Odontostilbe microcephala Eigenmann 1907

Material examined. 110 exemplars; 34.9 - 52.4 mm SL. CI FML 7818, 2 ex, 27° 12’ 29.6”S, 65° 37’ 39.2”W Pueblo Viejo River. CI FML 7827, 6 ex, 27° 19’ 07.5”S, 65° 41’ 51.2” W Jaya River. CI FML 7853, 52 ex, 27° 19’ 07.5”S, 65° 41’ 51.2”W Jaya River. CI FML 7857, 29 ex, 27° 19’ 07.5”S, 65° 41’ 51.2”W Jaya River. CI FML 7885, 6 ex, 27° 19’ 07.5”S, 65° 41’ 51.2”W Jaya River. CI FML 7913, 10 ex, 27° 21’23.8” S, 65° 48’33.3”W Cochuna River. CI FML 7919, 8 ex, 27° 21’23.8” S, 65° 48’33.3” Cochuna River. CI FML 7927, 7 ex, 27°12’ 36.21”S; 65°37’ 22.80”O Pueblo Viejo River.

Identification. Lateral line with 35-37 pored scales; 6 scale rows between lateral line and dorsal-fin origin; horizontal orbit diameter of 24.6-32.8 % HL, mean 28.7%; one series of premaxillary teeth, all of them pedunculated; subterminal mouth; branched anal-fin rays 16-19 (Chuctaya et al., 2018).