FIGURE 20 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 20. Scanning Electron Microscope (SEM) images of the dermal denticles of Potamotrygon adamastor, sp. nov. (MZUSP 104664). A. Rostral region. B. Rostral region in detail. C. Dorsal head region. D. Dorsal head region in detail. E. Dorsal caudal region. F. Dorsal caudal region in detail. Abbreviations: Bp, basal plate; Br, basal ridge; Cr, coronal ridge; Co, corona; Cd, coronal dichotomy; Cp, coronal plate.