Anatomía del corazón y las arterias branquiales aferentes de las rayas (Chondrichthyes: Batoidea)

the heart and the afferent branchial system of the ray, dasyatis sabina was selected as a morphologic pattern of the batoidea. a comparison of the heart and the ramification of the ventral aorta into the branchial afferent arteries was made with the corresponding in representative species of other families of batoidea, such as: narcine brasiliensis (narcinidae), rhinobatos lentiginosus (rhinobatidae), raja texana (rajidae), urobatis jamaicensis (urolophidae), gymnura micrura (gymnuridae), and myliobatis sp. (myliobatidae). the comparative analysis allows recognizing as the most notably character, the absence of the posterior innominates arteries in the myliobatiformes, with the exception of gymnuridae. a high similitude between rhinobatidae and rajidae, and urolophidae and dasyatidae was recognized.