The genus Urotrygon comprises small‐to medium‐sized endemic round rays on the
American continent and has undergone several synonymization processes. Here, we used …

The taxonomic status of butterfly rays within the genus Gymnura remains a subject of
ongoing debate among researchers. Some authors recognize up to five valid species for the …

Records about morphological abnormalities in rays of the genus Myliobatis are scarce
worldwide. In the present study, three specimens exhibiting different malformations were …

While morphological abnormalities have been widely reported in batomorphs, ontogenetic
deformities of the posterior pectoral fin are rare. In this paper, we present two individuals of …

Maternal nutrient provisioning occurs in most live‐bearing chondrichthyan lineages. It is
particularly conspicuous in the Myliobatiformes, whereby the endometrium secretes a …

The competitive exclusion principle establishes that the coexistence of closely related
species requires a certain degree of resource partitioning. However, populations have …

Pelvic fins are a characteristic structure of the vertebrate Bauplan. Yet, pelvic fin loss has
occurred repeatedly across a wide diversity of other lineages of tetrapods and at least 48 …

While morphological abnormalities have been widely reported in batomorphs, ontogenetic
deformities of the posterior pectoral fin are rare. In this paper, we present a bluespotted …

This study provides morphometric, genetic, taxonomic, and biogeographic information for
Urotrygon rogersi (Jordan & Starks, 1895). A complete taxonomic identification was applied …

The first case of a morphological abnormality in the broadnose skate Bathyraja brachyurops
is reported. The specimen was captured by a vessel fishing in the Southwest Atlantic Ocean …