Mackerel sharks (order Lamniformes) are a large group consisting of about 22 species in 10 different families. Some well-known mackerel sharks include: Requiem sharks are large, migratory sharks ...

Today, sharks are classified among the elasmobranchs, which also includes the rays and skates. Number of species: There are well over 350 known species of sharks, and new species are described ...

A new species of shark has been discovered a Mammoth Cave National Park, where fossil records have revealed more than 70 ...

Skeletal reconstruction and tooth arrangement of Netsepoye from the Late Mississippian of Montana. Teeth are arranged as if ...