Is Chelonia and Testudines the same?


What is a chelonian turtle?

The term chelonian is used as a formal name for members of the group. The largest living species of turtle (and fourth-largest reptile) is the leatherback turtle which can reach over 2.7 m (8 ft 10 in) in length and weigh over 500 kg (1,100 lb).

What is the difference between Chelonian and testudine?

Chelonia is based on the Greek word for turtles, χελώνη chelone; Greek χέλυς chelys “tortoise” is also used in the formation of scientific names of chelonians. Testudines, on the other hand, is based on the Latin word for tortoise, testudo. Terrapin comes from an Algonquian word for turtle.

What is the scientific name of Chelonia?

Chelonia is an alternate name for Testudines. The word ‘ Testudines ‘ is based on the Latin word for tortoise – testudo. This reptile order contains turtles, terrapins, and tortoises. All species under this order have a hard carapace (cartilaginous shell) covering their bodies.

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How many species of Testudines are there?

The order Testudines includes both extant (living) and extinct species. The earliest known members of this group date from 220 million years ago, making turtles one of the oldest reptile groups and a more ancient group than snakes or crocodilians. Of the 356 known species alive today, some are highly endangered.

What is the other name of the Chelonian order?

The order has also been historically known as Chelonii ( Latreille 1800) and Chelonia (Ross and Macartney 1802) which are based on the Ancient Greek word for tortoise: χελώνη ( chelone ). Testudines is the official order name due to the Principle of Priority. The term chelonian is used as a formal name for members of the group.

What is the meaning of testudine?

Any of various aquatic or terrestrial egg-laying reptiles of the order Testudines , having horny toothless jaws and a bony or leathery shell into… Testudine – definition of Testudine by The Free Dictionary

How many Testudines are in the family testudine?

There are fourteen extant families of the order Testudines, an order of reptile known as turtles. The testudines are some of the most ancient reptiles alive, with only the tuataras considered more primitive.

Why is Chelonia mydas included in the Invasive Species Compendium?

It is included in the Invasive Species Compendium because of the threat posed by some invasive species. Chelonia mydas is the second largest extant species of marine turtle and has a pan-global tropical and subtropical distribution.

What is the reptile order?

As the name indicates, this reptile order contains reptiles such as crocodiles, alligators, caimans, and gavials. These mostly giant, predatory, semiaquatic reptiles are also known as crocodilians. They first appeared about 95 million years ago in the Late Cretaceous period and are the closest relatives to birds.

How many species of green turtles are in the genus Chelonia?

The genus Chelonia contains only one living species the green turtle Chelonia mydas mydas (Linne’) that also has a Pacific–Mexican population that is considered by some researchers as a subspecies or race, the Pacific green turtle or black turtle, Chelonia mydas agassizi (Bocourt).

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What is the scientific name for Chelonian?

Science definitions for chelonian. chelonian. Any of various reptiles of the order Chelonia (or Testudines), which includes the turtles and tortoises. Chelonians lack teeth and usually have a hard shell that protects the body and consists of bony plates fused to the vertebrae and ribs.

What is a chelonian reptile?

chelonian- a reptile of the order Chelonia chelonian reptile anapsid, anapsid reptile- primitive reptile having no opening in the temporal region of the skull; all extinct except turtles order Chelonia, order Testudinata, order Testudines, Testudinata, Testudines, Chelonia- tortoises and turtles

‘In terms of molecular structure, the researchers found the order Testudines to be closely related to the more recently evolved order Crocodilia.’ Modern Latin (plural), based on Latin testa ‘shell’.

How many species of testudine turtles are there?

The Testudines reached its greatest diversity by the end of the Cretaceous. Today only 260 species representing 13 families survive. Although turtles are abundant in the tropics, they also are quite diverse in temperate regions and have been recorded in Arctic waters.

What is the taxon name for a turtle?

‘All turtles are placed within the order Testudines.’ ‘All these taxa are relevant to the history of the conquest of land by vertebrates because they are outside the large clades of extant tetrapods (Apoda, Caudata, Anura, Mammalia, Testudines, Sauria).’ ‘The first formal use of the word Testudines as a taxon name can be found in Batsch.’

What is another name for a testudine turtle?

Other Names for Testudines Chelonia Chelonii Testudinata Turtles, tortoises and terrapins References Bickham, J.W. and J.L. Carr. 1983. Taxonomy and phylogeny of the higher categories of cryptodiran turtles based on a cladistic analysis of chromosomal data.

What is chleonia mydas?

The growth of immature green turtles (Chleonia mydas) under natural conditions. Herpetologica, 36:162-165. Lombard CD, 2006.

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Are gonadotropins and steroids associated with breeding activities in green sea turtles?

Serum gonadotropins and steroids associated with breeding activities in the green sea turtle, Chelonia mydas. I. Captive animals. General and Comparative Endocrinology, 39:274-289. Limpus CJ, 1982. The status of Australian sea turtle populations. In: Bjorndal, K, ed. Biology and Conservation of Sea Turtles.

What kind of tumors do Chelonia mydas have?

Eggs being laid by Chelonia mydas. Hawaiian green turtle (Chelonia mydas) severely afflicted with Fibropapillomatosis (FP) tumours. The mouth tumors, which are unique to Hawaiian greens, can occur inside the mouth and throat, impairing both breathing and feeding. Eye tumors impair vision and can blind the turtle.

How many green turtles (Chelonia mydas) with detachable legs?

In this study, we fitted 18 green turtles (Chelonia mydas) with detachable… Tracks the implementation of recovery actions from Endangered Species Act…

What is the evolution of the green turtle?

The green turtle is a unique and highly evolutionarily distinct species. The green turtle is the only species in its genus and diverged from all other living turtles more than 30 million years ago. This is around the time humans last shared a common ancestor with baboons! Unfortunately, this species suffering a drastic population decline.

How many species of chelonians are there in the world?

There are over 285 different species of chelonians in the world. 1 Chelonians represent one of the most unique and recognizable groups of animals in the world.

What is the Chelonian skull?

The chelonian beak consists of an upper keratinized horny beak, known as the rhamphotheca, which overlies the maxilla. The horny beak attaches to the mandibular ramus at the dentary and contains no dentition. 2 Unlike in mammals, the chelonian skull is devoid of articulations, except at the jaw. 58 The skull also lacks true temporal openings.

What is the renal system in chelonians?

Renal System Chelonians have two large, flat, lobulated kidneys that are located in the retrocoleomic cavity, ventral to the caudal lung fields and cranial to the pelvic girdle.