Glyphis siamensis
The Irrawaddy Flusshai ( Glyphis siamensis ) is a species of river shark ( genus Glyphis ) within the requiem sharks ( Carcharhinidae ). This shark is known only from a museum specimen, which was captured in the 19th century in the mouth of the Irrawaddy Delta on the coast of Burma. The shark is classified as threatened with extinction.
Features
The only known copy of the Irrawaddy Flusshais is 60 cm long. The South African shark expert, Leonard Compagno assumes a maximum length of one to three meters. The shark has a stocky body, the upper side is brown-gray, underside white and without any drawings. The short rostrum is broadly rounded, the eyes are small. The teeth in the upper jaw are broad, triangular and serrated, the first mandibular teeth have only slightly serrated edges. The beginning of the first dorsal fin is above the end of the pectoral fin base, the second is half as high as the first. A Interdorsalkamm missing. The anal fin has a strong indentation at its rear edge. From the closely related Ganges ( Glyphis gangeticus ) the Irrawaddy Flusshai distinguished by a higher number of vertebrae and a smaller number of teeth.
Endangering
The Irrawaddy Flusshai is in the Red List of IUCN threatened with extinction as ( " Critically Endangered " ) classified.