Elephant sharks, aka Australian ghost sharks, aren’t really sharks at all. They actually belong to a prehistoric group of fish called ratfish, which diverged from sharks about 400 million years ago.

Cartilaginous fishes (sharks, rays, skates, and chimaeras) are the phylogenetically oldest group of living jawed vertebrates. They are also an important outgroup for understanding the evolution of ...

The emergence of jawed vertebrates (gnathostomes) from jawless vertebrates was accompanied by major morphological and physiological innovations, such as hinged jaws, paired fins and ...

The team also documented the first-ever data on a chimaera species (Callorhinchus milii), which showed no TLR response, adding an important piece to the evolutionary puzzle of this behavior in early ...

It’s a living fossil to beat all others. The elephant shark, Callorhinchus milii (pictured), has the slowest-evolving genome of any vertebrate. C. milii is not actually a true shark but belongs to a ...

The genome of the elephant shark "is evolving significantly slower than other vertebrates, including the coelacanth", they reported in the journal Nature. Known by its Latin name as Callorhinchus ...

The genome of the elephant shark “is evolving significantly slower than other vertebrates, including the coelacanth”, they reported in the journal Nature on Wednesday. Known by its Latin name as ...