Uronema nigricans (Müller, 1786) Florentin, 1901 Dataset GBIF Backbone Taxonomy Rank SPECIES Classification kingdom Chromista phylum Ciliophora class Oligohymenophorea order Hymenostomatida family Uronematidae genus Uronema species Uronema nigricans Name Homonyms Uronema nigricans (Müller, 1786) Florentin, 1901