmidt Alexander R Shaw Blanka Shaw A Jonathan Váňa Jiří |
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Institution: | 1. Istituto Zooprofilattico Sperimentale delle Regioni Lazio e Toscana, Via Appia Nuova 1411, 00178 Rome, Italy;2. Dipartimento di Medicina Sperimentale e Chirurgia, Università di Roma Tor Vergata, Via Montpellier 1, 00133 Rome, Italy;3. Fondazione Bioparco, Viale del Giardino Zoologico, 100197 Rome, Italy |
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Abstract: | Scapania is a northern temperate genus with a few disjunctions in the south. Despite receiving considerable attention, the supraspecific classification of this genus remains unsatisfactorily solved. We use three molecular markers (nrITS, cpDNA trnL-F region, atpB-rbcL spacer) and 175 accessions belonging to 50 species (plus eight outgroup taxa) to estimate the phylogeny and to test current classification systems. Our data support the classification of Scapania into six rather than three subgenera, rearrangements within numerous sections, and inclusion of Macrodiplophyllum microdontum. Scapania species with a plicate perianth form three early diverging lineages; the most speciose subgenus, Scapania s.str., represents a derived clade. Most morphological species concepts are supported by the molecular topologies but classification of sect. Curtae requires further study. Southern lineages are nested in northern hemispheric clades. Palearctic-Nearctic distribution ranges are supported for several species. |
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