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Characiformes (Characins) >
Crenuchidae (South American darters) > Characidiinae
Etymology: Characidium: Diminutive of Charax, -akos = a fish without identification (Ref. 45335); dumonti: Name 'dumonti' in honor of lberto SantosDumont, the father of aviation, who visited Iguaçu Falls and help establish the Iguaçu National Park.
Environnement : milieu / zone climatique / profondeur / gamme de distribution
Écologie
; eau douce benthopélagique. Tropical
South America: Brazil.
Taille / Poids / Âge
Maturité: Lm ?  range ? - ? cm
Max length : 5.6 cm SL mâle / non sexé; (Ref. 137999)
Description synthétique
Clés d'identification | Morphologie | Morphométrie
Rayons mous dorsaux (Total) : 11; Rayons mous anaux: 8 - 9. This species is distinguished from its congeners by the following set of characters: conspicuous dark-brown vertical bars present, blotches and spots along the sides of body; scaled isthmus; adipose fin present; five scales series below lateral line present; thin dark midlateral stripe present, occupying half scale height in vertical through dorsal-fin origin and one scale height on caudal peduncle; reticulated colour pattern present, with melanophores along the posterior edge of the scales; dorsal and pelvic-fin height, 19.1%-23.7% and 12.1%-18.1% of Ls and predorsal distance 44.5%-48.0% of Ls (137999).
Body shape (shape guide): elongated; Cross section: oval.
This species inhabits a fast-flowing stream with a substrate composed of rocks and pebbles of varying sizes over sandy soil.
Cycle de vie et comportement reproducteur
Maturité | Reproduction | Frai | Œufs | Fécondité | Larves
Stabile, B.H.M., R.B. dos Reis, A.V. de Oliveira and W.J. da Graça, 2025. A new species of Characidium (Characiformes: Crenuchidae) from the Iguaçu National Park, Rio Iguaçu basin, Paraná, Brazil. J Fish Biol. 107:454-465. (Ref. 137999)
Statut dans la liste rouge de l'IUCN (Ref. 130435: Version 2025-2 (Global))
Menace pour l'homme
Harmless
Utilisations par l'homme
Pêcheries: sans intérêt
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Sources Internet
Estimations basées sur des modèles
Indice de diversité phylogénétique (Réf.
82804): PD
50 = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01023 (0.00452 - 0.02316), b=3.07 (2.89 - 3.25), in cm total length, based on LWR estimates for this Genus-body shape (Ref.
93245).
Niveau trophique (Réf.
69278): 3.4 ±0.3 se; based on size and trophs of closest relatives
Vulnérabilité de la pêche (Ref.
59153): Low vulnerability (10 of 100).
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