Astyanax microschemos Bertaco & Lucena, 2006

Family:  Characidae (Characins; tetras), subfamily: Stethaprioninae
Max. size:  5.51 cm SL (male/unsexed)
Environment:  benthopelagic; freshwater
Distribution:  South America: Rio Itapemirim drainage in Espirito Santo State, Brazil.
Diagnosis:  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). Description: D. 11,9; A. iv-v,15-17; P. i,11-13; V. i,7 (Ref. 57404).
Biology:  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).
IUCN Red List Status: Least Concern (LC); Date assessed: 07 November 2018 Ref. (130435)
Threat to humans:  harmless


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