Comparative morphology of genital cones of Ostertagia from sheep in the United States.
D000818:Animals; D005260:Female; D008297:Male; D012756:Sheep; D012757:Sheep Diseases; D009626:Terminology as Topic; D014251:Trichostrongyloidea / Q000033:anatomy & histology* / Q000145:classification; D014252:Trichostrongyloidiasis / Q000662:veterinary