[Class] Cestoda - tapeworms see Infraclass Cestoda Order Diphyllobothriidea Kuchta, Scholz, Brabec & Bray, 2008 Family Diphyllobothriidae Lühe, 1910 Genus Tetragonoporus Skrjabin, 1961 [monotypic] 1 Tetragonoporus calyptocephalusᵀ Skrjabin, 1961