English: American round stingrays; Round rays.
Region: tropical and warm temperate marine waters of the Americas.
Clades:
Myliobatiformes.
ZoologyThe two genera in this family were formerly placed within the family
Urolophidae, whose species are now restricted to the Indo-Pacific. They have a round pectoral fin disk, a slender tail with a caudal fin, no dorsal fins, and a venomous tail spine.