Fishes from the Tirimbina Biological Reserve, La Virgen de Sarapiquí, Heredia, Costa Rica Author Angulo, Arturo Author Naranjo-Elizondo, Beatriz Author Rojas, Emmanuel Author Ley-López, Juan Manuel text Check List 2017 2017-10-27 13 5 683 702 http://dx.doi.org/10.15560/13.5.683 journal article 10.15560/13.5.683 1809-127X (5) Brycon costaricensis Angulo and Gracian-Negrete 2013: 258 ; Machaca (En/Sp) Figure 2E Body elongate, robust, fusiform; snout length usually shorter than the eye diameter; upper jaw in advance of Figure 2. Species of the Characiformes in the TBR. A. Astyanax bransfordii ( Gill, 1877 , upper: adult specimen, about 105 mm SL, lower: detail of the snout (elongate and with unicuspid teeth). B. Astyanax nicaraguensis Eigenmann & Ogle,1907 , upper: adult specimen, about 100 mm SL,lower: adult specimen,about 80 mm SL. C. Eretmobrycon scleroparius ( Regan, 1908 ) , upper: adult specimen,about 65 mm SL,lower:adult specimen, about 95 mm SL. D. Roeboides bouchellei Fowler, 1923 ,upper: juvenile specimen, about 42 mm SL, middle:adult specimen,about 85 mm SL, lower: adult specimen, about 93 mm SL. E. Brycon costaricensis Angulo & Gracian-Negrete, 2013 , upper: juvenile specimen, about 120 mm SL, middle: adult specimen, about 190 mm SL, lower: detail of the snout (upper jaw in advance of lower jaw). lower jaw; upper jaw with 3 or 4 rows of teeth; premaxillary teeth multicuspid, usually not enlarged; nape usually convex or straight; fins without strong spines; a single dorsal fin; adipose fin present, its base shorter than the base of the dorsal fin; caudal fin forked; general color- ation silvery, olive dorsally (more prominent in larger specimens) and white ventrally; fins usually transparent, pinkish or yellowish in some specimens (specially the dorsal and caudal fins); maximum body length ca 500 mm SL.