penak, Akawaio Maldonado-Ocampo [J. A.], López-Fernández [H.], et al. 2014:27, Figs. 1-4 [Zoologica Scripta v. 43 (no. 1); ref. 32878] Zone 7, Kamarang, Mazaruni River, 5°56'10.1"N, 60°36'53.8"W, Guyana. Holotype: CSBD 1654. Paratypes: ANSP [ex ROM 89554], ROM. Type catalog: Ferraris et al. 2017:[21] [ref. 35236]. •Valid as Akawaio penak Maldonado-Ocampo, López-Fernández, Taphorn, Bernard, Crampton & Lovejoy 2014 -- (Reis et al. 2016:15 [ref. 34496], Ferraris et al. 2017:[21] [ref. 35236], Taphorn et al. 2022:39 [ref. 41297]). Current status: Valid as Akawaio penak Maldonado-Ocampo, López-Fernández, Taphorn, Bernard, Crampton & Lovejoy 2014. Hypopomidae. Distribution: South America: Mazaruni River (Guyana) endemic. Habitat: freshwater.