Achnanthidium trinodis Arnott Dataset GBIF Backbone Taxonomy Rank SPECIES Classification kingdom Chromista phylum Ochrophyta class Bacillariophyceae order Achnanthales family Achnanthidiaceae genus Achnanthidium species Achnanthidium trinode Name Homonyms Achnanthidium trinodis Arnott ex Ralfs Achnanthidium trinodis Arnott