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Vor 4 Tagen · Reptiles, as commonly defined, are a group of tetrapods with an ectothermic ('cold-blooded') metabolism and amniotic development. Living reptiles comprise four orders: Testudines ( turtles ), Crocodilia ( crocodilians ), Squamata ( lizards and snakes ), and Rhynchocephalia (the tuatara ).
20. Mai 2024 · Turtles, or testudines, are reptiles of the order Testudines, characterized by a special shell developed mainly from their ribs. Modern turtles are divided into two major groups, the Pleurodira (side necked turtles) and Cryptodira (hidden necked turtles), which differ in the way the head retracts.
Vor 4 Tagen · Snakes are elongated, limbless, carnivorous reptiles of the suborder Serpentes ( / sɜːrˈpɛntiːz / ). [2] Like all other squamates, snakes are ectothermic, amniote vertebrates covered in overlapping scales. Many species of snakes have skulls with several more joints than their lizard ancestors, enabling them to swallow prey much larger than ...
9. Mai 2024 · Learn about reptiles, the class of air-breathing vertebrates with scales, amniotic eggs, and internal fertilization. Explore the diversity, evolution, and ecology of living and extinct reptiles, such as turtles, lizards, snakes, and crocodiles.
Vor 4 Tagen · Squamata ( / skwæˈmeɪtə /, Latin squamatus, 'scaly, having scales') is the largest order of reptiles, comprising lizards and snakes. With over 11,500 species, [2] it is also the second-largest order of extant (living) vertebrates, after the perciform fish.
18. Mai 2024 · Snake, any of more than 3,400 species of reptiles distinguished by their limbless condition and greatly elongated body and tail. They are classified with lizards in the order Squamata and represent a lizard that, over the course of evolution, has undergone structural reduction, simplification, and loss as well as specialization.
10. Mai 2024 · lizard, (suborder Sauria), any of more than 5,500 species of reptiles belonging in the order Squamata (which also includes snakes, suborder Serpentes). Lizards are scaly-skinned reptiles that are usually distinguished from snakes by the possession of legs, movable eyelids, and external ear openings. However, some traditional (that is ...
