Evolution

All Subspecies: There are no subspecies of Frilled Shark, but there is a sibling species known as the Southern African Frilled Shark

How long has the species been in existence? The Frilled Shark has existed for about 80 million years 

Closely related species: The Southern African Frilled Shark is the only closely related species to the Frilled Shark

Ancestors: The ichthyologist Theodore Gill and paleontologist Edward Drinker Cope, suggested that the Frilled shark is related to the  Hybodontiformes genus. Cope also categorized the Frilled Shark with the Xenacanthus genus. Samuel Garman a zoologist from the 1800s who also published the first taxonomy of the Frilled Shark concluded that the Frilled Shark is related to the Cladoselache genus.