tenuicauda, Mormyrus Steindachner [F.] 1894:69, Pl. 4 (fig. 1) [Notes from the Leyden Museum v. 16 (nos 1-2, art. 1); ref. 4237] Queah and Junk rivers, Liberia. Syntypes: (12) BMNH 1896.2.19.1-2 (2); NMW 55111-12 (3, 1); RMNH 5347 (2), 5355-56 (1, 4). •Synonym of Petrocephalus simus Sauvage 1879 -- (Gosse 1984:114 [ref. 6169]). •Valid as Petrocephalus tenuicauda (Steindachner 1894) -- (Bigorne in Lévêque et al. 1990:174 [ref. 21589], Bigorne & Paugy 1991:24 [ref. 20122], Kramer et al. 2012:2233 [ref. 32160], Pezold et al. 2016:103 [ref. 34870]). Current status: Valid as Petrocephalus tenuicauda (Steindachner 1894). Mormyridae. Distribution: Western Africa. Habitat: freshwater.