crassus, Xenocharax Pellegrin [J.] 1900:100 [Bulletin du Muséum National d'Histoire Naturelle (Série 1) v. 6 (no. 3); ref. 14734] Alima River at Leketi, Upper Congo [Republic of the Congo]. Holotype (unique): MNHN 1886-0384. Type catalog: Bertin 1948:41 [ref. 19577]. •Synonym of Xenocharax spilurus Günther 1867 -- (Daget & Gosse 1984:210 [ref. 6185]). •Valid as Xenocharax crassus Pellegrin 1900 -- (Ibala Zamba et al. 2016:349 [ref. 34935], Musschoot 2024:354 [ref. 40817]). Current status: Valid as Xenocharax crassus Pellegrin 1900. Distichodontidae. Distribution: Central Africa: Congo River basin, Republic of Congo and the Democratic Republic of Congo. Habitat: freshwater.