n = 83
| Scientific Name | Author | Valid Name | Family | English Name |
|---|---|---|---|---|
| Gnathonemus abadii | Boulenger, 1901 | Marcusenius abadii | Mormyridae | |
| Gnathonemus aelsbroecki | Poll, 1945 | Cyphomyrus aelsbroecki | Mormyridae | |
| Gnathonemus alces | Boulenger, 1920 | Campylomormyrus alces | Mormyridae | |
| Gnathonemus angolensis | Boulenger, 1905 | Marcusenius angolensis | Mormyridae | |
| Gnathonemus annamariae | Parenzan, 1939 | Marcusenius annamariae | Mormyridae | |
| Gnathonemus barbatus | Poll, 1967 | Gnathonemus barbatus | Mormyridae | |
| Gnathonemus baudoni | Pellegrin, 1919 | Brevimyrus niger | Mormyridae | |
| Gnathonemus bentleyi | (Boulenger, 1897) | Marcusenius bentleyi | Mormyridae | |
| Gnathonemus bredoi | Poll, 1945 | Campylomormyrus bredoi | Mormyridae | |
| Gnathonemus brevicaudatus | Pellegrin, 1919 | Gnathonemus petersii | Mormyridae | Elephantnose fish |
| Gnathonemus brucii | Boulenger, 1910 | Marcusenius brucii | Mormyridae | |
| Gnathonemus bruyerei | Pellegrin, 1904 | Marcusenius ussheri | Mormyridae | |
| Gnathonemus cassaicus | Poll, 1967 | Campylomormyrus cassaicus | Mormyridae | |
| Gnathonemus christyi | Boulenger, 1920 | Campylomormyrus christyi | Mormyridae | |
| Gnathonemus compressirostris | Pellegrin, 1924 | Campylomormyrus compressirostris | Mormyridae | |
| Gnathonemus cuangoanus | Poll, 1967 | Marcusenius cuangoanus | Mormyridae | |
| Gnathonemus curvirostris | Boulenger, 1898 | Campylomormyrus curvirostris | Mormyridae | |
| Gnathonemus cyprinoides | (Linnaeus, 1758) | Marcusenius cyprinoides | Mormyridae | |
| Gnathonemus cyprinoides elongata | (Rüppell, 1832) | Marcusenius cyprinoides | Mormyridae | |
| Gnathonemus deboensis | Daget, 1954 | Marcusenius deboensis | Mormyridae | |
| Gnathonemus dundoensis | Poll, 1967 | Marcusenius dundoensis | Mormyridae | |
| Gnathonemus echidnorhynchus | Pellegrin, 1924 | Gnathonemus echidnorhynchus | Mormyridae | |
| Gnathonemus elephas | Boulenger, 1898 | Campylomormyrus elephas | Mormyridae | |
| Gnathonemus friteli | Pellegrin, 1904 | Marcusenius friteli | Mormyridae | |
| Gnathonemus furcidens | Pellegrin, 1920 | Marcusenius furcidens | Mormyridae | |
| Gnathonemus fuscus | Pellegrin, 1901 | Marcusenius fuscus | Mormyridae | |
| Gnathonemus gambiensis | Svensson, 1933 | Marcusenius senegalensis | Mormyridae | |
| Gnathonemus ghesquierei | Poll, 1945 | Marcusenius ghesquierei | Mormyridae | |
| Gnathonemus gilli | Boulenger, 1904 | Marcusenius abadii | Mormyridae | |
| Gnathonemus gracilis | Pellegrin, 1922 | Marcusenius senegalensis | Mormyridae | |
| Gnathonemus graeverti | Steindachner, 1914 | Marcusenius macrolepidotus | Mormyridae | Bulldog |
| Gnathonemus greshoffi | (Schilthuis, 1891) | Marcusenius greshoffii | Mormyridae | |
| Gnathonemus harringtoni | (Boulenger, 1905) | Hippopotamyrus pictus | Mormyridae | |
| Gnathonemus histrio | Fowler, 1936 | Gnathonemus petersii | Mormyridae | Elephantnose fish |
| Gnathonemus ibis | Boulenger, 1902 | Campylomormyrus numenius | Mormyridae | |
| Gnathonemus kutuensis | Boulenger, 1899 | Marcusenius kutuensis | Mormyridae | |
| Gnathonemus lambouri | Pellegrin, 1904 | Marcusenius lambouri | Mormyridae | |
| Gnathonemus leopoldianus | Boulenger, 1899 | Marcusenius leopoldianus | Mormyridae | |
| Gnathonemus livingstonii | Boulenger, 1899 | Marcusenius livingstonii | Mormyridae | |
| Gnathonemus longibarbis | (Hilgendorf, 1888) | Gnathonemus longibarbis | Mormyridae | Longnose stonebasher |
| Gnathonemus lualabaensis | David & Poll, 1937 | Campylomormyrus rhynchophorus | Mormyridae | |
| Gnathonemus luapulaensis | David & Poll, 1937 | Campylomormyrus luapulaensis | Mormyridae | |
