Antithamnion cruciatum var. radicans Dataset GBIF Backbone Taxonomy Rank VARIETY Classification kingdom Plantae phylum Rhodophyta class Florideophyceae order Ceramiales family Ceramiaceae genus Antithamnion species Antithamnion cruciatum Name Homonyms Antithamnion cruciatum f. radicans (J.Agardh) Hauck, 1882 Antithamnion cruciatum var. radicans