Pastinachus

Sephen Pastinachus

The genus Pastinachus belongs to the family of stingrays ( Dasyatidae ). The species of the genus live in many parts of the Indo-Pacific from the Red Sea to the west and the East China Sea and Melanesia in the east.

Features

Several species live sympatrically in the Malay Archipelago and long time were not considered as separate species, although they differ both in size in proportion to the total length to the width of the fin plate and other features. The fins disc is diamond shaped ( trapezoidal ). The tail has at hand a fold of skin that sephen in the first described type, Pastinachus to the English common name cowtail stingray ( cow's tail stingray ) has led. The width of the fold varies between the different types. The color is gray-brown with a reddish hue.

Species

Pastinachus was long considered monotypic, with Pastinachus sephen the only Art Under the Australian CSIRO project 2005, and two other new species described in 2010 and the genus have been assigned. Some copies of 1883 by Macleay as Taeniura atra type described were molecular genetic investigated and compared with other species, leading to the reassignment as Pastinachus Atrus.

• Pastinachus Atrus ( Macleay, 1883)
• Pastinachus gracilicaudus ( Last & Manjaji - Matsumoto, 2010)
• Pastinachus sephen ( Forsskål, 1775)
• Pastinachus solocirostris (load, Manjaji & Yearsley, 2005)
• Pastinachus stellurostris (load, Fahmi & Naylor, 2010)

Phylogeny

Combining the molecular genetic kinship analysis of DNA NADH2, which served the allocation of Pastinachus stellurostris and analysis of the COI gene was evaluated gracilicaudus accordance with the Pastinachus results in approximately the following cladogram for the genus: