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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 ...
Other common names for P. fasciatus include blue-tailed skink (for juveniles) and red-headed skink (for adults). It is technically appropriate to call it the American five-lined skink to distinguish it from the African skink Trachylepis quinquetaeniata (otherwise known as five-lined mabuya) or the eastern red-headed skink to distinguish it from its western relative Plestiodon skiltonianus ...
The body of the lizard is dark green with rings of yellow spots. [12] The tail is banded yellow and black and is extremely long. Its teeth are long, straight, and sharp. Its claws are prominent and strongly curved. [13] Males reach a considerably larger size than females in both weight and length, and also tend to have a more robust head. [7]
Lizard morphological and ecological diversity substantially increased over the course of the Cretaceous. [56] In the Palaeogene, lizard body sizes in North America peaked during the middle of the period. [57] Mosasaurs likely evolved from an extinct group of aquatic lizards [58] known as aigialosaurs in the Early Cretaceous.
Like most lizards, geckos can lose their tails in defence, a process called autotomy; the predator may attack the wriggling tail, allowing the gecko to escape. [ 8 ] The largest species, Gigarcanum delcourti , is only known from a single, stuffed specimen probably collected in the 19th century found in the basement of the Natural History Museum ...
In glass lizards, the tail can be up to three quarters of their body length. The slender glass lizard, which is usually tan or brown with long stripes along the length of its body, can grow as ...
It was a small, lizard-like animal, about 20 to 30 centimetres (7.9 to 11.8 in) long, with numerous sharp teeth indicating an insectivorous diet. [40] Other examples include Westlothiana (for the moment considered a reptiliomorph rather than a true amniote) [41] and Paleothyris, both of similar build and presumably similar habit.
Tuatara are greenish brown and grey, and measure up to 80 cm (31 in) from head to tail-tip and weigh up to 1.3 kg (2.9 lb) [10] with a spiny crest along the back, especially pronounced in males. They have two rows of teeth in the upper jaw overlapping one row on the lower jaw, which is unique among living species.