Hutchinsia arachnoidea C.Agardh, 1827 Dataset GBIF Backbone Taxonomy Rank SPECIES Classification kingdom Plantae phylum Rhodophyta class Florideophyceae order Ceramiales family Rhodomelaceae genus Polysiphonia species Polysiphonia arachnoidea Name Homonyms Hutchinsia arachnoidea C.Agardh, 1827