Hemitrema fragilis (Harvey) E.Y.Dawson, 1957 Dataset GBIF Backbone Taxonomy Rank SPECIES Classification kingdom Plantae phylum Rhodophyta class Florideophyceae order Ceramiales family Delesseriaceae genus Martensia species Martensia fragilis Name Homonyms Hemitrema fragilis (Harvey) E.Y.Dawson, 1957