Actinopteri (ray-finned fishes) > Siluriformes
(Catfishes) > Heptapteridae
Etymology: Pariolius: Greek, pareia = jaw + Greek, leios = smooth (Ref. 45335).
More on author: Cope.
Environment: milieu / climate zone / depth range / distribution range
Freshwater; demersal. Tropical
South America: Upper Amazon River basin in Brazil and Peru.
Size / Weight / Age
Maturity: Lm ?  range ? - ? cm
Max length : 3.2 cm SL male/unsexed; (Ref. 36914)
Inhabits sand and gravel bottoms of creeks of relatively fast flowing water as well as sluggish waters of the same streams where aquatic vegetation is lacking. Feeds mainly on Trichoptera larvae.
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. 125652)
Threat to humans
Common namesSynonymsMetabolismPredatorsEcotoxicologyReproductionMaturitySpawningSpawning aggregationFecundityEggsEgg development
ReferencesAquacultureAquaculture profileStrainsGeneticsAllele frequenciesHeritabilityDiseasesProcessingNutrientsMass conversion
Estimates based on models
Phylogenetic diversity index (Ref. 82804
= 1.0000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01230 (0.00402 - 0.03768), b=2.99 (2.74 - 3.24), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245
Trophic level (Ref. 69278
): 3.2 ±0.40 se; based on food items.
Fishing Vulnerability (Ref. 59153
): Low vulnerability (10 of 100).