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Teleostei (teleosts) > Characiformes (Characins) > Characidae (Characins; tetras) > Stethaprioninae
Etymology: Astyanax: The name of Astyanax, Hector´s son in the Greek mythology (Ref. 45335); microschemos: From the Greek mikroschemos, meaning low stature, in reference to the shallow body depth of the species.
Eponymy: Astyanax was the son of Hector in Greek mythology. See Homer’s Iliad for details. The reasoning for its use for a genus of characins is not explained. (Ref. 128868), visit book page.

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

Freshwater; benthopelagic. Tropical

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South America: Rio Itapemirim drainage in Espirito Santo State, Brazil.

Size / Weight / Age

Maturity: L_m ? range ? - ? cm
Max length : 5.5 cm SL male/unsexed; (Ref. 57404)

Short description Identification keys | Morphology | Morphometrics

Vertebrae: 35 - 36. A member of the Astyanax scabripinnis species complex that distinguishes from species outside this complex by having anal fin with 14-18 branched rays and body depth shallow (26.9-29.7% of SL). Differs from other species of the species complex by its shallow body depth (26.9-29.7% SL) and the smaller interorbital width (26.9-30.4% HL) (Ref. 57404).

The type locality is about 2 m wide brook with clear water, segments with rapids, riparian vegetation and a substrate of stones and rocks; associated with Characidium sp., Neoplecostomus sp. and Trichomycterus sp. (Ref. 57404).

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

Main reference Upload your references | References | Coordinator | Collaborators

Bertaco, V.A. and C.A.S. de Lucena, 2006. Two new species of Astyanax (Ostariophysi: Characiformes: Characidae) from eastern Brazil, with a synopsis of the Astyanax scabripinnis species complex. Neotrop. Ichthyol. 4(1):53-60. (Ref. 57404)

IUCN Red List Status (Ref. 130435: Version 2024-2)

Least Concern (LC) ; Date assessed: 07 November 2018

CITES

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Threat to humans

Harmless

Human uses

Fisheries: of no interest

FAO - Publication: search | FishSource |

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Estimates based on models

Phylogenetic diversity index (Ref. 82804): PD₅₀ = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].

Bayesian length-weight: a=0.01096 (0.00493 - 0.02437), b=3.10 (2.93 - 3.27), in cm total length, based on LWR estimates for this Genus-body shape (Ref. 93245).

Trophic level (Ref. 69278): 2.9 ±0.4 se; based on size and trophs of closest relatives

Resilience (Ref. 120179): High, minimum population doubling time less than 15 months (Preliminary K or Fecundity.).

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

Astyanax microschemos Bertaco & Lucena, 2006