Ophryoglena atra Ehrenberg, 1834 Dataset GBIF Backbone Taxonomy Rank SPECIES Classification kingdom Chromista phylum Ciliophora class Oligohymenophorea order Hymenostomatida family Frontoniidae genus Frontonia species Frontonia atra Name Homonyms Ophryoglena atra Lieb. Ophryoglena atra Ehrenberg, 1834