ngaensis, Haplochilichthys Ahl [E.] 1924:135 [Zoologischer Anzeiger v. 61(nos 5/6); ref. 15437] Nga-Zuflüssen bei Attogondema, Cameroon [possibly Noya, Gabon]. Lectotype: ZMB 21041. Paralectotypes: (10) ZMB 21619 (now 8), MNHN 1936-0036 [ex ZMB] (1). Type catalog: Bertin & Estève 1950:21 [ref. 19576], Paepke & Seegers 1986:151 [ref. 19981]. Types mentioned: Paepke 1995:95 [ref. 21847]. Lectotype selected by Paepke & Seegers 1986:151 [ref. 19981]; types discussed by Lambert & Clausen 1967:392 [ref. 29217]. •Valid as Procatopus ngaensis (Ahl 1924) -- (Huber 1999:59 [ref. 23835]). •Valid as Plataplochilus ngaensis (Ahl 1924) -- (Parenti 1981:513 [ref. 7066], Wildekamp et al. 1986:192 [ref. 6198], Lazara 2001:256 [ref. 25711], van der Zee et al. 2007:65 [ref. 30034], Huber 2011:6 [ref. 32018], Eberl et al. 2020:235 [ref. 37863], Fermon et al. 2022:266 [ref. 39448], Walsh et al. 2022:2854 [ref. 39051]) Current status: Valid as Plataplochilus ngaensis (Ahl 1924). Procatopodidae: Procatopodinae. Distribution: Western-central Africa: Gabon endemic. Habitat: freshwater.