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Characiformes (Characins) >
Stevardiidae (Stevardiids) > Diapominae
Etymology: Knodus: Greek, knodon, -ontos = knife, sword (Ref. 45335); weitzmani: Named for Stanley H. Weitzman for his outstanding contribution to the knowledge of neotropical freshwater fishes.
Miljö: miljö / Klimatzon / djupintervall / distributionsområde
Ekologi
; sötvatten bentopelagisk. Tropical
South America: Rio Curuá, a tributary of rio Iriri, rio Xingu basin in Brazil.
Storlek / Vikt / Ålder
Könsmognad: Lm ?  range ? - ? cm
Max length : 4.1 cm SL hane/ej könsbestämd; (Ref. 81197)
Kort beskrivning
Bestämningsnycklar | Morfologi | Morfometri
Mjukstrålar i ryggfenan (totalt) : 10; Mjukstrålar i analfenan: 21 - 23; Ryggkotor: 36 - 38. A conspicuous dark blotch present at the humeral region. Scales rows between dorsal-fin origin and anal-fin origin 7-8. Mature males with anal-fin gland cup-shaped, its lower part much more developed than the upper (Ref. 81197).
Occurs in clear water rocky rapids, with thick sand on the bottom. Forms small schools of about 10-15 individuals actively swimming against fast flowing waters below a one meter high fall (Ref. 81197).
Livscykel och parningsbeteende
Könsmognad | Reproduktion | Lek | Ägg | Fekunditet | Larver
Menezes, N.A., A.L. Netto-Ferreira and K.M. Ferreira, 2009. A new species of Bryconadenos (Characiformes: Characidae) from the rio Curuá, rio Xingu drainage, Brazil. Neotrop. Ichthyol. 7(2):147-152. (Ref. 81197)
Status på IUCN:s rödlista (Ref. 130435: Version 2025-2 (Global))
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Harmless
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Uppskattningar baserade på modeller
Index för fylogenetisk mångfald (Ref.
82804): PD
50 = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01259 (0.00546 - 0.02901), b=3.01 (2.82 - 3.20), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref.
93245).
Trofisk nivå (Ref.
69278): 3.2 ±0.4 se; based on size and trophs of closest relatives
Sårbarhet i fisket (Ref.
59153): Low vulnerability (10 of 100).
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