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They were warm-blooded, more like modern mammals or birds than modern reptiles. They were neither cold-blooded nor warm-blooded in modern terms, but had metabolisms that were different from and in some ways intermediate between those of modern cold-blooded and warm-blooded animals. They included animals with two or three of these types of ...
Warm-blooded is a term referring to animal species whose bodies maintain a temperature higher than that of their environment. In particular, homeothermic species (including birds and mammals ) maintain a stable body temperature by regulating metabolic processes.
More primitive members of the Cynodontia are also hypothesized to have had fur or a fur-like covering based on their inferred warm-blooded metabolism. [40] While more direct evidence of fur in early cynodonts has been proposed in the form of small pits on the snout possibly associated with whiskers , such pits are also found in some reptiles ...
Dinosaurs were initially cold-blooded, but global warming 180 million years ago may have triggered the evolution of warm-blooded species, a new study found.
But scientists observed differences between the two big groups of dinosaurs, finding that Triceratops were cold-blooded and T-Rex warm-blooded.
Ichthyosaurians were air-breathing, warm-blooded, and bore live young. Many, if not all, species had a layer of blubber for insulation. Like other ancient marine reptiles, such as those in the clades Mosasauria and Plesiosauria, the genera in Ichthyosauria are not part of the clade Dinosauria. [4]
Having a lifespan of between 15 to 20 years, an Argentine Black and White Tegu differs from most other reptiles on this list because it’s one of the first known warm-blooded lizards.
Reptiles, as commonly defined, are a group of tetrapods with an ectothermic ('cold-blooded') metabolism and amniotic development. Living traditional reptiles comprise four orders : Testudines ( turtles ), Crocodilia ( crocodilians ), Squamata ( lizards and snakes ), and Rhynchocephalia (the tuatara ).