Redescription of Diporotaenia colymbi Spasskaya, Spassky et Borgarenko, 1971 [Cestoda, Cyclophyllidea, Schistotaeniidae] and amended diagnoses of Diporotaenia Spasskaya, Spassky et Borgarenko, 1971 and Diporotaeniinae Ryzhikov et Tolkacheva, 1975

Diporotaenia colymbi Spasskaya, Spassky et Borgarenko, 1971 (Cestoda, Cyclophyllidea, Schistotaeniidae) is redescribed from Tachybaptus ruficollis (L.) in Turkmenistan. An amended generic diagnosis of Diporotaenia Spasskaya, Spassky et Borgarenko, 1971 is proposed. The taxonomy of Schistotaeniidae Johri, 1959 and the generic composition of its subfamilies, Schistotaeniinae Johri, 1959 and Diporotaeniinae Ryzhikov et Tolkacheva, 1975, are discussed. The genera Ryjikovilepis Gulyaev et Tolkacheva, 1987, Isezhia Gulyaev et Konyaev, 2004, Mircia Konyaev et Gulyaev, 2006 and Decarabia Konyaev et Gulyaev, 2005 are considered as members of the subfamily Diporotaeniinae. An amended diagnosis of the latter subfamily is proposed.