RESUMO
Two undescribed species of the genus Squatina, caught by bottom-trawl during the OGMEX VIII, IX and PROBEMEX II oceanographic cruises were compared with S. dumeril Lesueur, 1818, the only well known species from the northern Gulf of Mexico. The collections were made off Tamaulipas, Veracruz and Tabasco. The descriptions of the new species refer to morphology, coloration pattern and dorsal fin shape and size. An English description of each species is included. Some specimens erroneously assigned to S. dumeril are deposited in Mexican collections. With these two new species, besides S. californica Ayres, 1859 and S. dumeril, the number of documented species of this genus in Mexico ascends to four, and a total of five are known from the western Atlantic. A key is provided for their identification.
El estudio de varios individuos pertenecientes al género Squatina, capturados con red de arrastre durante las campañas oceanográficas OGMEX VIII, IX y PROBEMEX II, a bordo del Buque Oceanográfico de la UNAM Justo Sierra frente a las costas de Tamaulipas, Veracruz y Tabasco, permitió detectar la existencia de dos especies no descritas, que fueron comparadas con S. Dumeril Lesueur, 1818, única especie en el norte del Golfo de México. Las descripciones de las nuevas especies hacen referencia a su morfología, patrón de coloración, forma y tamaño de las aletas dorsales principalmente. Algunos ejemplares, erróneamente asignados como S. dumeril, se encuentran depositados en colecciones de México. Con estas dos nuevas especies, además de S. dumeril y S. Californica Ayres, 1859, son cuatro las que se detectan dentro del territorio mexicano y cinco las que existen en el Atlántico Occidental. Se incluye una clave para su identificación.
Assuntos
Animais , Tubarões/classificação , México , Tubarões/anatomia & histologia , Especificidade da EspécieRESUMO
Two undescribed species of the genus Squatina, caught by bottom-trawl during the OGMEX VIII, IX and PROBEMEX II oceanographic cruises were compared with S. dumeril Lesueur, 1818, the only well known species from the northern Gulf of Mexico. The collections were made off Tamaulipas, Veracruz and Tabasco. The descriptions of the new species refer to morphology, coloration pattern and dorsal fin shape and size. An English description of each species is included. Some specimens erroneously assigned to S. dumeril are deposited in Mexican collections. With these two new species, besides S. californica Ayres, 1859 and S. dumeril, the number of documented species of this genus in Mexico ascends to four, and a total of five are known from the western Atlantic. A key is provided for their identification.
