castelnaui, Hemiancistrus Miranda Ribeiro [A. de] 1911:58 [Arquivos do Museu Nacional de Rio de Janeiro v. 16; ref. 3716] Río Ucayali, Peru. Type catalog: Ferraris 2007:265 [ref. 29155]. Replacement name for Hypostomus pictus Castelnau 1855, secondarily preoccupied in Hemiancistrus by Ancistrus pictus Kner 1854. Lasiancistrus castelnaui should be used as valid since the replacement of the secondary junior homonym pictus happened before 1961 (see Art. 59.3 of the Code). However, castelnaui has been found to be a synonym of schomburgkii (Günther 1864). •Valid as Lasiancistrus castelnaui (Miranda Ribeiro 1911) -- (Isbrücker 2001:27, 29 [ref. 25653], Isbrücker 2002:20 [ref. 27178], Fisch-Muller in Reis et al. 2003:387 [ref. 27061]). •Synonym of Lasiancistrus schomburgkii (Günther 1864) -- (Armbruster 2005:561 [ref. 28554], Ferraris 2007:265 [ref. 29155], Armbruster 2015:99 [ref. 33670]). Replacement Name. Current status: Synonym of Lasiancistrus schomburgkii (Günther 1864). Loricariidae: Hypostominae. Habitat: freshwater.