Sporolithon durum (Foslie) R.A.Towns. & Woelk. Dataset GBIF Backbone Taxonomy Rank SPECIES Classification kingdom Plantae phylum Rhodophyta class Florideophyceae order Corallinales family Sporolithaceae genus Sporolithon species Sporolithon durum Name Synonyms Archaeolithothamnion durum Foslie Homonyms Sporolithon durum (Foslie) R.A.Towns. & Woelk.