bicornis, Neostethus Regan [C. T.] 1916:14, Fig. 11 [Proceedings of the Zoological Society of London 1916 (pt 1); ref. 3667] Brackish water at Kuala Langat, peninsular Malaysia. Lectotype: BMNH 1937.12.9.4. Paralectotypes: BMNH 1937.12.9.5-6 (2). Lectotype selected by Parenti 1989:269 [ref. 13486]. •Valid as Neostethus bicornis Regan 1916 -- (Parenti 1989:269 [ref. 13486], Kottelat et al. 1993:95 [ref. 23448], Kottelat & Lim 1996:244 [ref. 23210], Parenti & Louie 1998:142 [ref. 23544], Parenti 1999:2148 [ref. 24784], Parenti in Randall & Lim 2000:599 [ref. 25122], Shibukawa 2009:45 [ref. 30449], Shibukawa et al. 2012:44 [ref. 32037], Kottelat 2013:284 [ref. 32989], Parenti 2014:178 [ref. 33268], Sulaiman et al. 2018:45 [ref. 35802], Taki et al. 2021:321 [ref. 39830], Jamandre 2023:161 [ref. 40455]). Current status: Valid as Neostethus bicornis Regan 1916. Phallostethidae. Distribution: Southeast Asia: Andaman Sea; lower Mekong River basin (Vietnam); Philippines. Habitat: freshwater, brackish.