[Cestodes of the genera Gyrocoelia Fuhrmann, 1899 and Infula Burt, 1939, 1939 (Acoleidae) from the snipes of the Soviet Union].

The data are given on the morphology of cestodes of the genera Gyrocoelia Fuhrm,. 1899 and Infula Burt, 1939. It has been found that in the spermatheca of the female of G. perversa there are spermatozoids with an elongated head typical for Plathelminthes. In the spermatheca of the female of I. burhini were found spermatids with long tails. The final formation of spermatozoids in I. burhini takes place in the spermatheca. The taxonomic position of the species of Gyrocoelia found in the waters of the USSR has been made more precise: G. polytestis Saakowa, 1952 and Gyrocoelia sp. II Schaldibin, 1960-1961 are reduced to synonyms of Infula burhini and Gyrocoelia sp. I Schaldibin, 1960-1961 to a synonym of G. perversa. The number and size of the hooks of proboscis in the species of the genus Gyrocoelia vary in wide ranges and cannot be used as a taxonomic character. The number of testes and the structure of the egg membrane are constant for the species of this genus.