Three new species of the genus Tylenchorhynchus Cobb, 1913 (Tylenchidae: Nematoda) from Canada

Three new species of the genus Tylenchorhynchus Cobb, 1913 from Canada are named and described. Tylenchorhynchus irregularis n. sp. differs from all closely related species in the irregular width of the cuticular annulation, especially in the posterior half of the body. T. longus n. sp. is similar to T. superbus Allen, 1955 but differs from this species in relative tail length and annulation of the tail terminus. T. laminatus n. sp. resembles T. leptus Allen, 1955 but differs in the details of the lip region, spear length, and laminated annules.