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Vor 3 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 ). As of May 2023, about 12,000 living species ...
Vor 2 Tagen · Squamata ( / skwæˈmeɪtə /, Latin squamatus, 'scaly, having scales') is the largest order of reptiles, comprising lizards and snakes. With over 12,162 species, [3] it is also the second-largest order of extant (living) vertebrates, after the perciform fish.
Vor 2 Tagen · The tuatara (Sphenodon punctatus) is a species of reptile endemic to New Zealand. Despite its close resemblance to lizards, it is part of a distinct lineage, the order Rhynchocephalia. The name tuatara is derived from the Māori language and means "peaks on the back".
Vor 5 Tagen · Classified with lizards in the order Squamata, snakes represent a lizard that, over the course of evolution, has undergone structural reduction, simplification, and loss as well as specialization. All snakes lack external limbs, but not all legless reptiles are snakes.
- The four different ways that snakes move are serpentine locomotion, “concertina” locomotion, “caterpillar” or “rectilinear” locomotion, and sidewin...
- Snakes have no external ears, but they retain a few vestiges of an internal ear, which are connected to other skull bones in such a way as to permi...
- The rate of growth in snakes is correlated with the availability of food and temperatures high enough to permit full metabolic activity. When all f...
- For molting in snakes, the replacement cells for the skin grow on the same cycle and cohere into a complete unit. When this unit is functional, the...
- Snakes differ from other reptiles in being limbless and having a greatly elongated body and tail. Snakes also lack movable eyelids and external ear...
Vor 2 Tagen · Dinosaur, the common name given to a group of reptiles, often very large, that first appeared roughly 245 million years ago and thrived worldwide for nearly 180 million years. Most died out by the end of the Cretaceous Period. Many lines of evidence show that one lineage evolved into birds about 155 million years ago.
- Dinosaurs are a diverse group of reptiles that were the dominant terrestrial life form on Earth during the Mesozoic Era, about 245 million years ag...
- The decline of dinosaurs was most likely caused by many different factors. A popular theory is that an asteroid crashed into the Yucatán Peninsula...
- Some species of dinosaurs, such as the dromaeosaur, have fossil records of their feathers. Early feathers were not evolved for flight; instead, sci...
- It is generally accepted that modern birds are descendents of dinosaurs. Evidence for this theory first arose from the fossil records of the Archae...
- Although estimates vary, one of the contenders for the largest dinosaur is the Argentinosaurus. Discovered in Argentina in 1987, the Argentinosauru...
- Dinosaur fossils and tracks have been discovered throughout human history. The first description of dinosaurs as a separate group of life forms (kn...
Vor 3 Tagen · Triassic Period - Reptiles, Mammals, Evolution: On land the vertebrates are represented in the Triassic by labyrinthodont amphibians and reptiles, the latter consisting of cotylosaurs, therapsids, eosuchians, thecodontians, and protorosaurs. All these tetrapod groups suffered a sharp reduction in diversity at the close of the Permian ...
Vor einem Tag · Reptile Decor: It’s What’s on the Inside That Counts. Your enclosure will need substrate, or material that lines the bottom of the terrarium. Depending on your pet’s species, this could mean ‘carpet’, wood chips, moss, sawdust, or soil. This will require replacement every so often to keep your pet’s home clean.
