Marcusenius brucii (Boulenger)

Oladipo, Segun Olayinka, Everett, Amaya, Atofarati, Olabisi Tawakalit, Smith, Kennedy K., Nneji, Ifeanyi C., Adelakun, Kehinde Moruf & Nneji, Lotanna Micah, 2025, An updated ichthyofaunal checklist for the Nigerian Lagos Lagoon with notes on nomenclatural changes and the conservation status of species, Zootaxa 5646 (1), pp. 38-62 : 53

Marcusenius brucii (Boulenger) ;

Elephant fish ( Figure 2I )

Remarks: Marcusenius brucii , a synonym of Mormyrus senegalensis (Steindachner) was occasionally captured in the Epe and Ikorodu regions of NLL during the study. This species is known to inhabit the Ogun and Oshun Rivers in Nigeria and shares meristic similarities with Marcusenius senegalensis (Steindachner) , differing primarily in body shape and the structure of the caudal peduncle. Additionally, M. brucii has been previously reported in catches from the Lekki area of Lagos Lagoon during the rainy season. It is characterized by a well-developed, fleshy chin with a globular swelling and possesses 12 scales along the caudal peduncle, distinguishing it further among its congeners.

Figures

FIGURE 2. Representative pictures (A–L) of some newly collected fish species from the Nigerian Lagos Lagoon (A) Fontitrygon margaritella (Compagno & Roberts); (B) Strongylura senegalensis (Valenciennes); (C) Caranx fischeri (Smith- Vaniz & Carpenter); (D) Chloroscombrus chrysurus (Linnaeus); (E) Selene dorsalis (Gill); (F) Trachinotus falcatus (Linnaeus); (G) Trachinotus ovatus (Linnaeus); (H) Heterotis niloticus (Cuvier); (I) Marcusenius brucii (Boulenger); (J) Coptodon zillii (Gervais); (K) Oreochromis niloticus (Linnaeus); and (L) Citharinus citharus (Geoffroy Saint-Hilaire). Photo credit and Identification: Dr. S.O. Oladipo.