Hemibrycon divisorensis Bertaco, Malabarba, Hidalgo & Ortega, 2007

Bertaco, Vinicius A. & Malabarba, Luiz R., 2010, A review of the Cis-Andean species of Hemibrycon Günther (Teleostei: Characiformes: Characidae: Stevardiinae), with description of two new species, Neotropical Ichthyology 8 (4), pp. 737-770 : 766

Hemibrycon divisorensis Bertaco, Malabarba, Hidalgo & Ortega, 2007

Hemibrycon divisorensis was recently described by Bertaco et al. (2007), from the upper río Ucayali drainage, Peru, and only an updated diagnosis is presented here.

Diagnosis. Hemibrycon divisorensis is distinguished from its congeners by the presence of a wide black asymmetrical spot covering the base of caudal-fin rays and extending along entire length of caudal-fin rays 9 to 12-13 (except H. surinamensis ), and by the presence of a black band in the lower half of the caudal peduncle from the region above the last anal-fin rays to the caudal-fin base. Furthermore, it is distinguished from its Cis-Andean congeners by the number of scale rows below lateral line (4-5 vs. 5-9), except H. mikrostiktos and H. surinamensis . It differs from H. mikrostiktos by the number of branched anal-fin rays (24-30 vs. 18-21), and from H. surinamensis by the number of scale sheath along anal-fin base (17-22 vs. 12-17), and by the number of cusps in the inner row of the premaxilla teeth (5-7 vs. 4-5).