Species that contain: Gnathonemus and senegalensis [ 5 ] records

brucii, Gnathonemus Boulenger [G. A.] 1910:425 [Annals and Magazine of Natural History (Series 8) v. 6 (no. 34); ref. 14430] Ogun River at Aro, Lagos State, southern Nigeria. Holotype (unique): BMNH 1909.3.3.2. •Valid as Marcusenius brucii (Boulenger 1910) -- (Gosse 1984:80 [ref. 6169], Paugy & Bénech 1989:299 [ref. 26478], Bigorne & Paugy 1990:37 [ref. 13599], Kramer & Wink 2013:8 [2334] [ref. 32824]). •Synonym of Marcusenius senegalensis (Steindachner 1870) -- (Boden, pers. comm.). Current status: Synonym of Marcusenius senegalensis (Steindachner 1870). Mormyridae. Distribution: Western Africa: Bight Drainages ecoregion endemic [if valid]. Habitat: freshwater.

elongatus, Gnathonemus Pfaff [J. R.] 1933:276, Fig. 1 [Videnskabelige Meddelelser fra Dansk Naturhistorisk Forening, Kjøbenhavn v. 94; ref. 16517] Kabara, Mali, West Africa. Holotype (unique): ZMUC P21177. Type catalog: Nielsen 1974:29 [ref. 9588]. Subjectively invalid; secondarily preoccupied by Mormyrus elongatus Rüppell 1832 in Gnathonemus. Replaced by Gnathonemus pfaffi Fowler 1958. •Synonym of Marcusenius senegalensis (Steindachner 1870) -- (Daget 1984:89 [ref. 6170], Lévèque et al. 1991:138 [ref. 31367]). 2°Homonym. Current status: Synonym of Marcusenius senegalensis (Steindachner 1870). Mormyridae. Habitat: freshwater.

gambiensis, Gnathonemus Svensson [G. S. O.] 1933:34, Fig. 13 [Kongliga Vetenskaps-Academiens Handlingar, Stockholm v. 12 (no. 3); ref. 16524] Creeks and swamps along Gambia River, western Africa. Syntypes: NRM 11136 (3), 14564-73 (10, 1 per lot), 14584-85 (1, 1), 14599 (1), 17368 (1), 17637 (1), 31362 (1); ZMUU 404 (1). Type catalog: Wallin 1996:61 [ref. 32133]. •Synonym of Marcusenius senegalensis (Steindachner 1870) -- (Gosse 1984:89 [ref. 6169], Lévèque et al. 1991:138 [ref. 31367]). Current status: Synonym of Marcusenius senegalensis (Steindachner 1870). Mormyridae. Habitat: freshwater.

gracilis, Gnathonemus Pellegrin [J.] 1922:221 [Bulletin de la Société Zoologique de France v. 47 (no. 6/7); ref. 15365] Gribingui River, Lake Chad basin, Central African Republic. Holotype: MNHN 1922-0023. Type catalog: Bertin 1940:266 [ref. 293]. •Synonym of Marcusenius senegalensis (Steindachner 1870), but a valid subspecies -- (Gosse 1984:89 [ref. 6169], Lévèque et al. 1991:138 [ref. 31367], Fricke & Kramer 2022:499 [ref. 39495]). Current status: Synonym of Marcusenius senegalensis (Steindachner 1870). Mormyridae. Habitat: freshwater.

pfaffi, Gnathonemus Fowler [H. W.] 1958:8 [Notulae Naturae (Philadelphia) No. 310; ref. 1470] Kabara, Mali, West Africa, Niger. Holotype: ZMUC P21177. Replacement name for Gnathonemus elongatus Pfaff 1933, secondarily preoccupied by Mormyrus elongatus Rüppell 1832 when treated as congeneric. •Synonym of Marcusenius senegalensis (Steindachner 1870), but a valid subspecies -- (Daget 1984:89 [ref. 6170], Lévèque et al. 1991:138 [ref. 31367]). Replacement Name. Current status: Synonym of Marcusenius senegalensis (Steindachner 1870). Mormyridae. Habitat: freshwater.