Astyanax gymnogenys Eigenmann, 1911
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Family:  Characidae (Characins), subfamily: Incertae sedis
Max. size:  11.52 cm SL (male/unsexed)
Environment:  benthopelagic
Distribution:  South America: Iguaçu River basin.
Diagnosis:  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: 
IUCN Red List Status: Not Evaluated (N.E.) Ref. (120744)
Threat to humans:  harmless
Country info:   
 

Entered by: Casal, Christine Marie V. - 08.02.99
Modified by: Torres, Armi G. - 27.06.09

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