What did the dolphin evolve from

The current process of evolution could be slowly changing the limbs of the dolphin.Even though all modern cetaceans are obligate aquatic mammals, early cetaceans were amphibious, and their ancestors were terrestrial artiodactyls, similar to small deer.Which likely signals a behavioral shift from chewing food to swallowing food whole as modern dolphins do today.Movie clips on the evolution of dolphins and whales.What did the dolphin evolve from?

One such change involves a transition from distinct molars to a homogenous tooth row;The early dolphins were smaller and believed to have consumed small fish as well as various organisms in the water.It was a terrestrial animal that went into the water to feed.About 95 million years ago mesonix, the ancestor of today's dolphin, appeared on earth.The transition from land to water is documented by a series of intermediate fossils, many of.

In other words they went back to live in the sea.Mesonix had front and hind limbs containing bones to support its weight.The rationale is that their best food source was in the water (when they were land animals) and thus they spent so much time in the water that they gradually adapted to it.This is based on research that shows them to be part of the artiodactyl order.It was covred with hair.