thomasi, Gnathonemus Boulenger [G. A.] 1916:164, Fig. 108 [Catalogue of the fresh-water fishes of Africa v. 4; ref. 585] Northern Sherbo District, Sierra Leone. Holotype (unique): BMNH 1915.4.13.5. •Valid as Marcusenius thomasi (Boulenger 1916) -- (Gosse 1984:90 [ref. 6169], Lévêque et al. 1989:114 [ref. 26480], Bigorne & Paugy 1990:38 [ref. 13599], Bigorne in Lévêque et al. 1990:143 [ref. 21589], Paugy et al. 1990:336 [ref. 26477], Kramer & Wink 2013:9 [2335] [ref. 32824]). Current status: Valid as Marcusenius thomasi (Boulenger 1916). Mormyridae. Distribution: Western Africa. Habitat: freshwater, brackish.