After Nelson, 1994 and Froese & Pauly, 2001 [“The FishBase”]

<==o Distichodontidae [Citharinidae: Distichodontinae sensu Nelson, 1994]
   |-- Xenocharax spilurus Günther, 1867
   `--+-- Nannaethiops unitaeniatus Günther, 1872 (Oneline tetra)
      `--+--o Neolebias
         |  |-- N. ansorgii Boulenger, 1912
         |  |-- N. axelrodi Poll & Gosse, 1963
         |  |-- N. gracilis Matthes, 1964
         |  |-- N. kerguennae Daget, 1980
         |  |-- N. philippei Poll & Gosse, 1963
         |  |-- N. powelli Teugels & Roberts, 1990
         |  |-- N. trewavasae Poll & Gosse, 1963
         |  |-- N. trilineatus Boulenger, 1899 (Threeline tetra)
         |  `-- N. unifasciatus Steindachner, 1894
         `--+--o Congocharax
            |  |-- C. gossei Poll & Lambert, 1964
            |  |-- C. olbrechtsi (Poll, 1954)
            |  `-- C. spilotaenia (Boulenger, 1912)
            `--+-- Dundocharax bidentatus Poll, 1967
               `--+-- Paradistichodus dimidiatus (Pellegrin, 1904)
                  `--+-- Distichodus ()? [22]
                     `--+-- Nannocharax ()? [25]
                        `--+--o Hemigrammocharax
                           |  |-- H. angolensis Poll, 1967
                           |  |-- H. lineostriatus Poll, 1967
                           |  |-- H. machadoi Poll, 1967 (Dwarf citharine)
                           |  |-- H. minutus (Worthington, 1933)
                           |  |-- H. monardi Pellegrin, 1936
                           |  |-- H. multifasciatus (Boulenger, 1923) (Multibar citharine)
                           |  |-- H. ocellicauda (Boulenger, 1907)
                           |  |-- H. uniocellatus (Pellegrin, 1926)
                           |  `-- H. wittei Poll, 1933
                           `--+--o Hemistichodus
                              |  |-- H. lootensi Poll & Daget, 1968
                              |  |-- H. mesmaekersi Poll, 1959
                              |  `-- H. vaillanti Pellegrin, 1900
                              `--+--o Ichthyborus (gaviaalitetrat)
                                 |  |--o I. besse (Joannis, 1835)
                                 |  |  |-- I. b. besse (Joannis, 1835)
                                 |  |  `-- I. b. congolensis Giltay, 1930
                                 |  |-- I. monodi (Pellegrin, 1927)
                                 |  |-- I. ornatus (Boulenger, 1899) (korugaviaalitetra)
                                 |  `-- I. quadrilineatus (Pellegrin, 1904)
                                 `--+--o Microstomatichthyoborus
                                    |  |-- M. bashforddeani Nichols & Griscom, 1917
                                    |  `-- M. katangae David & Poll, 1937
                                    `--+-- Mesoborus crocodilus Pellegrin, 1900
                                       `--+--o Eugnathichthys
                                          |  |-- E. eetveldii Boulenger, 1898
                                          |  `-- E. macroterolepis Boulenger, 1899
                                          `--+-- Paraphago rostratus Boulenger, 1899
                                             `--+--o Phago
                                                |  |-- P. boulengeri Schilthuis, 1891
                                                |  |-- P. intermedius Boulenger, 1899
                                                |  `-- P. loricatus Günther, 1865 (African pike-characin)
                                                `--o Belanophago
                                                   |-- B. hutsebouti Giltay, 1929
                                                   `-- B. tinanti Poll, 1939

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