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Issue: Vol. 768 No. 3: 4 Aug. 2026
Type: Article
Published: 2026-08-04
DOI: 10.11646/phytotaxa.768.3.3
Page range: 143-163
Abstract views: 48
PDF downloaded: 2

A taxonomic revision of the genus Chionostomum (Sematophyllaceae s.l., Bryopsida)

State Key Laboratory of Plant Diversity and Specialty Crops; Institute of Botany; Chinese Academy of Sciences; Beijing 100093; China; China National Botanical Garden; Beijing 100093; China; University of Chinese Academy of Sciences; Beijing 100049; China
Singapore Botanic Gardens; National Parks Board; 1 Cluny Road; Singapore 259569; Republic of Singapore; Department of Biological Sciences; National University of Singapore; 14 Science Drive 4; Singapore 117543; Republic of Singapore
Museum of Nature and Human Activities; Hyogo; Yayoigaoka-6; Sandashi; Hyogo 669–1546; Japan
Herbarium; Key Laboratory for Plant Diversity and Biogeography of East Asia; Kunming Institute of Botany; Chinese Academy of Sciences; Kunming; Yunnan 650201; China
Hattori Botanical Laboratory; Obi 6-1-26; Nichinan; Miyazaki 889-2535; Japan
School of Resources and Chemical Engineering; Sanming University; Sanming 365004; China
State Key Laboratory of Plant Diversity and Specialty Crops; Institute of Botany; Chinese Academy of Sciences; Beijing 100093; China; China National Botanical Garden; Beijing 100093; China
State Key Laboratory of Plant Diversity and Specialty Crops; Institute of Botany; Chinese Academy of Sciences; Beijing 100093; China; China National Botanical Garden; Beijing 100093; China
Bryophytes Asia Hypnales morphology new distribution new synonym pleurocarpous mosses

Abstract

The genus Chionostomum is revised, with two species accepted: C. hainanense and C. rostratum. Chionostomum baolocense is proposed as a new synonym of C. rostratum. Chionostomum pinicola is provisionally excluded from Chionostomum due to its distinct morphological characteristics, and its generic placement remains uncertain. No collector, collection number, or identifiable holotype is recorded in the protologue of Neckera rostrata (≡ Chionostomum rostratum); we thus designate BM001223377 (BM), which is consistent with the original locality and description, as its lectotype. A key, illustrations and diagnostic features for the recognized species are provided. The distribution ranges of the accepted species are refined, with Chionostomum rostratum reported as a new record for Indonesia and Nepal. Previous records of Chionostomum hainanense and C. pinicola from Thailand, C. rostratum from Malaysia are excluded due to misidentifications.

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How to Cite

Luo, L., Ho, B.-C., Akiyama, H., Ma, W.-Z., Zheng, T.-X., Han, W., Wang, Q.-H. & Jia, Y. (2026) A taxonomic revision of the genus Chionostomum (Sematophyllaceae s.l., Bryopsida). Phytotaxa 768 (3): 143–163. https://doi.org/10.11646/phytotaxa.768.3.3