incognitum, Hypoptopoma Aquino [A. E.] & Schaefer [S. A.] 2010:70, Fig. 36 [Bulletin of the American Museum of Natural History No. 336; ref. 30875] Río Itenez, opposite to Costa Marques, Beni, Bolivia. Holotype: AMNH 39759. Paratypes: AMNH 241976 (19, 2 c&s); UMMZ 204339 (16, 3 c&s). Plus non-type material. •Valid as Hypoptopoma incognitum Aquino & Schaefer 2010 -- (Sarmiento et al. 2014:162, 191 [ref. 35004], Delapieve et al. 2018:22 [ref. 35713], Koerber et al. 2022:50 [ref. 39235], Vieira et al. 2023:20 [ref. 40759]). Current status: Valid as Hypoptopoma incognitum Aquino & Schaefer 2010. Loricariidae: Hypoptopomatinae. Distribution: South America: widespread across central and lower Rio Amazonas basin (Bolivia and Brazil). Habitat: freshwater.