[Class] Cestoda - tapeworms see Infraclass Cestoda
   Order Onchoproteocephalidea Caira, Jensen, Waeschenbach, Olson & Littlewood, 2014
     Family Proteocephalidae La Rue, 1911
       Subfamily Corallobothriinae Freze, 1965 [non-monophyletic]
         Genus Megathylacoides Jones, Kerley & Sneed, 1954
           1 Megathylacoides giganteumᵀ (Essex, 1928)
           2 Megathylacoides intermedium (Fritts, 1959)
           3 Megathylacoides lamothei (García-Prieto, 1990)
           4 Megathylacoides procerum (Sneed, 1950)
           5 Megathylacoides thompsoni (Sneed, 1950)
           6 Megathylacoides tva (Jones, Kerley & Sneed, 1956)