Astyanax gymnogenys

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Astyanax gymnogenys Eigenmann, 1911

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Astyanax gymnogenys
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Classification / Names Common names | Synonyms | Catalog of Fishes (gen., sp.) | ITIS | CoL | WoRMS | Cloffa

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).  More on author: Eigenmann.

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

Freshwater; benthopelagic.   Subtropical

Distribution Countries | FAO areas | Ecosystems | Occurrences | Point map | Introductions | Faunafri

South America: Iguaçu River basin.

Size / Weight / Age

Maturity: Lm ?  range ? - ? cm
Max length : 11.5 cm SL male/unsexed; (Ref. 81203)

Short description Morphology | Morphometrics

Anal soft rays: 21 - 22. This species is distinguished from its congeners from Rio Iguaçu by the combination of the following characters: narrow third infraorbital, leaving a broad naked area between its border and preopercle corresponding to approximately one third depth of the bone; 5 premaxillary large teeth in the inner series all in a straight line in ventral view; symphysal pair bicuspid; maxillary short in relation to premaxillary, with 1-3 teeth, forming a right angle with premaxillary when mouth is closed; all other premaxillary (both series) teeth and larger (anterior) dentary teeth tricuspid; first branchial arch with 6 gill-rakers in epibranchial and 10 or 11 in lower branch (ceratobranchial + hypobranchial); presence of a vertically elongated humeral dark brown blotch and a horizontally elongated dark caudal brown spot (Ref. 85756).

Biology     Glossary (e.g. epibenthic)

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

Main reference Upload your references | References | Coordinator | Collaborators

Lima, F.C.T., L.R. Malabarba, P.A. Buckup, J.F. Pezzi da Silva, R.P. Vari, A. Harold, R. Benine, O.T. Oyakawa, C.S. Pavanelli, N.A. Menezes, C.A.S. Lucena, M.C.S.L. Malabarba, Z.M.S. Lucena, R.E. Reis, F. Langeani, C. Moreira et al. …, 2003. Genera Incertae Sedis in Characidae. p. 106-168. In R.E. Reis, S.O. Kullander and C.J. Ferraris, Jr. (eds.) Checklist of the Freshwater Fishes of South and Central America. Porto Alegre: EDIPUCRS, Brasil. (Ref. 38376)

IUCN Red List Status (Ref. 120744)

  Not Evaluated 

CITES (Ref. 118484)

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Threat to humans

  Harmless





Human uses

FAO(Publication : search) | FishSource |

More information

Countries
FAO areas
Ecosystems
Occurrences
Introductions
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Ecology
Diet
Food items
Food consumption
Ration
Common names
Synonyms
Metabolism
Predators
Ecotoxicology
Reproduction
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Fecundity
Eggs
Egg development
Age/Size
Growth
Length-weight
Length-length
Length-frequencies
Morphometrics
Morphology
Larvae
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Stamps, Coins Misc.
Sounds
Ciguatera
Speed
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Otoliths
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Tools

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Summary page | Point data | Common names | Photos

Internet sources

Aquatic Commons | BHL | Cloffa | Websites from users | Check FishWatcher | CISTI | Catalog of Fishes (gen., sp.) | DiscoverLife | ECOTOX | Faunafri | Fishtrace | GenBank(genome, nucleotide) | GloBI | Google Books | Google Scholar | Google | IGFA World Record | MitoFish | Otolith Atlas of Taiwan Fishes | PubMed | Reef Life Survey | Tree of Life | Wikipedia(Go, Search) | World Records Freshwater Fishing | Zoobank | Zoological Record

Estimates based on models

Phylogenetic diversity index (Ref. 82805):  PD50 = 0.5000   [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01660 (0.00717 - 0.03842), b=3.05 (2.87 - 3.23), in cm Total Length, based on LWR estimates for this Genus-body shape (Ref. 93245).
Trophic Level (Ref. 69278):  2.8   ±0.4 se; Based on size and trophs of closest relatives
Resilience (Ref. 120179):  .
Vulnerability (Ref. 59153):  Low vulnerability (10 of 100) .