Ostertagia ostertagi Stiles, 1892 Dataset GBIF Backbone Taxonomy Rank SPECIES Classification kingdom Animalia phylum Nematoda class Chromadorea order Rhabditida family Trichostrongylidae genus Ostertagia species Ostertagia ostertagi Name Homonyms Ostertagia ostertagi (Stiles, 1892) Ransom, 1907 Ostertagia ostertagi Stiles, 1892