Gastroclonium clavatum (Roth) Ardiss. Dataset GBIF Backbone Taxonomy Rank SPECIES Classification kingdom Plantae phylum Rhodophyta class Florideophyceae order Rhodymeniales family Champiaceae genus Gastroclonium species Gastroclonium ovatum Name Homonyms Gastroclonium clavatum (Roth) Ardiss.