Frontonia atra (Ehrenberg, 1834) Bütschli, 1889 Dataset GBIF Backbone Taxonomy Rank SPECIES Classification kingdom Chromista phylum Ciliophora class Oligohymenophorea order Hymenostomatida family Frontoniidae genus Frontonia species Frontonia atra Name Synonyms Ophryoglena atra Ehrenberg, 1834 Homonyms Frontonia atra (Ehrenberg, 1834) Bütschli, 1889 Frontonia atra Ehrenberg, 1833