FIGURE 3 in A new species of Ituglanis Costa & Bockmann, 1993 (Siluriformes: Trichomycteridae) from Rio Ribeira de Iguape and upper Rio Tietê basins, southeastern Brazil

FIGURE 3. Left lateral view of head illustrating differences in the opercular and interopercular patches of odontodes. A) Ituglanis amphipotamus, paratype, MZUSP 65753, 66.9 mm SL. The posterior margin of the interopercular patch reaches the base of the opercular patch of odontodes, and the distance between the posterior margin of the interopercular patch of odontodes and the pectoral-fin base is similar to the size of the opercular patch of odontodes. B) I. proops, MZUSP 79576, 58.9 mm SL. The posterior margin of the interopercular patch reaches half length of the opercular patch of odontodes, and the distance between the posterior margin of the interopercular patch of odontodes and the pectoral-fin base, is about one third the size of the opercular patch of odontodes. IPO, interopercular patch of odontodes; OPO, opercular patch of odontodes. Scale bars = 5mm.