Biddulphia rhombus subsp. rhombus Dataset GBIF Backbone Taxonomy Rank SUBSPECIES Classification kingdom Chromista phylum Ochrophyta class Bacillariophyceae order Biddulphiales family Biddulphiaceae genus Biddulphia species Biddulphia rhombus Name Homonyms Biddulphia rhombus var. rhombus Biddulphia rhombus subsp. rhombus Biddulphia rhombus f. rhombus