minimus, Acestrorhynchus Menezes [N. A.] 1969:78, 120, Fig. 60 [Arquivos de Zoologia (São Paulo) v. 18 (nos 1-2); ref. 7834] Lago Jacaré, Rio Trombetas, Amazon River basin, Brazil. Holotype: DZSASP 4608. Paratypes: (57) ANSP 71080 (1); DZSASP 4609 (1); MCZ 20528 (12), 20532 (15), 20554 (1), 20560 (3), 20585 (2), 20589 (1), 20591 (13), 20594 (1), 20598 (4), 46004 (1). Type catalog: Böhlke 1984:51 [ref. 13621], Oyakawa 1996:448-449 [ref. 23140]. •Valid as Acestrorhynchus minimus Menezes 1969 -- (Menezes & Géry 1983:592 [ref. 8307], Chang & Ortega 1995:2 [ref. 24302], Menezes in Reis et al. 2003:232 [ref. 27061], López-Fernández & Winemiller 2003:204 [ref. 27386], Toledo-Piza 2007:755 [ref. 29426], Barriga Salazar 2014:109 [ref. 35745] as cf. minimus, Sarmiento et al. 2014:183 [ref. 35004], DoNascimiento et al. 2017:45 [ref. 35633], Meza-Vargas et al. 2021:15 [ref. 39298], Taphorn et al. 2022:10 [ref. 41297]). Current status: Valid as Acestrorhynchus minimus Menezes 1969. Acestrorhynchidae: Acestrorhynchinae. Distribution: South America: Amazon and Orinoco River basins (Bolivia, Brazil, Brazil-Colombian border, ?Ecuador, French Guiana, Guyana, Peru, Suriname and Venezuela). Habitat: freshwater.