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The broadnose sevengill shark (Notorynchus cepedianus) is the only extant member of the genus Notorynchus, in the family Hexanchidae.It is recognizable because of its seven gill slits, while most shark species have five gill slits, with the exception of the members of the order Hexanchiformes and the sixgill sawshark.
The other shark species with seven gill slits is the broadnose sevengill shark. Though small, this shark is an active, voracious predator of invertebrates and fish. When caught, this species is notably defensive and will attempt to bite. It is of minor commercial importance. [4]
Broadnose sevengill shark (Notorynchus cepedianus) Scientific classification; Domain: ... There is one extant species. Extant species. Broadnose sevengill shark ...
Meghan Holst studies the broadnose sevengill shark, so she was naturally concerned when record-setting rain this year altered the shark's nursery grounds in San Francisco Bay. But the species ...
Heptranchias perlo (Bonnaterre, 1788) (sharpnose sevengill shark) †Heptranchias ezoensis Applegate & Uyeno, 1968 †Heptranchias howelli Reed, 1946 †Heptranchias karagalensis Kozlov in Zhelezko & Kozlov, 1999 †Heptranchias tenuidens Leriche, 1938
Frilled sharks contain only two extant species of deepsea creatures which are typically weakened in areas closer to the surface. The most widely known species still surviving is the frilled shark, known as a living fossil, along with the Southern African frilled shark, found along coastal areas of South Africa. Several extinct species are known.
Shark research is hard to get funding for, in part, because sharks aren’t a commercial species. Yet the irony is that they affect commercial species, namely fish populations.
Heptranchias howelli, the sevengill shark, is a nektonic carnivore in the genus Heptranchias. It is an extinct species that ranged from 37.2 to 20.43 Ma. [3]