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The turtle shell is a shield for the ventral and dorsal parts of turtles (the order Testudines), completely enclosing all the vital organs of the turtle and in some cases even the head. [1] It is constructed of modified bony elements such as the ribs, parts of the pelvis and other bones found in most reptiles.
Odontochelys semitestacea (meaning "toothed turtle with a half-shell") is a Late Triassic relative of turtles [1].Before Pappochelys was discovered and Eunotosaurus was redescribed, [2] Odontochelys was considered the oldest undisputed member of Pantestudines (i.e. a stem-turtle).
Pantestudines or Pan-Testudines is the proposed group of all reptiles more closely related to turtles than to any other living animal. It includes both modern turtles (crown group turtles, also known as Testudines) and all of their extinct relatives (also known as stem-turtles). [2] Pantestudines with a complete shell are placed in the clade ...
The reduction of use of turtle shells beyond that date was held to be due to measures taken by the conservation movement to preserve turtles. [5] Toluk are exchanged between families, rather than among members of a single family; they are offered to female in-laws as a form of ritual payment for goods or services. Once received, they are ...
The shell is not an exoskeleton, but a modified ribcage and part of the vertebral column. Because of the shell, the pectoral and pelvic girdles are located within the ribcage. The limb bones are also modified to accommodate to the shell. [1] The earliest known turtles are from fossils in the Upper Triassic. These fossils are nearly ...
The box turtle has a distinctive hinged lower shell that allows it to completely enclose itself, like a box. Its upper jaw is hooked. The turtle is primarily terrestrial and eats a wide variety of plants and animals. The females lay their eggs in the summer. Turtles in the northern part of their range hibernate over the winter.
Squamata is the largest order of reptiles, comprising lizards, snakes and amphisbaenians (worm lizards), which are collectively known as squamates or scaled reptiles. With over 10,000 species, [15]
A tortoiseshell ornament from Micronesia Cabinet with tortoiseshell veneers French singing bird box with a case made out of tortoiseshell.. Tortoiseshell or tortoise shell is a material produced from the shells of the larger species of tortoise and turtle, mainly the hawksbill sea turtle, which is a critically endangered species according to the IUCN Red List largely because of its ...
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