Page 53 - The Dinosaur Book and Other Wonders of the Prehistoric World (DK-Smithsonian)

Tiktaalik

The strong bony
fins were to evolve
Phlegethontia into legs.

Seymouria fossil Early amphibians

Seymouria’s skull
was unusually thick
and strong.

Powerful tail
propelled this fish
through water.

Eusthenopteron The body was

protected by
big scales.

Amphibamus

Long front and
hind limbs were
the same size.

such as Amphibamus had developed proper amphibians
feet, but they still had to keep their skin moist similar to Eryops
to survive. They also had to return to the and Seymouria evolved
water to lay their eggs, because the eggs of into a group of animals that were
all amphibians are like those of fish, and dry better adapted to live on dry land—
up if they are not laid in wet places. Eventually, the first reptiles. 51

US_050-051_Early_ambhibians.indd 51 26/04/18 3:30 PM