Pylaisiadelphaceae is a family of mosses in the order Hypnales described in 2004 by Bernard Goffinet and William R. Buck. They gave Pylaisiadelpha as the type genus, though it is not always included in the family today.
It was subsequently included in part 4 of Bruce Allen's Moss Flora of Central America, published in 2018.
Classification This list of included genera is an amalgamation of World Flora Online, Tropicos and the Bryophyte Nomenclator. Aptychella Aptychellites Bonnosukea Brotherella Clastobryellina Clastobryopsis Clastobryum Gammiella Hageniella Heterophyllium Isocladiella Isocladiellopsis Isopterygium Mastopoma Microgammiella Notohypnum Orientobryum Platygyrium Pseudotrismegistia Pterogonidium Pylaisiadelpha Rovnohypnum Taxitheliella Taxithelium Trachyphyllum Trismegistia Trochophyllohypnum Wijkia Yakushimabryum
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