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Turtle

For other uses, see Turtle (disambiguation).
Families
Testudines, Chelonia

Turtles are reptiles of the order Testudines (all living turtles belong to the crown group Chelonia), most of whose body is shielded by a special bony or cartilagenous shell developed from their ribs. The term turtle is usually used for the aquatic species, though aquatic fresh water turtles are also called terrapins. The term is sometimes used (esp. in North America) to refer to all members of the order, including tortoises, which are predominantly land-based. The order of Testudines includes both extant (living) and extinct species. About 300 species are alive today. Some species of turtles are highly endangered.

Description

All turtles have a protective shell around their bodies. The top part of the shell is called the carapace, the bottom is called the plastron, and the two are connected by a bridge. Some are known to be able to breathe through their rectums as well. Reference the Rheodytes leukops species.

Sea turtles grow to large sizes and live in the oceans in the temperate and tropical regions of Earth. Pond turtles (terrapins) are usually much smaller, while some land terrapins (tortoises) are as large as sea turtles. The sizes of turtles vary from a few centimetres (forest and jungle species) to two metres (the leatherback turtle and the Galapagos tortoise).

Turtles generally live a long time; some individuals are known to have lived longer than 150 years. The oldest tortoise on record is Tui Malila, known to have lived at least 188 years.

Sea turtles lay their eggs on dry sandy beaches. The eggs of the largest species are spherical, while the eggs of the rest are elongated. Their albumen is white and will not coagulate when cooked because of the protein it contains which is different to that of bird eggs. Turtle eggs prepared to eat consist mainly of yolk. In some species, temperature of the egg during development determines whether an egg develops into a male or a female: a higher temperature causes a female, a lower temperature causes a male.

Although they spend large proportions of their lives underwater, turtles are air-breathing reptiles, and must surface at regular intervals to refill their lungs with fresh air. However, aquatic respiration in Australian freshwater turtles is currently being studied. Some species have large cloacal cavities lined with many finger-like projections. These projections, called "papillae", have a rich blood supply, and increase the surface area of the cloaca. The turtles can take up dissolved oxygen from the water through these papillae, in much the same way that fish use gills.

Turtles have a gelatinous substance in their upper and lower shell, called calipash and calipee respectively, the calipash being of a dull greenish and the calipee of a light yellow color.

Evolution

The first turtles are believed to have existed in the era of the dinosaurs, 200 million years ago. Their exact ancestry is disputed. It was believed that they are the only surviving branch of the ancient clade Anapsida, which includes groups such as procolophonoids, millerettids, protorothyrids and pareiasaurs. All Anapsid skulls lack a temporal opening, while all other extant amniotes have temporal openings (although in mammals the hole has become the zygoid arch). Most anapsids became extinct in the late Permian period, except procolophonoids and possibly the precursors of the testudines (turtles).

However, it was recently suggested that the Anapsid-like turtle skull may be due to convergent evolution rather than to anapsid descent. More recent phylogenetic studies with this in mind placed turtles firmly within diapsids, slightly closer to Squamata than to Archosauria. All molecular studies have strongly upheld this new phylogeny, though some place turtles closer to Archosauria. Re-analysis of prior phylogenies suggests that they classified turtles as anapsids both because they assumed this classification (most of them studying what sort of anapsid turtles are) and because they did not sample fossil and extant taxa were broadly enough for constructing the cladogram. While the issue is far from resolved, most scientists now lean towards a Diapsid origin for turtles.

Order Testudines - Turtles

Gulf Coast Box Turtle, Terrapene carolina major (Emydidae) A slider of genus Trachemys A Leatherback Sea Turtle. Photo credit: NOAA

Suborder Paracryptodira (extinct)

Suborder Cryptodira

Suborder Pleurodira


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Suborder Pleurodira. They have two adopted children, Josephine, born in 1993, and Cecilia, born in 1990, who both currently attend The Chapin School. Suborder Cryptodira. Wang currently lives in New York City with her husband, Arthur Becker, the CEO of a company called Navisite. Suborder Paracryptodira (extinct)
. In June 2005, she won the CFDA (Council of the Fashion Designers of America) women's wear designer of the year. While the issue is far from resolved, most scientists now lean towards a Diapsid origin for turtles. She also penned the book Vera Wang on Weddings which was released by Harper Collins in October, 2001.

