Tortoise

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tortoise : any of a family (Testudinidae) of terrestrial turtles — Webster

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Tortoises are a family, Testudinidae. Testudinidae is a Family under the order Testudines and suborder Cryptodira. There are fourteen extant families of the order Testudines, an order of reptile commonly known as turtles, tortoises, and terrapins. The suborder Cryptodira is a suborder of Testudines that includes most living tortoises and turtles. Cryptodira differ from Pluerodia in that they lower their necks and pull the heads straight back into the shells, instead of folding their necks sideways along the body under the shells’ marginals. The testudines are some of the most ancient reptiles alive. Tortoises are shielded from predators by a shell. The top part of the shell is the carapace, the underside is the plastron, and the two are connected by the bridge.

The carapace is fused to both the vertebrae and ribcage, and tortoises are unique among vertebrates in that the pectoral and pelvic girdles are inside the ribcage rather than outside. Tortoises can vary in dimension from a few centimeters to two meters. They are usually diurnal animals with tendencies to be crepuscular depending on the ambient temperatures. They are generally reclusive animals. Tortoises are the longest living land animal in the world, although the longest living species of tortoise is a matter of debate. Galápagos tortoises are noted to live over 150 years, but an Aldabra giant tortoise named Adwaita may have been the longest living at an estimated 255 years. In general, most tortoise species can live 80–150 years. — Wikipedia

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Phys.org - latest science and technology news stories Phys.org internet news portal provides the latest news on science including: Physics, Nanotechnology, Life Sciences, Space Science, Earth Science, Environment, Health and Medicine.

  • Coat the ravens evermore? To protect tortoises,...
    on June 17, 2019 at 4:48 pm

    The sun was rising over the Mojave Desert as crews prepared to demonstrate a devastating new weapon in the war among man, bird and reptile. […]

  • Those who live longer have fewer children
    on June 13, 2019 at 11:57 am

    A long life and lots of children—that was quite a common aspiration until not so long ago. But the world of animals reveals that high fertility and longevity are often mutually exclusive: Particularly animals with shorter lifespans are often very fertile while animals that live longer frequently produce fewer offspring. It seems that organisms with limited resources can be either long-lived or very fertile—but they can't be both at the same time. Scientists at the Max Planck […]

  • Chimpanzees spotted cracking open tortoises for...
    on May 23, 2019 at 1:52 pm

    Scientists have observed wild chimpanzees tucking into an unusual snack: tortoises, whose hard shells they crack against tree trunks before scooping out the meat. […]

  • From mother to daughter, Tunisia potters pass on...
    on May 16, 2019 at 5:58 am

    With bucket and spade in hand, Sabiha Ayari from Sejnane in northern Tunisia is among the women keeping alive an ancient tradition of creating pottery with all-natural materials. […]

  • Crowdfunding brings life-saving water to...
    on May 10, 2019 at 8:05 am

    A herd of endangered deer wait under the shade of one of the sparse trees in this parched central Myanmar landscape, watching as rangers dispatch drinking water—a life-saving resource funded by wellwishers across the country. […]