Ignatov, M.S. Yu.S. Ishchenko & O.I. Kuznetsova. 2022. New data on the genus Oxyrrhynchium (Brachytheciaceae, Bryophyta) in the Russian Far East

Arctoa (2022) 31: 128–136

doi: 10.15298/arctoa.31.14

The genus Oxyrrhynchium was known in the Russian Far East as represented by a single species, O. savatieri, revealed recently in the Kuril Islands. The finding of O. vagans, a much more southern species, in Primorsky Territory was unexpected. When sporophytes are present, this species is easily differentiated from most other species of the genus by smooth, not rough setae. However, specimens with sporophytes are rare in Oxyrrhynchium and without sporophytes their identification often cannot be certain. Thus we sequenced nrITS of other collections from the Russian Far East and China that lack sporophytes. One another specimen of O. vagans has been found among them, from the Kuril Islands. Oxyrrhynchium savatieri is found in a sister position to the group of species with strong costa, previously segregated into the genus Donrichardsia. No one of Chinese specimens identified as O. hians was found in the clade with O. hians samples from North America and Europe.