Hymenostyliella llanosii (Müll.Hal.) H.Rob. (Pottiaceae, Bryophyta) New to Myanmar and Its Phylogenetic Position

抄録

Hymenostyliella llanosii (Müll.Hal.) H.Rob. known from India, Thailand, the Philippines, and Papua New Guinea is newly reported from Myanmar. Based on the Myanmar material, a detailed morphological description, illustrations and ecological information are provided. The species is characterized by the long-lanceolate leaves with involute and distantly dentate leaf margins, adaxially bulging-mammillose and trigonous upper laminal cells. Diphyscium calcareum Dixon is proposed as a synonym of H. llanosii. The phylogenetic position of H. llanosii is inferred based on the Myanmar plants by the nuclear ITS sequences, and it was resolved in the clade corresponding to the tribe Pleuroweisieae, supporting morphological affinity to several genera of this tribe.