undecimalis, Chaetostomus Steindachner [F.] 1878:90 [Anzeiger der Kaiserlichen Akademie der Wissenschaften, Wien, Mathematisch-Naturwissenschaftliche Classe v. 15 (no. 12) (for 9 May 1878); ref. 20476] Cienaga Grande de Santa Marta, Magdalena basin, 40 kilometers east of Barranquilla, Colombia. Lectotype: NMW 47224. Paralectotypes: NMW 47220-22 (2, 1, 1). Type catalog: Ferraris 2007:292 [ref. 29155]. Original genus is correctly Chaetostoma. Species later illustrated and described in more detail in Steindachner 1879:43 [p. 27 of separate], Pl. 8 [ref. 4227]. Lectotype selected by Weber 1992:26 [ref. 19714]. •Valid as Pterygoplichthys undecimalis (Steindachner 1878) -- (Isbrücker 1980:42 [ref. 2303], Burgess 1989:433 [ref. 12860], Weber 1991:642 [ref. 19114], Weber 1992:5, 26 [ref. 19714], Galvis et al. 1997:96 [ref. 23651], Isbrücker 2001:26, 32 [ref. 25653], Isbrücker 2002:28 [ref. 27178], Weber in Reis et al. 2003:366 [ref. 27061], Armbruster & Page 2006:403 [ref. 28898], Ferraris 2007:292 [ref. 29155], DoNascimiento et al. 2017:82 [ref. 35633], Agudelo-Zamora et al. 2020:106 [ref. 37968]). Current status: Valid as Pterygoplichthys undecimalis (Steindachner 1878). Loricariidae: Hypostominae. Distribution: South America: Magdalena, Cauca and Catatumbo River basins (Colombia). Habitat: freshwater.