Notorynchus
Notorynchus is a genus of cow shark in the family Hexanchidae. This genus is characterized by having six or seven gill slits on each side of the head, unlike most other sharks which have five. Currently, there are two recognized living species within the genus Notorynchus, though some historical species are also assigned to it.
The most well-known species is the sevengill cow shark, Notorynchus cepedianus. This species is found in temperate
Fossil evidence suggests that Notorynchus has a long evolutionary history, with remains dating back to the