How to evolve fully terrestrial sharks, 100 million years in the future?

This is part of the same world I am making that this question I once asked is set in: How to evolve a reptile into a wyvern, 100 million years in the future?

I might call these questions related to this world the "100 million years into the future" questions.

In that same futuristic Earth I imagine sharks that walk (or at least crawl) on land with some fully disconnected from sea life, that can breathe air directly and thus either dig underground or climb up in trees. Most of their species have evolved from today's Epaulette shark which is known to walk on the sea floor in reefs and occasionally comes out of water to crawl back into water.

These "land sharks" however are not your good old Shark Week Sharknado style nightmare that terrorizes everything, instead I imagine these sharks as rather small and "peaceful" ones. These sharks would mostly be herbivore and insectivore and they are preyed upon by terrestrial predators of that time like the wyverns from my other question.

What would drive the Epaulette shark to evolve into descendants that can breathe in the air and evolve into creatures that would never see the ocean again and would these sharks be able to consume vegetation or insects as their main source of food on land?

posted over 6 years ago

Victorbrine Cassini‭

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