brevifile, Sicydium Ogilvie-Grant [W. R.] 1884:158, Pl. 12 (fig. 1) [Proceedings of the Zoological Society of London 1884 (pt 2) (art. 1) (for 4 Mar. 1884); ref. 18151] Cameroon. Holotype (unique): BMNH 1866.6.26.10. •Valid as Sicydium brevifile Ogilvie-Grant 1884 -- (Maugé 1986:382 [ref. 6218], Harrison & Miller in Lévêque et al. 1992:805 [ref. 21590], Harrison 1993:205 [ref. 22083], Pezold et al. 2006:970 [ref. 28916], Harrison et al. 2007:505 [ref. 30083], Wirtz et al. 2007:21, 39 [ref. 30263], Schliewen 2011:212 [ref. 31738], Miller & Murdy in Carpenter & De Angelis 2016:2841 [ref. 34618], Reiner 2019:266 [ref. 38139], Parenti 2021:414 [ref. 38603], Fermon et al. 2022:221 [ref. 39448]). Current status: Valid as Sicydium brevifile Ogilvie-Grant 1884. Oxudercidae: Sicydiinae. Distribution: Eastern Atlantic: Cameroon south to Gabon, including São Tomé and Principe [amphidromous]. Habitat: freshwater, brackish, marine.