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Issue: Vol. 50 No. 1: 30 Dec. 2025
Type: Article
Published: 2025-12-30
DOI: 10.11646/bde.50.1.9
Page range: 50-71
Abstract views: 21
PDF downloaded: 2

A taxonomic study of Pylaisiadelpha (Sematophyllaceae, Bryophyta)

State Key Laboratory of Plant Diversity and Specialty Crops, Institute of Botany, Chinese Academy of Sciences, Beijing, 100093, China, State Key Laboratory of Systematic and Evolutionary Botany, Institute of Botany, Chinese Academy of Sciences, Beijing, 100093, China
Medical Plant Exploitation & Utilization Engineering Research Center, Sanming University, Sanming 365004, China; Fujian Provincial Key Laboratory of Resources and Environment Monitoring & Sustainable Management and Utilization, Sanming University, Sanming 365004, China
Bryophytes Brotherella Sematophyllum Isopterygium mosses taxonomy

Abstract

The eight species currently attributed to Pylaisiadelpha are revised. Four species are recognized: P. capillacea (reported here new to China), P. duellii, P. tenuirostris and P. tristoviridis (reported here new to U.S.A.). Pylaisiadelpha brasiliensis is transferred to Sematophyllum, as S. prolongirostratum Y.Jia nom. nov.; P. drepanioides, P. yokohamae and P. sharpii are treated as new synonyms of P. tenuirostris and Isopterygium tenerum, respectively. The illustrations and detailed descriptions mainly based on the type specimens are provided. A key to the four species and a list of status of all name placed in Pylaisiadelpha are also presented. Clastobryum cupressinoides is excluded from synonymy of Pylaisiadelpha capillacea and consider as a new synonym of Brotherella henonii.

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