FIGURE 13 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 13. Skeletal anatomy (from radiographs) of Potamotrygon scobina (MZUSP 104247, adult male, 503 mm DW). A. Ventral view of anterior disc. B. Ventral skull and jaws. C. Pectoral girdle. D. Angular cartilages, right side. E. Pelvic girdle. F. Pelvic fins and clasper skeleton. Abbreviations: AAC, anterior angular cartilage; AX, axial cartilage; BCO, coracoid bar; B1, first basal segment; B2, second basal segment; BP, basipterigium; HYO, hyomandibula; LAC, lateral angular cartilage; MC, Meckel's cartilage; MES, mesopterygium; MET, metapterygium; MSC, mesocondyle; MTC, metacondyle; PAC, posterior angular cartilage; PIB, puboischiadic bar; PQ, palatoquadrate; PRC, procondyle; PRO, propterygium.