Polysiphonia R.K.Greville, 1823 Dataset GBIF Backbone Taxonomy Rank GENUS Classification kingdom Plantae phylum Rhodophyta class Florideophyceae order Ceramiales family Rhodomelaceae genus Polysiphonia Name Homonyms Polysiphonia Hertwig, 1882 Polysiphonia Finks, 1995 Polysiphonia Greville, 1823 Polysiphonia Lendenfeld, 1885 Polysiphonia Pomel, 1872