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Siluriformes (Catfishes) >
Heptapteridae (Three-barbeled catfishes)
Etymology: Imparfinis: Latin, impar = unequal + Greek, finis, pinna = wing, fin (Ref. 45335).
More on author: Lütken.
Environment: milieu / climate zone / depth range / distribution range
Ecology
Freshwater; demersal; pH range: 6.0 - 7.0; dH range: 15 - ?. Tropical; 24°C - 28°C (Ref. 2059)
South America: Upper São Francisco River basin, Brazil.
Size / Weight / Age
Maturity: Lm ? range ? - ? cm
Max length : 12.0 cm SL male/unsexed; (Ref. 27188)
Frequently occur in large rivers with strong currents, in association with Heptapterus longior (Ref. 27188), Pimelodella, Hemiancistrus, Lasiancistrus, Lithoxus, Characidium and Leporinus granti. Are more or less cave-dwellers, their reproduction is seasonal and sex determination type ZZ/ZW (heterogametic female) (Ref. 35381)
Life cycle and mating behavior
Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae
Bockmann, F.A. and G.M. Guazzelli, 2003. Heptapteridae (Heptapterids). p. 406-431. 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. 36914)
IUCN Red List Status (Ref. 130435: Version 2025-2)
Threat to humans
Harmless
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