广西植物2026，Vol.46Issue(2)：281-290,10.DOI:10.11931/guihaia.gxzw202502025
中国藓类植物新记录种——钝叶匍网藓
A moss species newly recorded for China:Mitthyridium obtusifolium
摘要
Abstract
Hainan Tropical Rainforest National Park is one of the first five national parks established in China,where comprehensive biodiversity surveys are essential foundations for the construction of the park.The present study investigated the Limushan area for bryophyte diversity through systematic field survey and voucher collection.The results were as follows:(1)Detailed morphological examination of the specimens with consultation with relevant literature revealed one moss species as a new record for China-Mitthyridium obtusifolium(Lindb.)H.Rob.The main distinguishing features of the species include creeping main stems with erect branches;leaves broadly lanceolate,slightly rugose with a rounded-obtuse apex;and leaf sheaths slightly broadened and differentiated borders extending from the leaf base to near the apex.(2)Detailed morphological descriptions and color plates of the species were provided based on the newly collected specimens.A global distribution map of M.obtusifolium was given,showing that this species is primarily found in tropical regions,particularly on islands in the Indian and Pacific Oceans and along adjacent continental coastlines.It typically inhabits tree trunks and decaying wood at elevations below 500 m.The newly recorded occurrence in China represents the northernmost known distribution for this species globally.A classification key was developed to distinguish the three known Mitthyridium species in China:M.fasciculatum(Hook.& Grev.)H.Rob.,M.obtusifolium,and M.flavum(Müll.Hal.)H.Rob.(3)A literature review revealed that the taxonomy of Mitthyridium was both complex and challenging.The phylogenetic relationships between Mitthyridium and the related Syrropodon Schwägr.as well as between M.obtusifolium and its related M.fasciculatum,were discussed.Mitthyridium is a mainly tropical lowland distribution genus,thus functioning as an important indicator for conservation and ecological restoration in lowland rainforest habitats.The discovery of new record not only enriches the floristic data of tropical bryophytes in Hainan and even China,but also contributes new scientific insights into the taxonomy,identification,and conservation of the genus Mitthyridium.关键词
海南热带雨林国家公园/黎母山/花叶藓科/新分布/热带岛屿Key words
Hainan Tropical Rainforest National Park/Limushan/Calymperaceae/new distribution/tropical islands分类
农业科技引用本文复制引用
高洁,韦玉梅,李敏,何文钏,郝杰威,张莉娜..中国藓类植物新记录种——钝叶匍网藓[J].广西植物,2026,46(2):281-290,10.基金项目
国家自然科学基金(32160315,32360056,31760054) （32160315,32360056,31760054）
海南大学科研启动项目(KYQD(ZR)-22105). （KYQD(ZR）
