Tortugas

Metabolism is very slow and turtles, aquatic species, can remain without breathing for long. In temperate climates hibernate all species regularly. 
Reproduction is oviparous and the incubation wasperformed in nests dug themselves on earth, where the necessary heat is provided by solar radiation. A special case is the primitive emys Manouria Asian tortoise, which builds a nest about 50 cm basedon soil and leaves. 
Proverbial extreme longevity is the turtle. One of the turtles that are known to lived more than a Galapagos tortoise named Harriet Charles Darwin, lived 175 years. 
There areturtles, terrestrial habitat, marine and fresh water. There are also many species with semi-aquatic habitats, spend some time on land and part in fresh water.The terrestrial habitat have free fingers,while the aquatic habitats have fins transformed into limbs or fingers webbed. 
Proganochelys quenstedtii, the first turtle. 
Chelodina longicollis, a Pleurodira, one of the existing suborders ofturtles. 
Trachemys scripta elegans, is commonly seen as pets. 
In the early Triassic period, 260 million years ago, appeared Captorhinus, a small snake about 60 cm long. This little animal was thefirst reptile to have a shell that covered his chest, organs, and also cover his ribs. This made it possible for some animals such as turtles, develop a shell of bone. The oldest Testudines know isOdontochelys, who lived in South Asia in the Triassic, 220 million years ago, which means that the turtle is one of the oldest reptile groups and, of course, much older than the lizards and snakes. Itwas water, and had a plastron well defined, but the back was primitive. The next turtle was Proganochelys (formerly Triasssochelys), who lived in the Upper Triassic of Eurasia years.2 210 million was aprimitive turtle with a shell similar to existing species, but still had teeth in the palate, the head, tail and legs could not retract into the shell, but were protected by thorns. 
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