After Nelson, 1994, with Recent species from Froese & Pauly, 2001 [“The Fishbase”]

<==o Ophichthus Eoc. Eu. R. Oc. ()? [55]
   |-- O. altipennis (Kaup, 1856)
   |-- O. apachus McCosker & Rosenblatt, 1998
   |-- O. apicalis (Anonymous [Bennett], 1830) (Bluntnose snake-eel)
   |-- O. arneutes McCosker & Rosenblatt, 1998
   |-- O. asakusae Jordan & Snyder, 1901
   |-- O. bonaparti (Kaup, 1856) (Napoleon snake eel)
   |-- O. brasiliensis (Kaup, 1856)
   |-- O. celebicus (Bleeker, 1856)
   |-- O. cephalozona (Bleeker, 1864) (Dark-shouldered snake eel)
   |-- O. cruentifer (Goode & Bean, 1896) (Margined snake eel)
   |-- O. cylindroideus (Ranzani, 1840) (Dusky snake eel)
   |-- O. echeloides (D'Ancona, 1928)
   |-- O. episcopus (Castelnau, 1878)
   |-- O. erabo (Jordan & Snyder, 1901) (Fowler's snake eel)
   |-- O. evermanni Jordan & Richardson, 1909
   |-- O. exourus McCosker, 1999
   |-- O. frontalis (Garman, 1899) (Death-banded snake-eel)
   |-- O. garretti (Günther, 1910)
   |-- O. genie McCosker, 1999
   |-- O. gomesii (Castelnau, 1855) (Shrimp eel)
   |-- O. grandoculis (Cantor, 1849)
   |-- O. hyposagmatus McCosker & Böhlke, 1984
   |-- O. karreri Blache, 1975
   |-- O. kunaloa McCosker, 1979
   |-- O. leonensis Blache, 1975
   |-- O. longipenis McCosker & Rosenblatt, 1998
   |-- O. macrochir (Bleeker, 1853)
   |-- O. manilensis Herre, 1923
   |-- O. marginatus (Peters, 1855) (Shorthead snake-eel)
   |-- O. mecopterus McCosker & Rosenblatt, 1998
   |-- O. megalops Asano, 1987
   |-- O. melanochir (Bleeker, 1865)
   |-- O. melanoporus Kanazawa, 1963 (Blackpored eel)
   |-- O. melope McCosker & Rosenblatt, 1998
   |-- O. menezesi McCosker & Böhlke, 1984
   |-- O. mystacinus McCosker, 1999
   |-- O. omorgmus McCosker & Böhlke, 1984
   |-- O. ophis (Linnaeus, 1758) (Spotted snake eel)
   |-- O. polyophthalmus (Bleeker, 1865) (Many-eyed snake-eel)
   |-- O. puncticeps (Kaup, 1860) (Palespotted eel)
   |-- O. regius (Richardson, 1848) (Ornate Snake Eel)
   |-- O. remiger (Valenciennes, 1842) (Punctuated snake-eel)
   |-- O. rex Böhlke & Caruso, 1980 (King snake eel)
   |-- O. rufus (Rafinesque, 1810) (Rufus snake eel)
   |-- O. rugifer Jordan & Bollman, 1890
   |-- O. rutidoderma (Bleeker, 1853)
   |-- O. rutidodermatoides (Bleeker, 1853)
   |-- O. serpentinus (Seale, 1917)
   |-- O. spinicauda (Norman, 1922) (Antillean snake eel)
   |-- O. tetratrema McCosker & Rosenblatt, 1998
   |-- O. triserialis (Kaup, 1856) (Pacific snake-eel)
   |-- O. tsuchidae Jordan & Snyder, 1901
   |-- O. unicolor (Regan, 1908) (Plain snake-eel)
   |-- O. urolophus (Temminck & Schlegel, 1846)
   `-- O. zophochir (Jordan & Gilbert, 1882) (Yellow snake-eel)

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