Rineloricaria catamarcensis (Berg 1895)

Material examined. 7 exemplars; 51.7 - 76.7 mm SL. CI FML 7834, 1 ex, 27° 19’ 07.5”S, 65° 41’ 51.2”W Jaya River. CI FML 7923, 6 ex, 27°12’ 36.21”S; 65°37’ 22.80”W Pueblo Viejo River .

Identification. Body and caudal peduncle greatly depressed; pointed snout; depressed caudal peduncle; abdomen completely covered by plates, but not forming regular series; dorsal margin of orbit markedly elevated; triangular and well-developed postorbital notch; undivided lips with short barbels; without adipose fin; pectoral fin barely surpasses ventral-fin origin; pectoral spines similar to the first pectoral ray; upper caudal-fin ray prolonged into a filament (Alcaraz et al., 2011; Liotta, 2016).