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Actinopterygii (ray-finned fishes) > Characiformes (Characins) > Characidae (Characins) > Incertae sedis
Etymology: Astyanax: The name of Astyanax, Hector´s son in the Greek mithology (Ref. 45335); dissimilis: From the Latin 'dissimile' meaning not similar, in allusion to the differences of this species in relation to its congeners.

Environment / Climate / Range Ecology

Freshwater; benthopelagic. Tropical, preferred ?

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South America: widespread in Iguaçu basin, Brazil.

Size / Weight / Age

Maturity: L_m ? range ? - ? cm
Max length : 13.6 cm SL male/unsexed; (Ref. 85756)

Short description Morphology | Morphometrics

Dorsal soft rays (total): 8-9; Anal soft rays: 16 - 21. This species is distinguished from all its congeners from the Iguaçu basin by the following set of characters: infraorbital 3 not in contact with pre-opercle, leaving a naked area corresponding to approximately 1/5-1/4 the height of infraorbital 3; premaxillary external series with 2-5, usually 4 tricuspid teeth; non-symphysal teeth in premaxillary internal series with 5 cusps forming an arch in ventral view; maxillary with 0-3, usually 1 tooth; faint, narrow and elongate vertical humeral bar present (Ref. 85756).

Life cycle and mating behavior Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae

Main reference Upload your references | References | Coordinator | Collaborators

Garavello, J.C.I. and F.A.A. Sampaio, 2010. Five new species of genus Astyanax Baird & Girard, 1854 from Rio Iguaçu, Paraná, Brazil (Ostariophysi, Characiformes, Characidae). Brazilian Journal of Biology 70(3):847-865. (Ref. 85756)

IUCN Red List Status (Ref. 109396)

Not Evaluated

CITES (Ref. 94142)

Not Evaluated

Threat to humans

Harmless

Human uses

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Estimates of some properties based on models

Phylogenetic diversity index (Ref. 82805): PD₅₀ = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].

Bayesian length-weight: a=0.01230 (0.00551 - 0.02747), b=3.08 (2.89 - 3.27), based on LWR estimates for this (Sub)family-body shape (Ref. 93245).

Trophic Level (Ref. 69278): 2.7 ±0.3 se; Based on size and trophs of closest relatives

Resilience (Ref. 69278): .

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

Entered by Torres, Armi G.

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Astyanax dissimilis Garavello & Sampaio, 2010