photos by Mark Sabaj
identifications by Adriana Aquino, 2005

Hypoptopoma steindachneri - ANSP 178338 - 72.7 mm SL
Rio Nanay, near Iquitos, Peru

Hypoptopoma gulare - ANSP 178340 - 98 mm SL
Rio Nanay, near Iquitos, Peru

Hypoptopoma psilogaster - ANSP 178339 65.7 mm SL
Rio Nanay, near Iquitos, Peru

Hypoptopoma sp. - ANSP 180657- 42.8 mm SL
trib to Rio Itaya (white water), near Iquitos, Peru

Hypoptopoma guianensis - ANSP 180667 - 53.7 mm SL
(well-developed teeth on inner margin of pectoral spine)
Simoni River (Rupununi - Essequibo Dr.), 2 km W of Karanambo Ranch, Guyana

Hypoptopoma sp. - ANSP 180670 - 40.8 mm SL
(teeth minute or completely lacking on inner margin of pectoral spine)
Yuora River (trib to Ireng, Takutu - Branco Dr.), 6.7 km NE of Karasabai, Guyana
(also in Essequibo and its trib the Rupununi)

Hypoptopoma inexspectatum (tissue tag 5047)
Rio Paraná near confluence with Rio Guayquiraro, 25 km S of Esquina, Argentina

Hypoptopoma inexspectatum (tissue tag 5089)
Rio Paraná near confluence with Rio Guayquiraro, 25 km S of Esquina, Argentina