Biogeography and integrative taxonomy of Epipterygium (Mniaceae, Bryophyta)

A significant number of bryophyte species are thought to have transcontinental geographic ranges, often with multiple disjunct distribution areas. One of these cases is Epipterygium tozeri (Mniaceae), with a Holarctic distribution and disjunct ranges in western North America, the Mediterranean, Japan and central Asia. Collections from different geographic regions were lumped into E. tozeri based on morphology, but a molecular confirmation was lacking so far. Here, we tested species concepts in the genus Epipterygium, with a special focus on the E. tozeri species complex, combining morphological and DNA sequence data for the nuclear ribosomal ITS region and two plastid loci (trnG intron, trnT‐psbD spacer). In a second step, we reconstructed the historical biogeography of the genus. We found that Epipterygium most likely originated in Asia or North/Central America and that the alleged single widespread species E. tozeri with disjunct ranges is in fact a group of genetically and morphologically distinct taxa, including four overlooked species, for which we provide descriptions: E. atlanticum sp. nov., E. biauritum sp. nov., E. oreophilum sp. nov., and E. yunnanense sp. nov. The biogeographical history of these species is best explained by a step‐wise parallel colonization of the Eurasian and American continents followed by in‐situ speciation.

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Bibliographic Details
Main Authors: Hanusch, Maximilian, Ortiz, Edgardo M., Patiño, Jairo, Schaefer, Hanno
Other Authors: Ministerio de Asuntos Económicos y Transformación Digital (España)
Format: artículo biblioteca
Language:English
Published: John Wiley & Sons 2020-09-26
Subjects:Bryophytes, Cryptic species, Disjunctions, Macaronesia, Mediterranean,
Online Access:http://hdl.handle.net/10261/224343
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