title: Hybridization of two species of nematodes parasitic in ruminants, Cooperia oncophora (Railliet, 1898) Ransom, 1907, and Cooperia pectinata Ransom, 1907.
mesh_terms: D000818:Animals; D002417:Cattle; D002418:Cattle Diseases; D006824:Hybridization, Genetic; D007814:Larva / Q000254:growth & development; D008675:Metamorphosis, Biological; D014251:Trichostrongyloidea / Q000033:anatomy & histology / Q000145:classification* / Q000254:growth & development; D014252:Trichostrongyloidiasis / Q000662:veterinary*