Attonitus ephimeros Vari & Ortega, 2000

Family:  Characidae (Characins; tetras), subfamily: Stevardiinae
Max. size:  4.97 cm SL (male/unsexed)
Environment:  pelagic; freshwater
Distribution:  South America: Aguaytia and Pachitea rivers in the Ucayali River basin.
Diagnosis:  Dorsal soft rays (total): 10-10; Anal soft rays: 14-20. The lack of a dark humeral mark distinguishes Attonitus ephimeros from Attonitus irisae which has a distinct, vertically-elongate humeral bar. The presence on the body wall above the anal-fin base of a band of dark pigmentation which is distinctly wider over the second and third branched anal-fin rays and has a rounded anterior margin in Attonitus ephimeros separates that species from Attonitus bounites which lacks such pigmentation. Description: Dorsal-fin with 2 unbranched and 8 branched rays. Anal-fin with 3 unbranched and 14-17, typically 15-16, branched rays (Ref 53400).
Biology: 
IUCN Red List Status: Least Concern (LC); Date assessed: 21 April 2014 Ref. (130435)
Threat to humans:  harmless


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