Pimelodus britskii

(fig 1) was captured in the Arroyo Verde (figs 2, 3), which here has a variable depth averaging about 80 cm, the bottom is composed of mud, sand and mostly stones, and the stream has falls and pools with clear rapidly flowing water. Some areas have scarce submerged vegetation.

Pimelodus britskii is easily distinguished by having circular dark brown blotches usually smaller than one orbital diameter regularly scattered along the trunk, body depth at posterior cleithral process greater than head length, and maxillary barbels reaching or surpassing vertical drawn through median of adipose fin.

All these characters are present in the specimen captured in the Arroyo Verde (MACN-Ict 9265), Argentina, Misiones province, río Iguazú basin, Arroyo Verde, (25º40’15.7”S- 53º55’ 58.7”W, coll: Rican et al., November 2007).