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

<==o Ophichthyinae (snake eels; käärmeankeriaat) [41/210]
   |--o Apterichthys [Verma] ()? [12]
   |  |-- A. anguiformis (Peters, 1877) (Slender finless eel)
   |  |-- A. ansp (Böhlke, 1968) (Academy eel)
   |  |-- A. caecus (Linnaeus, 1758) (European finless eel)
   |  |-- A. equatorialis (Myers & Wade, 1941) (Finless eel)
   |  |-- A. flavicaudus (Snyder, 1904)
   |  |-- A. gracilis (Kaup, 1856)
   |  |-- A. kendalli (Gilbert, 1891) (Western Atlantic finless eel)
   |  |-- A. keramanus Machida, Hashimoto & Yamakawa, 1997
   |  |-- A. klazingai (Weber, 1913) (Sharpsnout snake eel)
   |  |-- A. monodi (Roux, 1966)
   |  |-- A. moseri (Jordan & Snyder, 1901)
   |  `-- A. orientalis Machida & Ohta, 1994
   |--o Bascanichthys ()? [16]
   |  |-- B. bascanium (Jordan, 1884) (Sooty eel)
   |  |-- B. bascanoides Osburn & Nichols, 1916 (Sooty sand-eel)
   |  |-- B. ceciliae Blache & Cadenat, 1971
   |  |-- B. congoensis Blache & Cadenat, 1971
   |  |-- B. cylindricus Meek & Hildebrand, 1923 (Round sand-eel)
   |  |-- B. deraniyagalai Menon, 1961 (Indian longtailed sand-eel)
   |  |-- B. fijiensis (Seale, 1935)
   |  |-- B. filaria (Günther, 1872)
   |  |-- B. inopinatus McCosker, Böhlke & Böhlke, 1989
   |  |-- B. kirkii (Günther, 1870) (Longtailed sand-eel)
   |  |-- B. longipinnis (Kner & Steindachner, 1867)
   |  |-- B. myersi (Herre, 1932)
   |  |-- B. panamensis Meek & Hildebrand, 1923 (Panama sand-eel)
   |  |-- B. paulensis Storey, 1939
   |  |-- B. scuticaris (Goode & Bean, 1880) (Whip eel)
   |  `-- B. sibogae (Weber, 1913)
   |--o Caecula Mioc. Eu. R. Oc. [Sphagebranchus] ()? [1 Recent species]
   |  `-- C. pterygera Vahl, 1794 (Finny snake eel)
   |--o Callechelys ()? [14]
   |  |-- C. bilinearis Kanazawa, 1952 (Twostripe snake eel)
   |  |-- C. bitaeniata (Peters, 1878)
   |  |-- C. catostoma (Schneider & Forster, 1801) (Black-striped snake eel)
   |  |-- C. cliffi Böhlke & Briggs, 1954 (Sandy ridgefin eel)
   |  |-- C. eristigma McCosker & Rosenblatt, 1972 (Spotted ridgefin eel)
   |  |-- C. galapagensis McCosker & Rosenblatt, 1998
   |  |-- C. guineensis (Osório, 1893) (Shorttail snake eel)
   |  |-- C. leucoptera (Cadenat, 1954)
   |  |-- C. lutea Snyder, 1904 (Yellow-spotted snake eel)
   |  |-- C. marmorata (Bleeker, 1853) (Marbled snake eel)
   |  |-- C. muraena Jordan & Evermann, 1887 (Blotched snake eel)
   |  |-- C. papulosa McCosker, 1998
   |  |-- C. randalli McCosker, 1998
   |  `-- C. springeri (Ginsburg, 1951) (Ridgefin eel)
   |--o Cirrhimuraena ()? [7]
   |  |-- C. calamus (Günther, 1870)
   |  |-- C. cheilopogon (Bleeker, 1860)
   |  |-- C. chinensis Kaup, 1856
   |  |-- C. inhacae (Smith, 1962) (Inhaca fringelip)
   |  |-- C. oliveri (Seale, 1910)
   |  |-- C. playfairii (Günther, 1870) (Fringelip snake-eel)
   |  `-- C. tapeinopterus Bleeker, 1863
   |--o Dalophis ()? [5]
   |  |-- D. boulengeri (Blache, Cadenat & Stauch, 1970)
   |  |-- D. cephalopeltis (Bleeker, 1863)
   |  |-- D. imberbis (Delaroche, 1809) (Armless snake eel)
   |  |-- D. multidentatus Blache & Bauchot, 1972
   |  `-- D. obtusirostris Blache & Cadenat, 1972
   |--o Echelus ()? [2]
   |  |-- E. myrus (Linnaeus, 1758) (Painted eel)
   |  `-- E. pachyrhynchus (Vaillant, 1888)
   |--o Echiophis ()? [4]
   |  |-- E. brunneus (Castro-Aguirre & Suárez de los Cobos, 1983) (Pacific spoon-nose eel)
   |  |-- E. creutzbergi (Cadenat, 1956) (Spoon-nose eel)
   |  |-- E. intertinctus (Richardson, 1848) (Spotted spoon-nose eel)
   |  `-- E. punctifer (Kaup, 1860) (Stippled spoon-nose eel)
   |--o Ethadophis ()? [5]
   |  |-- E. akkistikos McCosker & Böhlke, 1984
   |  |-- E. byrnei Rosenblatt & McCosker, 1970 (Ordinary eel)
   |  |-- E. epinepheli (Blache & Bauchot, 1972)
   |  |-- E. foresti (Cadenat & Roux, 1964)
   |  `-- E. merenda Rosenblatt & McCosker, 1970 (Snack eel)
   |-- †Goslinophis acuticaudus M. Eoc. Eu. 
