flavomarginatus, Mastacembelus Boulenger [G. A.] 1898:23 [Transactions of the Zoological Society of London v. 15 (pt 1, no. 1); ref. 547] Gabon. Syntypes: BMNH 1872.1.27.1 (1), 1888.12.13.40 (1), 1896.5.5.26 (1). •Valid as Caecomastacembelus flavomarginatus (Boulenger 1898) -- (Travers 1984:145 [ref. 5147], Gosse 1986:423 [ref. 6194]). •In Mastacembelus to agree with current placement of Caecomastacembelus. •Valid as Mastacembelus flavomarginatus Boulenger 1898 -- (Brown et al. 2011:287 [ref. 31286], Fermon et al. 2022:226 [ref. 39448]). Current status: Valid as Mastacembelus flavomarginatus Boulenger 1898. Mastacembelidae. Distribution: Western-central Africa: southern Cameroon south to Angola. Habitat: freshwater.