yseuxi, Bryconaethiops Boulenger [G. A.] 1899:82, Pl. 37 (fig. 2) [Annales du Musee du Congo (Ser. Zoologie) v. 1 (fasc. 4); ref. 549] "Haut Congo" [Upper Congo River basin above Matadi]. Holotype (unique): BMNH 1899.6.27.38. See Ibala Zamba et al. 2007:1216 [ref. 29470] for definition of "Haut Congo" -- an old term for the Conge R. basin above Matidi (5°49'S, 13°27'E). •Synonym of Bryconaethiops microstoma Günther 1873 -- (Paugy 1984:166 [ref. 6183]). •Valid as Bryconaethiops yseuxi Boulenger 1899 -- ( Ibala Zamba et al. 2007:1216 [ref. 29470]). Current status: Valid as Bryconaethiops yseuxi Boulenger 1899. Alestidae. Distribution: Central Africa: lower Congo River basin from Boma to Pool Malebo (formerly Stanley Pool), Democratic Republic of Congo and Republic of Congo. Habitat: freshwater.