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.