Astyanax dissimilis Garavello & Sampaio, 2010

Family:  Characidae (Characins; tetras), subfamily: Stethaprioninae
Max. size:  13.58 cm SL (male/unsexed)
Environment:  benthopelagic; freshwater
Distribution:  South America: widespread in Iguaçu basin, Brazil.
Diagnosis:  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).
Biology: 
IUCN Red List Status: Least Concern (LC); Date assessed: 07 November 2018 Ref. (130435)
Threat to humans:  harmless


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