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> Characiformes (Characins) > Characidae (Characins; tetras) > Stevardiinae
Etymology: Knodus: Greek, knodon, -ontos = knife, sword (Ref. 45335); dorsomaculatus: Name from the words 'dorso' for dorsal and 'maculare' for spot, referring to the dark blotch on the dorsal fin rays.

Environment: milieu / climate zone / depth range / distribution range Ecologie

; zoet water benthopelagisch. Tropical

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South America: Teles Pires River, Tapajós River basin, Brazil.

Grootte / Gewicht / Leeftijd

Maturity: L_m ? range ? - ? cm
Max length : 4.8 cm SL mannelijk / geslacht onbekend; (Ref. 85071)

Korte beschrijving Determinatiesleutels | Morfologie | Morfometrie

Dorsale zachte stralen (totaal) : 9. This species is distinguished from all its congeners by the having a dark blotch on the base of the first five branched dorsal fin rays, ii,9 dorsal fin rays. It differs from K. pasco in having 2 teeth on the maxillary (vs. 5-6), 5 scale rows between the lateral line and dorsal fin origin (vs. 7) and by the 2-2.5 scale-wide dark longitudinal band from gill cover to the tips of middle caudal fin rays. It is further distinguished from all other Knodus species in its absence of a distinct dorsal fin blotch (except Knodus chapadae, Knodus meridae, Knodus mizquae, Knodus moenkhausii, Knodus savannensis, Knodus tiquiensis and Knodus victoriae, and by the distance from the snout tip to dorsal fin origin 46.8-49.2% (vs. 49.1-60.0% in all other species). The new species is distinguished from K. meridae, K. mizquae, K. savannensis, K. tiquiensis and K. victoriae by the dorsal fin base length (13·9–14·8% v., 7·7–13·5%). It differs further from K. chapadae and K. moenkhausii in having 7 cusps on the maxillary teeth (vs. 5) (Ref. 85071).

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Ferreira, K.M. and A.L. Netto-Ferreira, 2010. Knodus dorsomaculatus (Characiformes: Characidae), a new species from Teles Pires River, Tapajós River basin, Brazil. J. Fish Biol. 77(3):468-478. (Ref. 85071)

Status op de Rode Lijst van het IUCN (Ref. 130435: Version 2024-2)

Bedreigd (EN) (B1ab(i,iii,iv)); Date assessed: 18 May 2022

CITES

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Gevaar voor de mens

Harmless

Gebruik door de mens

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Estimates based on models

Fylogenetische diversiteitsindex (Ref. 82804): PD₅₀ = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].

Bayesian length-weight: a=0.00955 (0.00443 - 0.02057), b=3.06 (2.88 - 3.24), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245).

Trofisch niveau (Ref. 69278): 3.0 ±0.4 se; based on size and trophs of closest relatives

Fishing Vulnerability (Ref. 59153): Low vulnerability (10 of 100).

Knodus dorsomaculatus Ferreira & Netto-Ferreira, 2010