Porothamnium protensum (Renauld & Cardot) Broth. Dataset GBIF Backbone Taxonomy Rank SPECIES Classification kingdom Plantae phylum Bryophyta class Bryopsida order Hypnales family Neckeraceae genus Porotrichum species Porotrichum protensum Name Homonyms Porothamnium protensum (Renauld & Cardot) Broth.