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Characiformes (Characins) >
Hemiodontidae (Halftooths)
Etymology: Bivibranchia: Latin, bivium = a place where two ways meet; from Latin bi = two + latin, via = way; having or offering two ways; 1877 + Greek, brangchia = gills (Ref. 45335).
Eponymy: Henry Weed Fowler (1878–1965) was an American herpetologist, ornithologist, ichthyologist and artist. [...] (Ref. 128868), visit book page.
More on author: Steindachner.
Issue
No recent work; see Eigenmann (1912: 259) for description.
Environment: milieu / climate zone / depth range / distribution range
Ecology
Freshwater; benthopelagic; pH range: 5.5 - 7.6; dH range: ? - 25. Tropical; 22°C - 28°C (Ref. 2060)
South America: Negro, Tocantins, Xingu, Tapajós, Madeira, Essequibo, and Orinoco River basins.
Size / Weight / Age
Maturity: Lm ?  range ? - ? cm
Max length : 19.2 cm TL male/unsexed; (Ref. 111518); max. published weight: 68.00 g (Ref. 111518)
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 2024-1)
Threat to humans
Harmless
Human uses
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Internet sources
Estimates based on models
Phylogenetic diversity index (Ref.
82804): PD
50 = 0.5312 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00589 (0.00338 - 0.01026), b=3.20 (3.04 - 3.36), in cm total length, based on LWR estimates for this species & (Sub)family-body (Ref.
93245).
Trophic level (Ref.
69278): 2.9 ±0.4 se; based on size and trophs of closest relatives
Fishing Vulnerability (Ref.
59153): Low vulnerability (10 of 100).