Polysiphonia parasitica (Hudson) Greville Dataset GBIF Backbone Taxonomy Rank SPECIES Classification kingdom Plantae phylum Rhodophyta class Florideophyceae order Ceramiales family Rhodomelaceae genus Deltalsia species Deltalsia parasitica Name Homonyms Polysiphonia parasitica (Hudson) Areschoug Polysiphonia parasitica (Hudson) Greville