FIGURE 5. a in A new tiny-spotted species of Hypostomus (Siluriformes: Loricariidae) from the upper Rio Tocantins basin, Goiás State, Brazil

FIGURE 5. a) Hypostomus lamberti, NUP 23640, 175.5 mm SL, holotype, showing the presence of extremely small dark spots on head; b) Hypostomus affinis, live specimen (not preserved) from Rio Mucuri at downstream of UHE Santa Clara, showing moderately-sized dark spots on head; c) Hypostomus commersoni, live specimens (not preserved) from rio Lageado Fragoso (Uruguay basin) at Santa Catarina State, showing strongly developed keels on flanks and long dorsal fin.