Issue
See Vari (1982: 188) for a detailed description; synonymy above is based on personal observation and examination of types. Lectotype of H. argenteus by present designation.
Environment: milieu / climate zone / depth range / distribution range
Ecology
Freshwater; benthopelagic. Tropical
South America: Orinoco River basin; Japurá, Jutai, Negro, Tapajós, and Uatumã River basins; Rupununi, Corantijn, Itapecuru, and Mearim River basins.
Size / Weight / Age
Maturity: Lm ?  range ? - ? cm
Max length : 23.7 cm SL male/unsexed; (Ref. 38289)
Life cycle and mating behavior
Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae
Distinct pairing (Ref. 205).
Langeani, F., 2003. Hemiodontidae (Hemiodontids). p. 96-100. In R.E. Reis, S.O. Kullander and C.J. Ferraris, Jr. (eds.) Checklist of the Freshwater Fishes of South and Central America. Porto Alegre: EDIPUCRS, Brasil. (Ref. 38289)
IUCN Red List Status (Ref. 130435: Version 2025-2)
Threat to humans
Harmless
Human uses
Fisheries: minor commercial
Tools
Special reports
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Internet sources