I stage

II stage

III stage

The rage of existing (I) or preferred (II, III) temperature

0˚C - 28˚C

28˚C - 32˚C

34˚C - 36˚C

Representatives among living groups

Tunicata, Acrania,

Agnatha, Pisces,

Amphibia

Reptilia

Dinosaurs

Types of environment

They are tied to

aquatic territories

They colonized marine, fresh-water and terrestrial territories

They were the first who expand to the air