FIGURE 20 in Potamotrygon tigrina, a new species of freshwater stingray from the upper Amazon basin, closely related to Potamotrygon schroederi Fernandez-Yépez, 1958 (Chondrichthyes: Potamotrygonidae)

FIGURE 20. Ventral lateral line canals of Potamotrygon schroederi, highlighting specific features (on right) that may be derived for P. schroederi and P. tigrina (see text for details). Highlighted canals are as follows: 1: rostral loop of the infraorbital canal; 2: orbitonasal component of the supraorbital canal 3: suborbital loop of the infraorbital canal; 4: compressed posterior jugular loop formed between jugular and infraorbital canals. Illustration based on MZUSP 108455.