FIGURE 4 in Systematic revision of the Potamotrygon scobina Garman, 1913 species-complex (Chondrichthyes: Myliobatiformes: Potamotrygonidae), with the description of three new freshwater stingray species from Brazil and comments on their distribution and biogeography

FIGURE 4. Teeth and dermal denticles of the holotype of Potamotrygon scobina (MCZ-602s, juvenile male, 238 mm DW). A. Tooth band of lower jaw. B. Tooth band of upper jaw. C. Lower jaw teeth in detail. D. Upper jaw teeth in detail. E. Denticles of cranial region. F. Dorsal tail thorns at base of tail. G. Denticles of cranial region in detail. H. Dorsal thorns at base of tail in lateral view.