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

<==o Bythitinae
   |--o Bythites [4]
   |  |-- B. fuscus Reinhardt, 1837
   |  |-- B. gerdae Nielsen & Cohen, 1973
   |  |-- B. hollisi Cohen, Rosenblatt & Moser, 1990
   |  `-- B. islandicus Nielsen & Cohen, 1973
   |--o Calamopteryx [3]
   |  |-- C. goslinei Böhlke & Cohen, 1966 (Longarm brotula)
   |  |-- C. jeb Cohen, 1973
   |  `-- C. robinsorum Cohen, 1973
   |--o Cataetyx [11]
   |  |-- C. alleni (Byrne, 1906)
   |  |-- C. bruuni (Nielsen & Nybelin, 1963)
   |  |-- C. chthamalorhynchus Cohen, 1981
   |  |-- C. hawaiiensis Gosline, 1954
   |  |-- C. laticeps Koefoed, 1927
   |  |-- C. lepidogenys (Smith & Radcliffe, 1913)
   |  |-- C. messieri (Günther, 1878)
   |  |-- C. niki Cohen, 1981 (Brown brotula)
   |  |-- C. platyrhynchus Machida, 1984
   |  |-- C. rubrirostris Gilbert, 1890 (Rubynose brotula)
   |  `-- C. simus Garman, 1899
   |--o Diplacanthopoma [8]
   |  |-- D. alcockii Goode & Bean, 1896
   |  |-- D. brachysoma Günther, 1887
   |  |-- D. brunnea Smith & Radcliffe, 1913
   |  |-- D. japonicus (Steindachner & Döderlein, 1887)
   |  |-- D. jordani Garman, 1899
   |  |-- D. nigripinnis Gilchrist & von Bonde, 1924
   |  |-- D. raniceps Alcock, 1898
   |  `-- D. riversandersoni Alcock, 1895
   |?- Oligopus
   |--o Saccogaster [8]
   |  |-- S. hawaii Cohen & Nielsen, 1972
   |  |-- S. maculata Alcock, 1889
   |  |-- S. melanomycter Cohen, 1981
   |  |-- S. normae Cohen & Nielsen, 1972
   |  |-- S. parva Cohen & Nielsen, 1972
   |  |-- S. rhamphidognatha Cohen, 1987
   |  |-- S. staigeri Cohen & Nielsen, 1972
   |  `-- S. tuberculata (Chan, 1966)
   |-- Stygnobrotula latebricola Böhlke, 1957 (Black widow)
   `== other 7 genera 

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