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Period: 450 BCE to 400 BCE
Silurian Era
443 million years to 416 million. The Acanthodian is a species of bony fish which develops here and starts the shark bloodline. -
Period: 419 BCE to 358 BCE
Devonian Era
419 million years to 358 million years ago. The Leonodus shark and Antarctilamna evolved here, and were considered the first fully developed sharks. Later into the era, the Cladoselache shark developed, with different body features compared to its ancestors which resemble more recent species. -
Period: 359 BCE to 299 BCE
Carboniferous Era
359 million years to 299 million years ago. Sharks in this period of history were at their most diverse, with interesting body features such as the Stethacanus shark with an anvil-like fin on top. -
Period: 199 BCE to 145 BCE
Jurassic Era
199 million to 145 million years ago. Sharks in this time developed traits such as flexible jaws, tail fins and other abilities. -
Period: 145 BCE to 65 BCE
Cretaceous Period
145 million years to 65 million years ago. Some shark species from this period still exist to this day. The Lamnidae sharks, who are believed to be the source of the modern shark anatomy, developed here. -
Period: 60 BCE to 1 BCE
Early Cenozoic Era
60 million years ago, the Megalodon was a shark spanning 65 feet in length and weighing around 30 tons. It is considered to be the most popular prehistoric shark. -
Period: 1 CE to
Cenozoic Era
The current shark population is a mix of recent evolutions from the current era and ancient sharks from the Cretaceous period. Source: https://www.sharksider.com/timeline-shark-evolution/