A new evaluation of the genus Trichostomopsis (Pottiaceae, Bryophyta)

Abstract

New taxonomic data are provided for the genus Didymodon, after a revision of the species treated as Trichostomopsis. Only two species are now recognized: D. australasiae and D. umbrosus. Trichostomopsis curvipes and T. trivialis recognized by previous authors are reduced to synonyms of D. umbrosus, while Trichostomopsis haussknechtii is synonymized with D. australasiae. Other taxa studied, such as Barbula bistrata, B. incrassata, B. linguaecuspis, Tortula cabulica, T. cucullifolia and T. geniculata, have been synonymized with D. australasiae. Didymodon torquescens is proposed as a synonym of D. revolutus. Lectotypes for Barbula ecuadoriensis, B. haussknechtii, B. incrassata, B. linguaecuspis, B. nanocaulis, B. poeppigiana, B. rufiseta, B. trichostomacea, B. trivialis, Didymodon patentifolius, D. subtophaceus, Tortula geniculata, Trichostomopsis crispifolia, and Trichostomum fuscescens are proposed. Morphological descriptions, distribution data, illustrations, LM and SEM photographs of the species recognized are included. © 2005 The Linnean Society of London, Botanical Journal of the Linnean Society, 2005, 147, 117–127.