taxistigma, Ochmacanthus Fowler [H. W.] 1914:268, Fig. 16 [Proceedings of the Academy of Natural Sciences of Philadelphia v. 66; ref. 1390] Rupununi River, Guyana, 2°-3°N, 50°20'W. Holotype (unique): ANSP 39344. Type catalog: Böhlke 1984:163 [ref. 13621], Ferraris 2007:406 [ref. 29155]. The specific name is an indeclinable noun. •Valid as Stegophilus taxistigma (Fowler 1914) -- (Burgess 1989:323 [ref. 12860]). •Valid as Henonemus taxistigma (Fowler 1914) -- (de Pinna & Wosiacki in Reis et al. 2003:274 [ref. 27061] as taxistigmus, DoNascimiento & Provenzano 2006:198 [ref. 28681] as taxistigmus, Ferraris 2007:406 [ref. 29155] as taxistigmus, DoNascimiento 2015:943 [ref. 34078] as taxistigmus, Taphorn et al. 2022:56 [ref. 41297]). Current status: Valid as Henonemus taxistigma (Fowler 1914). Trichomycteridae: Stegophilinae. Distribution: South America: Rupununi River basin (Guyana) endemic. Habitat: freshwater.