Avian Haematozoa: Some Taxonomic and Nomenclatural Problems Arising from the Russian Literature*

Abstract
It is evident from a survey of the Russian literature that many species of avian haematozoa recorded do not meet the basic criteria required by the International Code of Zoological Nomenclature. Thus 28 spp. of Haemoproteus and 4 spp. of Leucocytozoon are considered to be nomina nuda, while 1 sp., L. turtur orientalis is a synonym of L. marchouxi.