Related topics: eggs ยท sea turtles

New species of turtle discovered

Together with an international team, Senckenberg scientist Uwe Fritz described a new species of mata mata turtle based on genetic analyses. Until now, it had been assumed that the genus Chelus only contained a single species. ...

Sparkling waters hide some lasting harm from 2010 oil spill

Ten years after a well blew wild under a BP platform in the Gulf of Mexico, killing 11 men and touching off the nation's worst offshore oil spill, gulf waters sparkle in the sunlight, its fish are safe to eat, and thick, ...

Shell puzzle: An additional piece added to the evolution of turtles

The origin of turtles is among the most debated topics in evolutionary biology. In a recently published study in the journal Nature Scientific Reports, Senckenberg scientist Ingmar Werneburg, in cooperation with an international ...

page 1 from 66

Turtle

Cryptodira Pleurodira and see text

Turtles are reptiles of the order Testudines (the crown group of the superorder Chelonia), characterised by a special bony or cartilaginous shell developed from their ribs that acts as a shield. "Turtle" may either refer to the Testudines as a whole, or to particular Testudines which make up a form taxon that is not monophyletic—see also sea turtle, terrapin, tortoise, and the discussion below.

The order Testudines includes both extant (living) and extinct species. The earliest known turtles date from 215 million years ago, making turtles one of the oldest reptile groups and a more ancient group than lizards and snakes. About 300 species are alive today, and some are highly endangered.

Like other reptiles, turtles are ectotherms—varying their internal temperature according to the ambient environment, commonly called cold-blooded. Like other amniotes (reptiles, dinosaurs, birds, and mammals), they breathe air and do not lay eggs underwater, although many species live in or around water. The largest turtles are aquatic.

This text uses material from Wikipedia, licensed under CC BY-SA