A revision of the genus Tomentypnum (Amblystegiaceae) in northern Eurasiaстатья
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Дата последнего поиска статьи во внешних источниках: 16 декабря 2020 г.
Аннотация:A combined molecular phylogenetic and morphological analysis revealed four species in thegenus Tomentypnum. In addition to the commonly accepted widespread T. nitens and North American T.falcifolium, a strong genetic isolation is shown for two taxa. Tomentypnum involutum is elevated fromvariety to species status; it is widely distributed in permafrost areas in Siberia, the islands of the ArcticOcean, high mountains in Scandinavia, and is known from the Rocky Mountains of Canada and fromGreenland. Tomentypnum vittii is described as a new species for eastern Asia and Siberia, in China andRussia previously referred to T. falcifolium. Descriptions, illustrations, a key for identification, and a mapfor the Eurasian distributions are provided. Tomentypnum nitens is represented by four groups ofhaplotypes, which lack morphological distinction, and are therefore referred to one species. However, thedistributions of the haplotype groups are revealing; some are more confined to mires rich in relic speciescomposition, whereas others are more widely distributed and partly seem to occur in recently recolonizedsites. Different distribution patterns in densely sampled Sweden suggest different glacial and postglacialhistories.