Resumen de First record of bicephalism in the blacktip shark Carcharhinus limbatus (Elasmobranchii: Carcharhinidae) in the southern Gulf of Mexico

Armando T. Wakida Kusunoki, Vicente Anislado Tolentino, Rodolfo Castro Barbosa, Luis Fernando Del Moral Flores

• The first case of bicephalia in a male embryo of the blacktip shark Carcharhinus limbatus in the southern Gulf of Mexico is described. The embryo was found and removed from a pregnant female caught off the coast of Tabasco, Mexico. The specimen had two heads, two dorsal fins, two spine columns conjoined in the pelvic region, two esophagus, and a single stomach.