Pimelodella laticeps Eigenmann 1917

Material examined. 1 exemplar. 62.7 mm SL. Cl FML 7821, 1 ex, 27° 12’ 29.6”S, 65° 37’ 39.2”W Pueblo Viejo River.

Identification. Postcleithral process as a spine-shaped projection; bases of mentonian barbels located in straight line; short adipose fin 25.0-30.3 % of SL; lobes of the caudal fin equal; developed pectoral and dorsal spines; background color gray with dark band on the midline of flank; area behind operculum with a leaden spot, a dark spot in front of dorsal fin and another in front of adipose fin; dorsal fin dark, with a middle hyaline band; rest of fins hyaline with few scattered chromatophores on rays and membranes (Almirón et al., 2015).