| Gnathonemus macrolepidotus | (Peters, 1852) | Marcusenius macrolepidotus | Mormyridae | Bulldog |
| Gnathonemus macrolepidotus angolensis | Boulenger, 1905 | Marcusenius angolensis | Mormyridae | |
| Gnathonemus macrolepidotus f. okavangensis | Pappenheim, 1907 | Marcusenius macrolepidotus | Mormyridae | Bulldog |
| Gnathonemus macrolepidotus macrolepidotus | (Peters, 1852) | Marcusenius macrolepidotus | Mormyridae | Bulldog |
| Gnathonemus macrophthalmus | Pellegrin, 1924 | Marcusenius macrophthalmus | Mormyridae | |
| Gnathonemus mento | (Boulenger, 1890) | Marcusenius mento | Mormyridae | |
| Gnathonemus mirus | Boulenger, 1898 | Campylomormyrus mirus | Mormyridae | |
| Gnathonemus moeruensis | Boulenger, 1915 | Marcusenius macrolepidotus | Mormyridae | Bulldog |
| Gnathonemus monteiri | (Günther, 1873) | Marcusenius monteiri | Mormyridae | Monteiri's bulldog |
| Gnathonemus monteiroi | (Günther, 1873) | Marcusenius monteiri | Mormyridae | Monteiri's bulldog |
| Gnathonemus moorei | (Günther, 1867) | Marcusenius moorii | Mormyridae | |
| Gnathonemus moori | (Günther, 1867) | Marcusenius moorii | Mormyridae | |
| Gnathonemus moorii | (Günther, 1867) | Marcusenius moorii | Mormyridae | |
| Gnathonemus moorii longulus | David & Poll, 1937 | Marcusenius lambouri | Mormyridae | |
| Gnathonemus niger | (Günther, 1866) | Brevimyrus niger | Mormyridae | |
| Gnathonemus ntemensis | Pellegrin, 1927 | Marcusenius ntemensis | Mormyridae | |
| Gnathonemus numenius | Boulenger, 1898 | Campylomormyrus numenius | Mormyridae | |
| Gnathonemus nyasensis | Worthington, 1933 | Marcusenius nyasensis | Mormyridae | |
| Gnathonemus okavangensis | Pappenheim, 1907 | Marcusenius macrolepidotus | Mormyridae | Bulldog |
| Gnathonemus peters | (Günther, 1862) | Gnathonemus petersii | Mormyridae | Elephantnose fish |
| Gnathonemus petersi | (Günther, 1862) | Gnathonemus petersii | Mormyridae | Elephantnose fish |
| Gnathonemus petersii | (Günther, 1862) | Gnathonemus petersii | Mormyridae | Elephantnose fish |
| Gnathonemus pfaffi | Fowler, 1958 | Marcusenius senegalensis | Mormyridae | |
| Gnathonemus phantasticus | Pellegrin, 1927 | Campylomormyrus phantasticus | Mormyridae | |
| Gnathonemus pictus | (Marcusen, 1864) | Hippopotamyrus pictus | Mormyridae | |
| Gnathonemus pongolensis | Fowler, 1934 | Marcusenius pongolensis | Mormyridae | |
| Gnathonemus rheni | Fowler, 1936 | Marcusenius rheni | Mormyridae | |
| Gnathonemus rhodesianus | Määr, 1962 | Marcusenius macrolepidotus | Mormyridae | Bulldog |
| Gnathonemus rhynchophorus | Boulenger, 1898 | Campylomormyrus rhynchophorus | Mormyridae | |
| Gnathonemus rhynchophorus lualabaensis | David & Poll, 1937 | Campylomormyrus rhynchophorus | Mormyridae | |
| Gnathonemus rhynchophorus luapulaensis | David & Poll, 1937 | Campylomormyrus luapulaensis | Mormyridae | |
| Gnathonemus schilthuisiae | Boulenger, 1899 | Marcusenius schilthuisiae | Mormyridae | |
| Gnathonemus senegalensis | (Steindachner, 1870) | Marcusenius senegalensis | Mormyridae | |
| Gnathonemus senegalensis gracilis | Pellegrin, 1922 | Marcusenius senegalensis | Mormyridae | |
| Gnathonemus senegalensis senegalensis | (Steindachner, 1870) | Marcusenius senegalensis | Mormyridae | |
| Gnathonemus stanleyanus | (Boulenger, 1897) | Marcusenius stanleyanus | Mormyridae | |
| Gnathonemus tamandua | (Günther, 1864) | Campylomormyrus tamandua | Mormyridae | Wormjawed mormyrid |
| Gnathonemus thomasi | Boulenger, 1916 | Marcusenius thomasi | Mormyridae | |
| Gnathonemus tshokwe | Poll, 1967 | Campylomormyrus tshokwe | Mormyridae | |
| Gnathonemus ussheri | (Günther, 1867) | Marcusenius ussheri | Mormyridae | |
| Gnathonemus victoriae | Worthington, 1929 | Marcusenius victoriae | Mormyridae | Victoria stonebasher |