ABSTRACT
Nematodes of the Anguina group were known in the eighteenth century. In the past, the wheat nematode Anguina tritici caused significant economic losses in many countries. Few changes have been made in the taxonomy of anguinid nematodes for a long period, since Brzeski, Chizhov and Subbotin, Siddiqi, and Fortuner and Maggenti proposed their original revisions of the group. Distribution: Formerly widespread in wheat-growing areas of Asia, Australia, Europe, North Africa, and North America. Chizhov demonstrated that the bent grass nematode from Agrostis tenuis. However, in the revision the same author considered Anguina agrostis to be a complex species of a very high morphological variability depending on host range. Winter wheat and rye are infested early in spring, but some invasive juveniles may penetrate the plant in autumn. In July and August, severely infested wheat and rye plants may be observed in the field but they never contain any developmental stages of the nematode.
