Butlerius spirifer (Skwarra, 1921) Zullini & Loof, 1980 Dataset GBIF Backbone Taxonomy Rank SPECIES Classification kingdom Animalia phylum Nematoda class Chromadorea order Rhabditida family Diplogastridae genus Butlerius species Butlerius spirifer Name Synonyms Diplogaster spirifera Skwarra, 1921 Fictor spirifer (Skwarra, 1921) Paramonov, 1952 Paroigolaimella spirifera (Skwarra, 1921) Andrássy, 1958 Homonyms Butlerius spirifer (Skwarra, 1921) Zullini & Loof, 1980