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.

  • Human action key to antibiotic resistance in...
    on July 19, 2021 at 5:19 pm

    The Giant Galapagos tortoises which live in contact with human farming and tourism activities, or in urbanized zones, have more bacterial resistance to antibiotics than those that live in more isolated ecosystems.

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    on May 12, 2021 at 2:56 pm

    The gopher tortoise (Gopherus polyphemus) is declining because of habitat loss and fragmentation, human interaction including collisions with vehicles, predation by domestic animals, and disease. These long-lived reptiles are found throughout Florida and are affected by various diseases including upper respiratory tract disease. A number of pathogens such as Mycoplasma spp., Herpesvirus, and Ranavirus are known to cause upper respiratory tract disease in gopher tortoises. Chronic disease […]

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