COMPARATIVE MORPHOLOGICAL CHARACTERISTICS OF NEMATODES OF THE SPECIES
MARSHALLAGIA DENTISPICULARIS AND M. SOGDIANA (NEMATODA: TRICHOSTRONGYLIDAE)
The article presents the results of a comparative morphological analysis of nematodes of the species Marshallagia dentispicularis and M. sogdiana in order to determine the taxonomic position of the species in the system of the genus Marshallagia. The material was collected during dissection of abomasuses of sheep and goats in slaughterhouses in the Bukhara and Tashkent regions, as well as the city of Tashkent. A comparative analysis of the studied individuals of M.dentispicularis and M. sogdiana males found some differences in the shape and structure of the spicule and the dorsal rib. However, the length of the spicules and the dorsal rib, as well as the length and width of the body do not significantly change the range of size variations. Each species is characterized by a rather large genital bursa, there is a rudder, the shape of the lateral plate is conical in M. dentispicularis and bayonet in M. sogdiana. Taking into account some morphological similarities of certain species characteristics that are often found during dissection of animals, it can be assumed that these species are polymorphic forms of one species M. dentispicularis. The expressed doubt requires special molecular and genetic studies of the above species.