Characidium heirmostigmata Graça & Pavanelli, 2008 (fig. 2)

Morphometric data are given in table 1. Premaxillary teeth 7-8; dentary teeth 5-8. Lateral line scales 33- 34. Scale rows above lateral line 4 and below 3. Scales in predorsal series 9-11. Scales around caudal peduncle 12. Dorsal-fin rays iii,9-iv9. Pectoral-fin rays iii,9-iii,10. Anal-fin rays ii, 6-iii,6.

Characidium heirmostigmata is only known from tributaries of the rio Ivai, upper rio Paraná basin in Paraná state, Brazil. We found specimens of Characidium heirmostigmata in the arroyo Garuhapé, middle río Paraná basin, Misiones Province Argentina (fig. 1).

Material examined: MLP 10750, 6 ex., 52.0- 54.5 mm SL, río Paraná basin, Misiones Province, arroyo Garuhapé (26°53'02.1" S, 54°53'32.6" W), December 2007 .