Abstract
The taxonomic diversity center of Schistochilopsis is in East Asia, where the genus also shows the highest genetic diversity and morphological plasticity. The integrative survey of Schistochilopsis in East Asia was the main goal of the present account. Plant materials were obtained from recent collections made by authors in various parts of amphi-Pacific Asia; several types of specimens were also studied. The study includes phylogenetic reconstructions from nuclear ITS1,2, chloroplast trnL and trnG sequences, and anatomo-morphological, biogeographical, and taxonomical analyses. As a result, it was concluded that S. obscura should be transferred to Lophozia s. str. and S. grandiretis to the newly described genus Protochilopsis. Lophozia boliviensis was found to be part of the Andean–Sino-Himalayan taxon belonging to Schistochilopsis. The species status of S. hyperarctica and S. opacifolia was not confirmed. Substantial genetic variation is observed within S. incisa with possible cryptic sympatric distributed entities. The taxonomical section of the paper provides a discussion on the status, distinctive morphological traits, distribution, and ecology supplemented with the morphological description for poorly understood taxa. In the vast majority of cases, the illustrations and photographs made from the types and living material are provided.
Highlights
Schistochilopsis is not a speciose genus of hepatics
The new insights into the taxonomy of species currently considered within the genus Schistochilopsis as inferred from the obtained phylogenetic reconstructions and herbarium studies and may have resulted from the following suggestions: 4.1
Schistochilopsis obscura should be transferred to Lophozia s. str. providing the corresponding combination
Summary
Schistochilopsis is not a speciose genus of hepatics. Söderström et al [1] listed seven taxa, includingS. nakanishii (Inoue) Konstant. for which there are serious doubts about its status. Schistochilopsis is not a speciose genus of hepatics. Söderström et al [1] listed seven taxa, including. Two more taxa were added to the genus by Bakalin and Klimova [2]; the formally recognized diversity was confined to nine taxa until present (http://www.catalogueoflife.org/annual-checklist/2019/). Ex Kaal.) Konstant., S. incisa (Schrad.) Konstant., and S. opacifolia Meyl.) Konstant.) have nearly circumpolar distribution occurring from hemiarctic to hemiboreal zones, and far southward in oroboreal belt in the mountains, though with a reported disjunction in. South America for S. incisa [3,4]. Five taxa are known only in East Asia (S. cornuta (Steph.) Konstant., S. nakanishii, S. pacifica Bakalin, S. obscura Bakalin, S. setosa (Mitt.) Konstant.) and one Söderstr.) is a rare taxon of presumable circum-arctic distribution.
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