The Biggest Animals Kingdom and in The World | Turtle | The largest living Chelonian is the leatherback turtle (Dermochelys coriacea), a shell length of 200 centimeters (6.6 ft) and weighs over 900 kg (2,000 lb) to achieve. Freshwater turtles are generally smaller, but the largest species, the Asian softshell turtle Pelochelys cantorii, some people were up to 200 centimeters (6.6 ft) reports. This dwarfs even the better-known alligator snapping turtle, the largest in North America Chelonian, reaching a shell length of up to 80 centimeters (2.6 ft) and weighs less than 113.4 kg (250 pounds).
The largest ever was Chelonian ischyros Archelon, a Cretaceous sea turtle known to have been up to 4.6 meters (15 feet) long. The smallest turtle is the spotted turtle padloper of South Africa. Two other species of small turtles are the American mud turtles and musk turtles that live in an area that runs from Canada to South America. Most turtles that spend most of their lives on the land have their eyes looking up objects for themselves. Some turtles, like snapping turtles and softshell turtles have eyes closer to the top of the head. Sea turtles have glands near their eyes, salty tears that drink their body of excess salt from the water they get rid of products.
Turtles are thought to have exceptional night vision due to the abnormally large number of rods in their retinas. Turtles have red color vision with a wealth of cone subtypes with sensitivities of the near ultraviolet (UVA) on. Some land turtles have very poor pursuit movement abilities, usually for the predators that hunt quick moving prey are reserved, but carnivorous turtles can easily break their heads. Turtles have a strong beak. Turtles use their jaws to cut and chew. Carnivorous turtles usually have sharp edges to cut through their prey. Herbivorous turtles have serrated edges burrs, they help you through tough plants. Turtles use their tongues to swallow food on, but they can not, unlike most reptiles, start stabbing their tongues to food.
The rest of the skin with the skin is of a much smaller scale, comparable with the skin of other reptiles. Turtle skin is not in one go, as do snakes, but continuously cut into small pieces. Tortoises also shed skin, but a lot of dead skin in thick knobs and plates that accumulate to provide protection to parts of the body outside the shell. Although many turtles spend large amounts of their lives underwater, all turtles breathe air and must meet regularly to fill their lungs. You Aquatic respiration in Australian freshwater turtles is currently being investigated. Turtles lay their eggs like other reptiles, which are slightly soft and leathery. Turtle eggs prepared to eat consist mainly of yolk. In some species, temperature determines whether an egg causes a man or a woman, a woman developed a lower temperature, higher temperature causes man.
If the turtles to hatch, they wriggle their way to the surface and then towards the water. Sea turtles lay their eggs on dry sandy beaches. Immature sea turtles are not cared for by adults. This has inspired genetic researchers, an examination of the turtle for longevity genes The first proto-turtles have existed probably in the Late Triassic of the Mesozoic Era, about 220 million years ago, and their shells, which remained remarkably stable body plan is thought of bony extensions of their backbones and developed wide have ribs that expanded and grew together to form a complete shell that protection to form at each stage of its development, even if the bony part of the container was not complete.
Odontochelys a complete bony plastron and an incomplete shell, similar to an early stage of embryonic turtle. More recent morphological phylogenetic studies made in this sense turtles firmly in diapsids, slightly closer to Squamata than to Archosauria. All molecular studies have strongly confirmed the placement of turtles into diapsids, turtles everywhere in Archosauria, or, more generally, as a group, consisting archosaurs sister, but an analysis of Lyson et al. (2012) found turtles as the sister group of the lepidosaurs place. Reanalysis prior phylogenies suggests the classified turtles as anapsids both because they assumed that (study, most of them, what kind anapsid are turtles) this classification because they do not do sample of fossil and extant taxa broadly enough for constructing the cladogram .
Even the traditional placement of turtles outside Diapsida can not be excluded at this point. turtle traits, and thus probably had many millions of years of evolution and the former species of turtle in his pedigree. Turtles are two existing submissions, and the Cryptodira Pleurodira divided. The Cryptodira is the larger of the two groups, and includes all sea turtles, the terrestrial turtles, and many of the freshwater turtles. The Pleurodira are also known as the side-necked turtles, a reference to the way they pull their heads into their shells known. This smaller group consists primarily of various freshwater turtles.
Seven species of sea turtles worldwide. The meat of turtles, or calipash Calipee was, and is considered a delicacy in some cultures. Turtle soup is a valuable shell in Anglo-American dishes and is still in some parts of Asia. Gopher tortoise stew with some groups in Florida was very popular.Turtles remain a part of the traditional diet on the island of Grand Cayman, so much so that when the wild population has been exhausted, a turtle farm is designed to collect turtles for their meat.