[Class] Cestoda - tapeworms see Infraclass Cestoda Order Onchoproteocephalidea Caira, Jensen, Waeschenbach, Olson & Littlewood, 2014 Family Proteocephalidae La Rue, 1911 Subfamily Marsypocephalinae Woodland, 1933 [monotypic] 1 Genus Marsypocephalus Wedl, 1861