Navicula rhynchocephala var. amphiceros Kutz. Dataset GBIF Backbone Taxonomy Rank VARIETY Classification kingdom Chromista phylum Ochrophyta class Bacillariophyceae order Naviculales family Naviculaceae genus Navicula species Navicula rhynchotella Name Homonyms Navicula rhynchocephala var. amphiceros (Kützing) Grunow Navicula rhynchocephala var. amphiceros Kutz.