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The integument, or body covering, of Psittacosaurus is known from a Chinese specimen, SMF R 4970, which most likely comes from the Yixian Formation of Liaoning Province, China. The specimen, which is not yet assigned to any particular species, was likely illegally exported from China and was purchased in 2001 by the Senckenberg Museum in Germany .
The tall skull and round teeth of a Nile monitor Skull anatomy of Varanus exanthematicus (2nd row on the left) compared with other Varanoids White-throated monitor Nile monitor The genus Varanus is believed to have originated in South Asia , and the anatomy of its earliest members are thought to resemble modern members of Empagusia , such as ...
Varanus varius has the typical body built of a true monitor. True monitors are characterized by their wide skulls and strong jaws, with the nostrils cranially positioned on the sides of their snout. Their teeth are curved, serrated and concealed by thick lips, making them invisible even if their mouths are open.
An adult salamander generally resembles a small lizard, having a basal tetrapod body form with a cylindrical trunk, four limbs, and a long tail. Except in the family Salamandridae, the head, body, and tail have a number of vertical depressions in the surface which run from the mid-dorsal region to the ventral area and are known as costal ...
The optimal body temperature for the tuatara is from 16 to 21 °C (61 to 70 °F), the lowest of any reptile. [80] The body temperature of tuatara is lower than that of other reptiles, ranging from 5.2–11.2 °C (41.4–52.2 °F) over a day, whereas most reptiles have body temperatures around 20 °C (68 °F). [81]
If juveniles have fewer legs than adults, then the animal is listed by the number of legs recorded in mature adults. If this number varies among adults within the taxon, then this variation is described in parenthetical note. In counting legs, this list follows the conventions adopted in the relevant literature.
Zimmerman and Tracy (1989) found that lower body temperatures decreased the rate at which food passes through the digestive system in the chuckwalla (Sauromalus obsesus). [12] Additionally, it was believed that herbivory was found only in large lizards (>300g). [30] A large body size would encourage a higher and more stable body temperature, on ...
Argentine black and white tegu lizards are typically hatched at the beginning of spring. When they hatch they are about ten grams and grow up to eight kilograms within four or five years, experiencing a nearly eight-hundred-fold increase in body size. During this time their diet changes from insects to small vertebrates, eggs, carrion, and fruits.