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Salamanders lack claws, have scale-free skins, either smooth or covered with tubercles, and tails that are usually flattened from side to side and often finned. They range in size from the Chinese giant salamander ( Andrias davidianus ), which has been reported to grow to a length of 1.8 metres (5 ft 11 in), [ 51 ] to the diminutive Thorius ...
Tegulae resemble a squirrel's claws and help with movement through trees. [2] [5] The white hair on the back of the head and neck inspire its common name, "cotton-top". The cotton-top tamarin has a long sagittal crest, consisting of white hairs, from forehead to nape flowing over the shoulders. The skin of the face is black with gray or white ...
The evolution of tetrapods began about 400 million years ago in the Devonian Period with the earliest tetrapods evolved from lobe-finned fishes. [1] Tetrapods (under the apomorphy-based definition used on this page) are categorized as animals in the biological superclass Tetrapoda, which includes all living and extinct amphibians, reptiles, birds, and mammals.
A rattail is a hair style that is characterized by a long "tail"-like element of hair growing downward from the back of the head. The rattail usually hangs naturally; however, it can be braided, treated as a dread, permed, straightened, poofed, or curled with an iron. In some instances, an individual might choose to grow several tails as ...
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 frilled lizard grows to a total length of around 90 centimetres (35 in) and a head-body length of 27 cm (11 in), and weighs up to 600 g (1.3 lb). [10] [12] [13] It has a particularly large and wide head; a long neck to accommodate the frill; long legs and a tail that makes most of its total length.
S. heros var. castaneiceps found in Oklahoma, with red head and black body. S. heros is the largest centipede in North America. [2] It has an average length of 6.5 inches (170 mm), but can reach up to 8 in (200 mm) in the wild, [3] and even longer in captivity. [4] Its trunk bears either 21 or 23 pairs of legs. [5] [6]
The "tail" in the name is actually an extension of the male cloaca. The tail is one of two distinctive anatomical features adapting the species to life in fast-flowing streams. These are the only North American frog species that reproduce by internal fertilization. [3] They are among the most primitive known families of frogs.