After Harold & Weitzman, 1996, with Recent species from Froese & Pauly, 2001 [“The Fishbase”]

Alternative classification after Nelson, 1994

<==o Gonostomatidae (sukasuut; bristlemouths)
   |?- †Gonorynchops U. Cret. Eu. NA. 
   |-- †Indrissia jubae U. Cret. NAf.
   |-- †Paravinciguerria U. Cret. NAf. 
   |?- †Protostomias maroccanus U. Cret. NAf. 
   |--o †Scopeloides [Mrazecia] Olig. Mioc. Eu.
   |  `-- †S. glarisianus 
   |--+-- Bonapartia pedaliota Goode & Bean, 1896 [Zaphotias]
   |  `--o Margrethia ()? [2]
   |     |-- M. obtusirostra Jespersen & Tåning, 1919
   |     `-- M. valentinae Parin, 1982
   `--o Gonostoma Mioc. Eu. Plioc. NAf. R. Oc. [Sigmops] [paraphyletic]
      |?- †Gonostoma albyi
      |-- Gonostoma atlanticum Norman, 1930 (Atlantic fangjaw)
      |-- Gonostoma denudatum Rafinesque, 1810
      `--+-- Gonostoma elongatum (Günther, 1878) [Sigmops] (Elongated bristlemouth fish)
         `--+-- Gonostoma ebelingi (Grey, 1960) [Sigmops] (Ebeling's fangjaw)
            |-- Gonostoma longipinnis (Mukhacheva, 1972) [Sigmops]
            |-- Gonostoma gracile (Günther, 1878) [Sigmops] (Slender fangjaw)
            `--+-- Gonostoma bathyphilum (Vaillant, 1884) [Sigmops]
               `--o Cyclothone [Regenius] Mioc. NA. R. Oc. ()? [N: 12] [FB: 14]
                  |-- C. acclinidens Garman, 1899 (Benttooth bristlemouth)
                  |-- C. alba Brauer, 1906 (Bristlemouth)
                  |-- C. atraria Gilbert, 1905 (Deep-water bristlemouth)
                  |-- C. braueri Jespersen & Tåning, 1926 (Garrick)
                  |-- C. kobayashii Miya, 1994
                  |-- C. livida Brauer, 1902
                  |-- C. microdon (Günther, 1878) (Veiled anglemouth)
                  |-- C. obscura Brauer, 1902
                  |-- C. pacifica Mukhacheva, 1964 (Yellow bristlemouth)
                  |-- C. pallida Brauer, 1902 (Tan bristlemouth)
                  |-- C. parapallida Badcock, 1982
                  |-- C. pseudopallida Mukhacheva, 1964 (Slender bristlemouth)
                  |-- C. pygmaea Jespersen & Tåning, 1926
                  `-- C. signata Garman, 1899 (Showy bristlemouth)

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