Workshop no. 14. Systematics and biology of Ostertagia sens.lat. (Nematoda: Trichostrongylidae)

Abstract

The genus Ostertagia, created on the basis of the presence of an accessory bursal membrane by Ransom (1907) and later placed in the family Trichostrongylidae Leiper, 1912, did not require reorganization until its revision by Orloff (1933). Although other related genera were described around this time the systematics of the whole group remained workable.