After Carroll, 1988, Nelson, 1994, and Mould, 1995-1997

<==o Torpedo Houttuyn, 1764 [Narcobatus] ?Eoc. Eu. R. Oc. [Torpedininae] [13]
   |--o (Tetronarce) Gill, 1862
   |  |-- T. (T.) nobiliana Bonaparte, 1835
   |  |-- T. (T.) californica Ayres, 1855
   |  |-- T. (T.) fairchildi Hutton, 1872
   |  |-- T. (T.) tokionis (Tanaka, 1908)
   |  |-- T. (T.) puelcha Lahille, 1928
   |  |-- T. (T.) macneilli (Whitley, 1932)
   |  |-- T. (T.) tremens De Buen, 1959
   |  |-- T. (T.) peruana Chirichigno, 1963
   |  |-- T. (T.) microdiscus Parin & Kotlyar, 1985
   |  |-- T. (T.) semipelagica Parin & Kotlyar, 1985
   |  |-- T. (T.) sp.1 [Last & Stevens, 1993] [E Australia]
   |  |-- T. (T.) sp.2 [Compagno & Smale] [Mozambique]
   |  |-- T. (T.) sp.3 [Compagno] [Hawaii]
   `--o (Torpedo) Houttuyn, 1764
      |-- T. (T.) torpedo (Linnaeus, 1758)
      |-- T. (T.) marmorata Risso, 1810
      |-- T. (T.) sinuspersici Olfers, 1831
      |-- T. (T.) panthera Olfers, 1831
      |-- T. (T.) fuscomaculata Peters, 1855
      |-- T. (T.) polleni (Bleeker, 1865)
      |-- T. (T.) suessi Steindachner, 1898)
      |-- T. (T.) zugmayeri (Engelhardt, 1912)
      |-- T. (T.) mackayana Metzelaar, 1919
      |-- T. (T.) andersoni Bullis, 1962
      |-- T. (T.) bauchotae Cadenat, 1978
      |-- T. (T.) alexandriensis Mazhar, 1982
      |-- T. (T.) sp.1 [Compagno & Smale] [Comoro]
      |-- T. (T.) sp.2 [Compagno & Smale] [Mautitius]
      |-- T. (T.) sp.3 [Compagno & Smale] [Seychelles]
      `-- T. (T.) sp.4 [Compagno & Smale] [Kenya]

Reference(s):