sidereus, Pseudancistrus Armbruster [J. W.] 2004:8, Fig. 3 [Zootaxa No. 628; ref. 27844] Río Siapa from 10-15 kilometers downstream, Río Casiquiare - Río Negro drainage, 01.50000°, -065.71667°, Río Orinoco drainage, Amazonas, Venezuela. Holotype: MCNG 26125. Paratypes: AUM 37562 (1), FMNH 105294 (4), MCNG 48261 (1, c&s). Type catalog: Ferraris 2007:288 [ref. 29155]. •Valid as Pseudancistrus sidereus Armbruster 2004 -- (Ferraris 2007:288 [ref. 29155], Willink et al. 2010:41 [ref. 30670]. Silva et al. 2014:18 [ref. 33302], DoNascimiento et al. 2017:81 [ref. 35633] as Pseudoancistrus). Current status: Valid as Pseudancistrus sidereus Armbruster 2004. Loricariidae: Hypostominae. Distribution: Casiquiare River drainage and the upper Orinoco River drainage, Amazonas, Venezuela and Colombia. Habitat: freshwater.