Re-analysis of prior phylogenies suggests that they classified turtles as anapsids both because they assumed this classification (most of them studying what sort of anapsid turtles are) and because they did not sample fossil and extant taxa were broadly enough for constructing the cladogram. She has expanded her brand name though her own fragrance, jewelry, shoe and houseware collections. All molecular studies have strongly upheld this new phylogeny, though some place turtles closer to Archosauria. She has designed costumes for figure skaters, including Nancy Kerrigan and Michelle Kwan, and has made wedding gowns for Mariah Carey, Jennifer Lopez, Jessica Simpson,Victoria Beckham and Sharon Stone, among others. More recent phylogenetic studies with this in mind placed turtles firmly within diapsids, slightly closer to Squamata than to Archosauria. In 1990, she opened her own design salon in Carlyle Hotel in New York which featured her trademark bridal gowns. However, it was recently suggested that the Anapsid-like turtle skull may be due to convergent evolution rather than to anapsid descent. She worked for Ralph Lauren as a design director for two years.

Most anapsids became extinct in the late Permian period, except procolophonoids and possibly the precursors of the testudines (turtles). Wang was a senior fashion editor for Vogue magazine. All Anapsid skulls lack a temporal opening, while all other extant amniotes have temporal openings (although in mammals the hole has become the zygoid arch). When she failed to make the US Olympic team, she turned to her other passion, fashion. It was believed that they are the only surviving branch of the ancient clade Anapsida, which includes groups such as procolophonoids, millerettids, protorothyrids and pareiasaurs. Figure Skating Championships. Their exact ancestry is disputed. As a girl, Wang trained as a figure skater, and competed at the 1968 U.S.

The first turtles are believed to have existed in the era of the dinosaurs, 200 million years ago. Her maternal grandfather was a warlord in China. Turtles have a gelatinous substance in their upper and lower shell, called calipash and calipee respectively, the calipash being of a dull greenish and the calipee of a light yellow color. Her paternal grandfather was a military general in China. The turtles can take up dissolved oxygen from the water through these papillae, in much the same way that fish use gills. Her father started and owned a chemical company. These projections, called "papillae", have a rich blood supply, and increase the surface area of the cloaca. Her mother often took her to fashion shows in Paris.

Some species have large cloacal cavities lined with many finger-like projections. She graduated from Sarah Lawrence College with a degree in art history. However, aquatic respiration in Australian freshwater turtles is currently being studied. She is a Chinese American raised in an affluent family and attended the The Chapin School, which both her daughters currently attend, and the Sorbonne in Paris. Although they spend large proportions of their lives underwater, turtles are air-breathing reptiles, and must surface at regular intervals to refill their lungs with fresh air. She is known for her wedding gown collection among other specialties. In some species, temperature of the egg during development determines whether an egg develops into a male or a female: a higher temperature causes a female, a lower temperature causes a male. Vera Wang (Chinese: 王薇薇; Hanyu Pinyin: Wáng Wēiwei; born June 27, 1949) is a fashion designer based in New York, NY, USA.

Turtle eggs prepared to eat consist mainly of yolk. Their albumen is white and will not coagulate when cooked because of the protein it contains which is different to that of bird eggs. The eggs of the largest species are spherical, while the eggs of the rest are elongated. Sea turtles lay their eggs on dry sandy beaches.

The oldest tortoise on record is Tui Malila, known to have lived at least 188 years. Turtles generally live a long time; some individuals are known to have lived longer than 150 years. The sizes of turtles vary from a few centimetres (forest and jungle species) to two metres (the leatherback turtle and the Galapagos tortoise). Pond turtles (terrapins) are usually much smaller, while some land terrapins (tortoises) are as large as sea turtles.

Sea turtles grow to large sizes and live in the oceans in the temperate and tropical regions of Earth. Reference the Rheodytes leukops species. Some are known to be able to breathe through their rectums as well. The top part of the shell is called the carapace, the bottom is called the plastron, and the two are connected by a bridge.

All turtles have a protective shell around their bodies. . Some species of turtles are highly endangered. About 300 species are alive today.

The order of Testudines includes both extant (living) and extinct species. in North America) to refer to all members of the order, including tortoises, which are predominantly land-based. The term is sometimes used (esp. The term turtle is usually used for the aquatic species, though aquatic fresh water turtles are also called terrapins.

Turtles are reptiles of the order Testudines (all living turtles belong to the crown group Chelonia), most of whose body is shielded by a special bony or cartilagenous shell developed from their ribs. Superfamily Pelomedusoidea. Superfamily Chelonioidea. Superfamily Kinosternoidea.

Superfamily Trionychoidea. Superfamily Testudinoidea.

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