About Styracura schmardae (Werner, 1904)
This is a large ray species, with a maximum reported pectoral fin disk width of 2 meters (6.6 ft). Its pectoral fin disk is oval, with a long, broadly angled snout. The front margin of the disk is almost straight. The mouth is curved, with indentations at the symphysis and five papillae on the mouth floor. Its teeth have elliptical bases, flattened cusps, and a scallop-edged central depression. The upper jaw holds 28 to 36 rows of teeth. Its tail is relatively short and slender, with no fin folds, and has faint ventral and lateral ridges near the base. A single saw-toothed spine is positioned on the rear half of the tail. The upper surfaces of the body and tail are covered in small tubercles. Large tubercles, each with four radiating ridges, are found on the shoulder region. This species is dark brown to olive on its upper side, yellowish white on its underside, and darkens to blackish toward the tip of the tail.
