Gomphonema clavatum Ehrenberg Dataset GBIF Backbone Taxonomy Rank SPECIES Classification kingdom Plantae phylum Bacillariophyta class Bacillariophyceae order Cymbellales family Gomophonemataceae genus Gomphonema species Gomphonema clavatum Name Homonyms Gomphonema clavatum Ehrenberg, 1832 Gomphonema clavatum Agardh