Ptychostomum Bijlsma, Kruijer & M.Stech Dataset GBIF Backbone Taxonomy Rank GENUS Classification kingdom Plantae phylum Bryophyta class Bryopsida order Bryales family Bryaceae genus Ptychostomum Name Homonyms Ptychostomum Hornsch. Ptychostomum Stein, 1860 Ptychostomum Bijlsma, Kruijer & M.Stech