Achnanthidium coarctatum Brébisson Dataset GBIF Backbone Taxonomy Rank SPECIES Classification kingdom Chromista phylum Ochrophyta class Bacillariophyceae order Achnanthales family Achnanthaceae genus Achnanthes species Achnanthes coarctata Name Homonyms Achnanthidium coarctatum Brébisson ex W.Smith, 1855 Achnanthidium coarctatum Brébisson