Spirostomum ambiguum Kahl, 1932 Dataset GBIF Backbone Taxonomy Rank SPECIES Classification kingdom Chromista phylum Ciliophora class Heterotrichea order Heterotrichida family Spirostomidae genus Spirostomum species Spirostomum inflatum Name Homonyms Spirostomum ambiguum (Müller, 1786) Ehrenberg, 1834 Spirostomum ambiguum Kahl, 1932 Spirostomum ambiguum Roux