   |--o Lamnostoma ()? [Nelson: 4 species] [FB: 5]
   |  |-- L. kampeni (Weber & de Beaufort, 1916) (Freshwater snake-eel)
   |  |-- L. mindora (Jordan & Richardson, 1908)
   |  |-- L. orientalis (McClelland, 1844) (Oriental worm-eel)
   |  |-- L. polyophthalma (Bleeker, 1853) (Ocellated sand-eel)
   |  `-- L. taylori (Herre, 1923)
   |--o Letharchus ()? [3]
   |  |-- L. aliculatus McCosker, 1974
   |  |-- L. rosenblatti McCosker, 1974 (Sailfin snake-eel)
   |  `-- L. velifer Goode & Bean, 1882 (American sailfin eel)
   |--o Myrichthys ()? [11]
   |  |-- M. aki Tanaka, 1917
   |  |-- M. aspetocheiros McCosker & Rosenblatt, 1993 (Longfin spotted snake-eel)
   |  |-- M. bleekeri Gosline, 1951
   |  |-- M. breviceps (Richardson, 1848) (Sharptail eel)
   |  |-- M. colubrinus (Boddaert, 1781) (Harlequin snake-eel)
   |  |-- M. maculosus (Cuvier, 1816) (Tiger snake-eel)
   |  |-- M. magnificus (Abbott, 1861) (Magnificent snake-eel)
   |  |-- M. ocellatus (Lesueur, 1825) (Goldspotted eel)
   |  |-- M. pardalis (Valenciennes, 1839) (Leopard eel)
   |  |-- M. tigrinus Girard, 1859 (Spotted snake-eel)
   |  `-- M. xysturus (Jordan & Gilbert, 1882)
   |--o Mystriophis ?Mioc. NZ. R. Oc. 
   |  |-- M. crosnieri Blache, 1971
   |  |-- M. porphyreus (Temminck & Schlegel, 1846)
   |  `-- M. rostellatus (Richardson, 1848) (African spoon-nose eel)
   |-- Ophichthus Eoc. Eu. R. Oc. ()? [55]
   |--o Phaenomonas ()? [3]
   |  |-- P. cooperae Palmer, 1970 (Short-maned sand-eel)
   |  |-- P. longissimus (Cadenat & Marchal, 1963) (Short-maned Sand Eel)
   |  `-- P. pinnata Myers & Wade, 1941 (Elastic eel)
   |--o Pisodonophis ()? [7]
   |  |-- P. boro (Hamilton, 1822) (Rice-paddy eel)
   |  |-- P. cancrivorus (Richardson, 1848) (Longfin snake-eel)
   |  |-- P. copelandi Herre, 1953
   |  |-- P. daspilotus Gilbert, 1898 (Marble-toothed snake-eel)
   |  |-- P. hoevenii (Bleeker, 1853) (Hoeven's snake eel)
   |  |-- P. hypselopterus (Bleeker, 1851)
   |  `-- P. semicinctus (Richardson, 1848)
   |--o Yirrkala ()? [7]
   |  |-- Y. gjellerupi (Weber & de Beaufort, 1916)
   |  |-- Y. insolitus McCosker, 1999
   |  |-- Y. kaupii (Bleeker, 1858)
   |  |-- Y. lumbricoides (Bleeker, 1853) Earthworm snake-eel
   |  |-- Y. macrodon (Bleeker, 1863)
   |  |-- Y. maculatus (Chu, Wu & Jin, 1981)
   |  `-- Y. tenuis (Günther, 1870) Thin sand-eel
   `== other 24 genera [Nelson, 1994]

Reference(s):