2025/01/12 by Vladimir E. Fedosov, Vladimir Fedosov, Alina V. Fedorova +5
Agricultural and Biological Sciences · #Bryophyte Studies and Records #Lichen and fungal ecology #Botany and Plant Ecology Studies
paper · doi:10.1002/tax.13298
Abstract We revised the Holarctic taxa of Ditrichaceae on the basis of both organellar DNA sequence data and morphological traits. After the removal of phylogenetically discordant elements related to Flexitrichum and Rhamphidium , the remaining representatives of the family cluster into three well‐supported lineages, which are recognized here as the reinstated family Ceratodontaceae and a more restricted Ditrichaceae with two subfamilies. Rhamphidium is segregated into a newly described family, Rhamphidiaceae; Aongstroemia gayana , Dicranella vaginata and Symblepharis krausei are combined under Rhamphidium , and the genus Strombulidens is tentatively moved to Rhamphidiaceae. Ceratodontaceae includes the genera Ceratodon , Cheilothela , Trichodon , and a newly described Pseudaongstroemia , which includes a single species, known earlier as Aongstroemia fuji‐alpina . The genus Trichodon is paraphyletically defined to include T. cylindricus , T. oblongus reinstated at specific rank, and a molecularly distinct lineage, which we were unable to distinguish morphologically from T. cylindricus . The monoicous genera of Ditrichaceae and the autoicous taxa of Ditrichum as previously understood are merged into a single genus, Pleuridium , which is segregated to Ditrichaceae subfam. Pleuridioideae stat. nov. A single genus is also accepted within Ditrichaceae subfam. Ditrichoideae, following the transfer of both Aongstroemia julacea s.str. and A. orientalis to Ditrichum . Ditrichum septentrionale is newly described based on material mostly from North Asia. Two ecologically specialized, putatively only locally distributed taxa are synonymized with more widespread taxa. Ditrichum plumbicola is placed into synonymy with D. lineare and similarly D. cornubicum is tentatively synonymized with D. macrorhynchum . The morphological delimitations of D. lineare , D. pusillum and D. macrorhynchum are clarified and emended.