A report on the characteristics and classification of reptiles

Reptiliaturtles, snakes, lizards, and relatives Facebook By Phil Myers Reptilia Reptilia, presented as a Class in our classification, includes turtles Testudinessnakes and lizards Lepidosauriacrocodiles and their relatives Crocodiliaand birds Avesas well as a number of extinct groups. Mammals Mammalia are also amniotes, but they differ from reptiles in the structure of their skulls especially the regions associated with chewing and hearing.

A report on the characteristics and classification of reptiles

Notice the inclusion of amphibians below the crocodiles. In the 13th century the category of reptile was recognized in Europe as consisting of a miscellany of egg-laying creatures, including "snakes, various fantastic monsters, lizards, assorted amphibians, and worms", as recorded by Vincent of Beauvais in his Mirror of Nature.

A report on the characteristics and classification of reptiles

This was not the only possible classification scheme: In the Hunterian lectures delivered at the Royal College of Surgeons inHuxley grouped the vertebrates into mammalssauroids, and ichthyoids the latter containing the fishes and amphibians.

He subsequently proposed the names of Sauropsida and Ichthyopsida for the latter two groups. The terms "Sauropsida" "lizard faces" and " Theropsida " "beast faces" were used again in by E.

Reptile - Wikipedia

Goodrich to distinguish between lizards, birds, and their relatives on the one hand Sauropsida and mammals and their extinct relatives Theropsida on the other. Goodrich supported this division by the nature of the hearts and blood vessels in each group, and other features, such as the structure of the forebrain.

According to Goodrich, both lineages evolved from an earlier stem group, Protosauria "first lizards" in which he included some animals today considered reptile-like amphibiansas well as early reptiles. He also reinterpreted Sauropsida and Theropsida to exclude birds and mammals, respectively.

Thus his Sauropsida included ProcolophoniaEosuchiaMillerosauriaChelonia turtlesSquamata lizards and snakesRhynchocephaliaCrocodilia" thecodonts " paraphyletic basal Archosaurianon- avian dinosaurspterosaursichthyosaursand sauropterygians.

BIOLOGY DEAN: REPTILIA: REPTILES CHARACTERISTICS-CLASSIFICATION

The traits listed by Lydekker infor example, include a single occipital condylea jaw joint formed by the quadrate and articular bones, and certain characteristics of the vertebrae. Ichthyosaurs were, at times, considered to have arisen independently of the other euryapsids, and given the older name Parapsida.

Parapsida was later discarded as a group for the most part ichthyosaurs being classified as incertae sedis or with Euryapsida. However, four or three if Euryapsida is merged into Diapsida subclasses remained more or less universal for non-specialist work throughout the 20th century.

It has largely been abandoned by recent researchers: By the early 21st century, vertebrate paleontologists were beginning to adopt phylogenetic taxonomy, in which all groups are defined in such a way as to be monophyletic ; that is, groups include all descendants of a particular ancestor.

The reptiles as historically defined are paraphyleticsince they exclude both birds and mammals. These respectively evolved from dinosaurs and from early therapsids, which were both traditionally called reptiles. Mammals are a cladeand therefore the cladists are happy to acknowledge the traditional taxon Mammalia ; and birds, too, are a clade, universally ascribed to the formal taxon Aves.

Mammalia and Aves are, in fact, subclades within the grand clade of the Amniota. But the traditional class Reptilia is not a clade.

It is just a section of the clade Amniota:Glossary of scientific terms related to reptiles, amphibians, and arthropods used in herpetology, entomology, and by hobbyist for snakes, frogs, turtles, spiders, lizards, amphibians, scorpion and more.

Jul 26,  · Vertebrates are further classified into fish, amphibians, reptiles, birds, and mammals. Come and learn what makes animals a part of these groups in this fun, kid-friendly video!

Like this video if. Size of Green Tree Frog: Length of the medium sized ones is up to 6 cm which forms their average size. Color of Green Tree Frog: These species are found in contrasting colors. Their color may range from yellow olive to lime green.

The tone of their skin color abruptly . A companion piece to 'Amazing Animals,' this lesson is designed to teach English language learners in grades about animal classification. It features more . Reptilia, presented as a Class in our classification, includes turtles, snakes and lizards (Lepidosauria), crocodiles and their relatives (Crocodilia), and birds, as well as a number of extinct groups.

Reptiles (including birds!) are amniotes; that is, their eggs are protected from dessication and other environmental problems by an extra.

Reptiles Characteristics and Classification There are more than 8, living species of reptiles, and they are placed in four orders: Crocodilia, which includes crocodiles and alligators; Sphenodontia, or tuataras; Squamata, which includes lizards and snakes; and Testudines, such as turtles and tortoises.

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