After Carroll, 1988, and Nelson, 1994, with Recent species from Froese & Pauly, 2001 [“The Fishbase”]

<==o Synbranchiformes (yhdyskiduskalat)
   |?- Alabetidae [Alabetoidei] (kidusankeriaat) [a jr. synon. of Gobiesocidae]
   |-- Synbranchidae [Synbranchoidei] (suoankeriaat) [Nelson: 4/19] [Fishbase: 4/16]
   `--o Mastacembeloidei [Opisthomi] (puikkokalat)
      |-- Maestacambelidae (puikkokalat)
      `--o Chaudhuriidae ()? [5/8]
         |-- Bihunichthys monopteroides Kottelat & Lim, 1994
         |--o Chaudhuria ()? [2]
         |  |-- C. caudata Annandale, 1918 (Inle swamp eel)
         |  `-- C. fusipinnis Kottelat & Britz, 2000
         |--o Chendol Kottelat & Lim, 1994 ()? [2]
         |  |-- C. keelini Kottelat & Lim, 1994
         |  `-- C. lubricus Kottelat & Lim, 1994
         |-- Nagaichthys filipes Kottelat & Lim, 1991
         |--o Pillaia
         |  |-- P. indica Yazdani, 1972 (Hillstream spineless eel)
         |  |-- P. kachinica Kullander et al., 2000
         |  `-- P. khajuriai Talwar, Yazdani & Kundu, 1977 (Garo spineless eel)
         `?- Rhynchobdella sp. [not recognized by the Fishbase]

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