Please look in Eschmeyer's Catalog of Fishes for authorships of sections, Families of Fishes (all), and related information.

Species in the genus Hydrolycus: [ 6 ] records

armatus, Hydrocyon Jardine [W.] in Schomburgk 1841:249, Pl. 25 [The Natural history of fishes of Guiana Part I; ref. 18707] Sandbars in vicinity of Maipuri campsite, 4°34'N, 58°35'W, Essequibo River, Guyana. Neotype: ANSP 175725. Book contains 2 plates numbered 25, both of which are identified as Hydrocyon armatus. Neotype designated by Toledo-Piza et al. 1999:273 [ref. 24227]. •Valid as Hydrolycus armatus (Jardine 1841) -- (Toledo-Piza et al. 1999:267 [ref. 24227], Toledo-Piza in Reis et al. 2003:235 [ref. 27061], Sarmiento et al. 2014:67, 186 [ref. 35004], DoNascimiento et al. 2017:36 [ref. 35633], Urbano-Bonilla et al. 2018:83 [ref. 35773], Koerber et al. 2022:17 [ref. 39235], Taphorn et al. 2022:23 [ref. 41297]). Current status: Valid as Hydrolycus armatus (Jardine 1841). Cynodontidae. Distribution: South America: Amazon and Orinoco River basins and rivers of Guyana (Brazil, Bolivia, Colombia, Guyana and Venezuela). Habitat: freshwater.

pectoralis, Cynodon Günther [A.] 1866:30 [Annals and Magazine of Natural History (Series 3) v. 18 (no. 103) (art. 7); ref. 18187] Upper Amazon River, Brazil. Holotype (unique): BMNH 1866.2.15.22. •Valid as Hydrolycus pectoralis (Günther 1866) -- (Ortega & Vari 1986:10 [ref. 9708], Taphorn 1992:433 [ref. 23654]). •Synonym of Hydrolycus scomberoides (Cuvier 1819) -- (Toledo-Piza et al. 1999:274 [ref. 24227], Toledo-Piza in Reis et al. 2003:235 [ref. 27061], Toledo-Piza 2024:332 [ref. 40817]). Current status: Synonym of Hydrolycus scomberoides (Cuvier 1819). Cynodontidae. Habitat: freshwater.

scomberoides, Hydrocynus Cuvier [G.] 1816:168 [Le Règne Animal; ref. 993] See Hydrocyon scomberoides Cuvier 1819. On Official List ICZN. •Not available -- (Toledo-Piza et al. 1999:277 [ref. 24227]). Suppressed. Current status: Synonym of Hydrolycus scomberoides (Cuvier 1819). Cynodontidae.

scomberoides, Hydrocyon Cuvier [G.] 1819:357, Pl. 27 (fig. 2) [Mémoires du Muséum National d'Histoire Naturelle, Paris (N. S.) (Série A) Zoologie v. 5; ref. 1017] Brazil. Holotype (unique): MNHN A-8659. Cuvier specimens: MNHN 0000-1713 (1), A-8549 (1, dry), A-9854 (1). Type catalog: Bertin 1948:8 [ref. 19577]. Appeared first in Cuvier 1816:168 [ref. 993] as Hydocynus scomberoides, but species dates to Cuvier 1819 as above after that name and date was placed on the Official List in Opinion1581(see Toledo-Piza et al. 1999:277 [ref. 24227]); lectotype designation by Eschmeyer 1998:1527 unneeded; both descriptions apparently based on same specimen. •Valid as Hydrolycus scomberoides (Cuvier 1819) -- (Ortega & Vari 1986:10 [ref. 9708], Taphorn 1992:433 [ref. 23654], Toledo-Piza et al. 1999:273 [ref. 24227], Toledo-Piza in Reis et al. 2003:235 [ref. 27061] dating to 1816, Barriga Salazar 2014:109 [ref. 35745], Sarmiento et al. 2014:67, 186 [ref. 35004], DoNascimiento et al. 2017:36 [ref. 35633], Meza-Vargas et al. 2021:15 [ref. 39298], Chuctaya et al. 2022:27 [ref. 42137], Taphorn et al. 2022:23 [ref. 41297], Toledo-Piza 2024:332 [ref. 40817]). Current status: Valid as Hydrolycus scomberoides (Cuvier 1819). Cynodontidae. Distribution: South America: Amazon River basin (Bolivia, Colombia, Ecuador, Guyana and Peru). IUCN (2023): Least Concern. Habitat: freshwater.

tatauaia, Hydrolycus Toledo-Piza [M.], Menezes [N. A.] & Santos [G. M. dos] 1999:263, Figs. 7-8 [Ichthyological Exploration of Freshwaters v. 10 (no. 3); ref. 24227] Rio Xingu, Belo Monte, 3°10'S, 51°50'W, Pará, Brazil. Holotype: MZUSP 48005. Paratypes: AMNH 223196 (3), BMNH 1997.11.13.1-3 (3), CAS 97484 (3), INPA 13275 (3), MCP 20446 (3), MNRJ 16464 (3), MZUSP 52449 (5), USNM 346867 (3); plus non-type material. •Valid as Hydrolycus tatauaia Toledo-Piza, Menezes & Santos 1999 -- (Toledo-Piza in Reis et al. 2003:235 [ref. 27061], DoNascimiento et al. 2017:36 [ref. 35633], Meza-Vargas et al. 2021:15 [ref. 39298], Chuctaya et al. 2022:27 [ref. 42137], Taphorn et al. 2022:23 [ref. 41297]). Current status: Valid as Hydrolycus tatauaia Toledo-Piza, Menezes & Santos 1999. Cynodontidae. Distribution: South America: Amazon and upper Orinoco River basins and riverso of Guyana (Brazil, Colombia, Guyana, Peru and Venezuela). IUCN (2023): Least Concern. Habitat: freshwater.

wallacei, Hydrolycus Toledo-Piza [M.], Menezes [N. A.] & Santos [G. M. dos] 1999:259, Figs. 1a, 2-3 [Ichthyological Exploration of Freshwaters v. 10 (no. 3); ref. 24227] Rio Negro, Mandiquié, 0°30'S, 64°30'W, Amazonas, Brazil. Holotype: MZUSP 32645. Paratypes: AMNH 223197 (3), BMNH 1997.11.13.4-6 (3), CAS 97483 (3), INPA 13274 (3), MCP 20445 (3), MNRJ 16463 (3), MZUSP 52448 (13), USNM 346866 (3); plus non-type material. •Valid as Hydrolycus wallacei Toledo-Piza, Menezes & Santos 1999 -- (Toledo-Piza in Reis et al. 2003:235 [ref. 27061], DoNascimiento et al. 2017:36 [ref. 35633], Silvano et al. 2020:117 [ref. 38133], Urbano-Bonilla et al. 2024:138 [ref. 42338]). Current status: Valid as Hydrolycus wallacei Toledo-Piza, Menezes & Santos 1999. Cynodontidae. Distribution: South America: Amazon River basin and Orinoco River basins (Brazil, Venezuela and Colombia). Habitat: freshwater.