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Discarded exoskeleton of dragonfly nymph Exoskeleton of cicada attached to a Tridax procumbens (colloquially known as the tridax daisy)An exoskeleton (from Greek έξω éxō "outer" [1] and σκελετός skeletós "skeleton" [2] [3]) is a skeleton that is on the exterior of an animal in the form of hardened integument, which both supports the body's shape and protects the internal organs ...
Lizard head scales, from Boulenger 1890: 168. [3]Lizard scales vary in form from tubercular to platelike, or imbricate (overlapping). These scales, which on the surface are composed of horny (keratinized) epidermis, may have bony plates underlying them; these plates are called osteoderms.
Second, most lepidosaurs have the ability to autotomize their tails. However, this trait has been lost on some recent species. In lizards and rhynchocephalians, fracture planes are present within the vertebrae of the tail that allow for its removal. Some lizards have multiple fracture planes, while others just have a single fracture plane.
Glass lizards have small scales on their undersides. The tails of glass lizards are relatively larger than snakes’ tails. In glass lizards, the tail can be up to three quarters of their body length.
Horned lizards (Phrynosoma): These lizards have horns on their heads which have a hard keratin covering over a bony core, like mammalian horns. Insects: Some insects (such as rhinoceros beetles) have hornlike structures on the head or thorax (or both). These are pointed outgrowths of the hard chitinous exoskeleton.
A skeleton is the structural frame that supports the body of most animals.There are several types of skeletons, including the exoskeleton, which is a rigid outer shell that holds up an organism's shape; the endoskeleton, a rigid internal frame to which the organs and soft tissues attach; and the hydroskeleton, a flexible internal structure supported by the hydrostatic pressure of body fluids.
Horned lizards mostly hunt out in the open, licking up ants and other insects with their sticky tongues. However, this also makes the lizards easy targets for predators like roadrunners, coyotes ...
Lizard is the common name used for all squamate reptiles other than snakes (and to a lesser extent amphisbaenians), encompassing over 7,000 species, [1] ranging across all continents except Antarctica, as well as most oceanic island chains.