Navicula graeffii Grunow Dataset GBIF Backbone Taxonomy Rank SPECIES Classification kingdom Chromista phylum Ochrophyta class Bacillariophyceae order Naviculales family Naviculaceae genus Navicula species Navicula graeffii Name Homonyms Navicula graeffii Grunow ex A.Schmidt, 1875 Navicula graeffii Grunow