[Class] Cestoda - tapeworms see Infraclass Cestoda
   Order Lecanicephalidea Hyman, 1951
     Family Tetragonocephalidae Yamaguti, 1959 [monotypic]
       Genus Tetragonocephalum Shipley & Hornell, 1905
         01 Tetragonocephalum trygonisᵀ Shipley & Hornell, 1905
         02 Tetragonocephalum kazemii Roohi Aminjan & Malek, 2017
         03 Tetragonocephalum mackenziei Roohi Aminjan & Malek, 2017
         04 Tetragonocephalum passeyi Jensen, 2005
         05 Tetragonocephalum sabae Roohi Aminjan & Malek, 2016
         06 Tetragonocephalum salarii Roohi Aminjan & Malek, 2016
         07 Tetragonocephalum simile (Pintner, 1928)
         08 Tetragonocephalum uarnak (Shipley & Hornell, 1906)
         09 Tetragonocephalum yamagutii Muralidhar, 1988
         10 Tetragonocephalum alii Deshmukh & Shinde, 1979, nom. inq.
         11 Tetragonocephalum aurangabadensis Shinde & Jadhav, 1990, nom. inq.
         12 Tetragonocephalum bhagawatii Shinde, Mohekar & Jadhav, 1985, nom. inq.
         13 Tetragonocephalum madhulatae (Andhare & Shinde, 1994), nom. inq.
         14 Tetragonocephalum madrasensis (Andhare & Shinde, 1994), nom. inq.
         15 Tetragonocephalum raoi Deshmukh & Shinde, 1979, nom. inq.
         16 Tetragonocephalum ratnagiriensis Shinde & Jadhav, 1990, nom. inq.
         17 Tetragonocephalum sephensis Deshmukh & Shinde, 1979, nom. inq.
         18 Tetragonocephalum shipleyi Shinde, Mohekar & Jadhav, 1985, nom. inq.