tenuicauda, Plecostomus Steindachner [F.] 1878:90 [Anzeiger der Kaiserlichen Akademie der Wissenschaften, Wien, Mathematisch-Naturwissenschaftliche Classe v. 15 (no. 12) (for 9 May 1878); ref. 20476] Río Magdalena, Colombia. Syntypes: (several) MSNG 8856 (1); NMW 42596 (1), 44263-66 (1, 1, 1, 1, 3), 44268 (1), 44294 (1); ZMUC 85 (1). Type catalog: Tortonese 1963:311 [ref. 10351], Nielsen 1974:52 [ref. 9588], Ferraris 2007:298 [ref. 29155]. Species later illustrated and described in more detail in Steindachner 1879:40 [p. 24 of separate], Pl. 6 [ref. 4227]. •Valid as Hypostomus tenuicauda (Steindachner 1878) -- (Isbrücker 1980:35 [ref. 2303], Burgess 1989:432 [ref. 12860], Isbrücker 2001:28, 31 [ref. 25653], Isbrücker 2002:19 [ref. 27178], Armbruster 2004:80 [ref. 27644]). •Valid as Squaliforma tenuicauda (Steindachner 1878) -- (Weber in Reis et al. 2003:368 [ref. 27061], Ferraris 2007:298 [ref. 29155]). •Valid as Isorineloricaria tenuicauda (Steindachner 1878) -- (Ray & Armbruster 2016:532 [ref. 34178], DoNascimiento et al. 2017:82 [ref. 35633]). Current status: Valid as Isorineloricaria tenuicauda (Steindachner 1878). Loricariidae: Hypostominae. Distribution: Magdalena River basin, Colombia. Habitat: freshwater.