Gnathonemus abadii – synonym of Marcusenius abadii
Gnathonemus aelsbroecki – synonym of Hippopotamyrus aelsbroecki
Gnathonemus alces – synonym of Campylomormyrus alces
Gnathonemus angolensis – synonym of Marcusenius macrolepidotus
Gnathonemus annamariae – synonym of Marcusenius annamariae
Gnathonemus barbatus – synonym of Gnathonemus histrio
Gnathonemus bentleyi – synonym of Marcusenius bentleyi
Gnathonemus bredoi – synonym of Campylomormyrus bredoi
Gnathonemus brevicaudatus – synonym of Gnathonemus petersii
Gnathonemus brevicaudatus : Bigorne, 1990 – synonym of Gnathonemus petersii
Gnathonemus brevicaudatus : Gosse, 1966 – synonym of Gnathonemus histrio
Gnathonemus brucii – synonym of Marcusenius brucii
Gnathonemus bruyerei – synonym of Marcusenius ussheri
Gnathonemus cassaicus – synonym of Campylomormyrus cassaicus
Gnathonemus christyi – synonym of Campylomormyrus christyi
Gnathonemus compressirostris – synonym of Campylomormyrus rhynchophorus
Gnathonemus cuangoanus – synonym of Marcusenius cuangoanus
Gnathonemus curvirostris – synonym of Campylomormyrus curvirostris
Gnathonemus cyprinoides – synonym of Marcusenius cyprinoides
Gnathonemus cyprinoides var. elongata – synonym of Marcusenius cyprinoides
Gnathonemus deboensis – synonym of Marcusenius deboensis
Gnathonemus dundoensis – synonym of Marcusenius dundoensis
Gnathonemus elephas – synonym of Campylomormyrus elephas
Gnathonemus elongatus – synonym of Marcusenius senegalensis
Gnathonemus friteli – synonym of Marcusenius friteli
Gnathonemus furcidens – synonym of Marcusenius furcidens
Gnathonemus fuscus – synonym of Marcusenius fuscus
Gnathonemus gambiensis – synonym of Marcusenius senegalensis
Gnathonemus ghesquierei – synonym of Marcusenius ghesquierei
Gnathonemus gilli – synonym of Marcusenius abadii
Gnathonemus gracilis – synonym of Marcusenius senegalensis
Gnathonemus graeverti – synonym of Marcusenius macrolepidotus
Gnathonemus greshoffi – synonym of Marcusenius greshoffi
Gnathonemus harringtoni – synonym of Hippopotamyrus harringtoni
Gnathonemus kutuensis – synonym of Marcusenius kutuensis
Gnathonemus lambouri – synonym of Marcusenius moorii
Gnathonemus lepoldianus – synonym of Marcusenius leopoldianus
Gnathonemus livingstonii – synonym of Marcusenius livingstonii
Gnathonemus lualabaensis – synonym of Campylomormyrus rhynchophorus
Gnathonemus luapulaensis – synonym of Campylomormyrus luapulaensis
Gnathonemus macrolepidotus – synonym of Marcusenius macrolepidotus
Gnathonemus macrolepidotus angolensis – synonym of Marcusenius macrolepidotus
Gnathonemus macrolepidotus macrolepidotus – synonym of Marcusenius macrolepidotus
Gnathonemus macrophthalmus – synonym of Marcusenius greshoffi
Gnathonemus mento – synonym of Marcusenius mento
Gnathonemus mirus – synonym of Campylomormyrus mirus
Gnathonemus moeruensis – synonym of Marcusenius macrolepidotus
Gnathonemus moorii – synonym of Marcusenius moorii
Gnathonemus moorii longulus – synonym of Marcusenius moorii
Gnathonemus niger – synonym of Brienomyrus niger
Gnathonemus ntemensis – synonym of Marcusenius ntemensis
Gnathonemus numenius – synonym of Campylomormyrus numenius
Gnathonemus nyasensis – synonym of Marcusenius nyasensis
Gnathonemus okavangensis – synonym of Marcusenius macrolepidotus
Gnathonemus pfaffi – synonym of Marcusenius senegalensis
Gnathonemus phantasticus – synonym of Campylomormyrus phantasticus
Gnathonemus pictus – synonym of Hippopotamyrus pictus
Gnathonemus pongolensis – synonym of Marcusenius macrolepidotus
Gnathonemus rheni – synonym of Marcusenius rheni
Gnathonemus rhodesianus – synonym of Marcusenius rhodesianus
Gnathonemus rhynchophorus – synonym of Campylomormyrus rhynchophorus
Gnathonemus rhynchophorus luapulaensis – synonym of Campylomormyrus luapulaensis
Gnathonemus schilthuisiae – synonym of Marcusenius schilthuisiae
Gnathonemus senegalensis – synonym of Marcusenius senegalensis
Gnathonemus senegalensis elongatus: – synonym of Marcusenius senegalensis
Gnathonemus senegalensis gracilis – synonym of Marcusenius senegalensis
Gnathonemus senegalensis pfaffi – synonym of Marcusenius senegalensis
Gnathonemus senegalensis senegalensis – synonym of Marcusenius senegalensis
Gnathonemus stanleyanus – synonym of Marcusenius senegalensis
Gnathonemus stanleyanus – synonym of Marcusenius stanleyanus
Gnathonemus tamandua – synonym of Campylomormyrus tamandua
Gnathonemus thomasi – synonym of Marcusenius thomasi
Gnathonemus tshokwe – synonym of Campylomormyrus tshokwe
Gnathonemus ussheri – synonym of Marcusenius ussheri
Gnathonemus victoriae – synonym of Marcusenius victoriae
Gymnarchus electricus – synonym of Gymnarchus niloticus
Gymnotus notopterus – synonym of Notopterus notopterus