Klassificering / Namn
Populärnamn | synonymer | Catalog of Fishes(Släkte, Arter) | ITIS | CoL | WoRMS | Cloffa
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Characiformes (Characins) >
Acestrorhamphidae (American tetras) > Pristellinae
Etymology: Hemigrammus: Greek, hemi = half + Greek, gramma = letter, signal (Ref. 45335); ataktos: From the Greek adjective ataktos, meaning disordered or irregular, in allusion to the variation in the perforation of lateral-line scales present in the new species.
Miljö: miljö / Klimatzon / djupintervall / distributionsområde
Ekologi
; sötvatten bentopelagisk. Tropical
South America: Ro Tocantins basin in Brazil.
Storlek / Vikt / Ålder
Könsmognad: Lm ?  range ? - ? cm
Max length : 3.8 cm SL hane/ej könsbestämd; (Ref. 96858)
Kort beskrivning
Bestämningsnycklar | Morfologi | Morfometri
Mjukstrålar i ryggfenan (totalt) : 11 - 12; Ryggkotor: 33 - 34. The unique color pattern of the body consisting of a black midlateral stripe which extends from the posterior margin of the eye to the median caudal-fin rays distinguishes Hemigrammus ataktos from all congeners which possess dark stripe or thin line extending approximately from the humeral blotch or from the vertical through dorsal-fin origin to the caudal fin. It differs also from all congeners, except H. filamentosus Zarske, by having elongated anteriormost portions of the dorsal, pelvic, and anal fins in mature males (Ref. 96858).
Body shape (shape guide): elongated.
Livscykel och parningsbeteende
Könsmognad | Reproduktion | Lek | Ägg | Fekunditet | Larver
Marinho, M.M.F., F.C.P. Dagosta and J.L.O. Birindelli, 2014. Hemigrammus ataktos: a new species from the rio Tocantins basin, central Brazil (Characiformes: Characidae). Neotrop. Ichthyol. 12(2):257-264. (Ref. 96858)
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) |
PD50 = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high]. |
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Bayesian length-weight
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a=0.00589 (0.00226 - 0.01533), b=3.16 (2.94 - 3.38), 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 |
Resiliens (Ref. 120179) |
Hög, lägsta populationsfördubblingstid mindre än 15 månader (Preliminary K or Fecundity.). |
Sårbarhet i fisket (Ref. 59153) |
Low vulnerability (10 of 100). 🛈 |