elongatus, Monostichodus Vaillant [L. L.] in Rivière 1886:17 [La Revue scientifique: revue hebdomadaire illustrée (Revue rose), éd. par Jean Duhem. v. 38 [series 3: v. 23 (no. 1)]; ref. 17852] Africa [Ogowe or Congo River basin]. No types known. Hemistichodus vaillanti Pellegrin 1900 of authors. •Valid as Monostichodus elongatus Vaillant 1886 -- (Musschoot & Snoeks 2016:1080 [ref. 34892], Fermon et al. 2022:143 [ref. 39448], Musschoot 2024:343 [ref. 40817]). Current status: Valid as Monostichodus elongatus Vaillant 1886. Distichodontidae. Distribution: Western-central Africa: Gabon. Habitat: freshwater.