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

<==o Congrinae [incl. Macrocephenchelyidae] ()? [Nelson: 25 genera]
   |-- Acromycter nezumi (Asano, 1958)
   |--o Conger Eoc. Olig. NA. Mioc. NZ. R. Oc. (meriankeriaat) [11]
   |  |-- C. cinereus Rüppell, 1830 (Longfin African conger)
   |  |-- C. conger (Linnaeus, 1758) (meriankerias; European conger)
   |  |-- C. erebennus (Jordan & Snyder, 1901)
   |  |-- C. esculentus Poey, 1861 (Grey conger)
   |  |-- C. japonicus Bleeker, 1879 (Beach conger)
   |  |-- C. myriaster (Brevoort, 1856)
   |  |-- C. oceanicus (Mitchill, 1818) (American conger)
   |  |-- C. orbignyanus Valenciennes, 1847 (Argentine conger)
   |  |-- C. triporiceps Kanazawa, 1958 (Manytooth conger)
   |  |-- C. verreauxi Kaup, 1856 (Conger)
   |  `-- C. wilsoni (Bloch & Schneider, 1801) (Cape conger)
   |-- Gavialiceps
   |--o Gnathophis ()? [16]
   |  |-- G. andriashevi Karmovskaya, 1990
   |  |-- G. bathytopos Smith & Kanazawa, 1977 (Blackgut conger)
   |  |-- G. bracheatopos Smith & Kanazawa, 1977 (Longeye conger)
   |  |-- G. capensis (Kaup, 1856) (Southern conger)
   |  |-- G. catalinensis (Wade, 1946) (Catalina conger)
   |  |-- G. cinctus (Garman, 1899) (Hardtail conger)
   |  |-- G. codoniphorus Maul, 1972
   |  |-- G. habenatus (Richardson, 1848) (Little conger eel)
   |  |-- G. longicauda (Ramsay & Ogilby, 1888)
   |  |-- G. mystax (Delaroche, 1809) (Thinlip conger)
   |  |--o G. nystromi (Jordan & Snyder, 1901)
   |  |  |-- G. n. ginanago (Asano, 1958)
   |  |  `-- G. n. nystromi (Jordan & Snyder, 1901)
   |  |-- G. parini Karmovskaya, 1990
   |  |-- G. smithi Karmovskaya, 1990
   |  |-- G. umbrellabius (Whitley, 1946) (Umbrella conger)
   |  `-- G. xenica (Matsubara & Ochiai, 1951)
   |?- Hildebrandia
   |-- Lumiconger arafura Castle & Paxton, 1984
   |-- Macrocephenchelys brachialis Fowler, 1934
   |--o Rhechias ()? [3]
   |  |-- R. bertini (Poll, 1953)
   |  |-- R. retrotincta (Jordan & Snyder, 1901)
   |  `-- R. thysanochila (Reid, 1934) (Conger eel)
   |--o Rhynchoconger ()? [7]
   |  |-- R. brevirostris Chen & Weng, 1967
   |  |-- R. ectenurus (Jordan & Richardson, 1909)
   |  |-- R. flava (Goode & Bean, 1896) (Yellow conger)
   |  |-- R. gracilior (Ginsburg, 1951) (Whiptail conger)
   |  |-- R. guppyi (Norman, 1925)
   |  |-- R. nitens (Jordan & Bollman, 1890) (Bignose conger)
   |  `-- R. trewavasae Ben-Tuvia, 1993
   |--o Uroconger Mioc. Plioc. Aus. R. Oc. ()?[3]
   |  |-- U. erythraeus Castle, 1982
   |  |-- U. lepturus (Richardson, 1845) (Slender conger)
   |  `-- U. syringinus Ginsburg, 1954 (Threadtail conger)
   |--o Xenomystax [Paraxenomystax] ()? [3]
   |  |-- X. atrarius Gilbert, 1891 (Deepwater conger)
   |  |-- X. bidentatus (Reid, 1940)
   |  `-- X. trucidans Alcock, 1894
   `== other 14 genera

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