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The scales may be ossified or tubercular, as in the case of lizards, or modified elaborately, as in the case of snakes. [ 1 ] The scales on the top of lizard and snake heads has also been called pileus , after the Latin word for cap, referring to the fact that these scales sit on the skull like a cap.
Reptile scale types include: cycloid, granular (which appear bumpy), and keeled (which have a center ridge). Scales usually vary in size, the stouter, larger scales cover parts that are often exposed to physical stress (usually the feet, tail and head), while scales are small around the joints for flexibility.
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Squamata (/ s k w æ ˈ m eɪ t ə /, Latin squamatus, 'scaly, having scales') is the largest order of reptiles, comprising lizards and snakes.With over 12,162 species, [3] it is also the second-largest order of extant (living) vertebrates, after the perciform fish.
Non-European lizards such as Sphaerodactylus macrolepis also display keeled scales. [3] Klauber (1997) describes how the keels on the scales of Crotalus rattlesnakes are particularly strong mid-dorsally, but gradually weaken on the lateral rows with the ventral scales being smooth. He then references a 1938 study, stating that it "has suggested ...
These points are then used to split up the space into small, randomly tiled regions called cells. These cells often look like "lizard scales", "pebbles", or "flagstones". Even though these regions are discrete, the cellular basis function itself is continuous and can be evaluated anywhere in space. [5] Worley noise is a common type of cellular ...
Komodo dragon skin is reinforced by armoured scales, which contain tiny bones called osteoderms that function as a sort of natural chain-mail. [ 30 ] [ 31 ] The only areas lacking osteoderms on the head of the adult Komodo dragon are around the eyes, nostrils, mouth margins, and parietal eye , a light-sensing organ on the top of the head.
Common rough-scaled lizards are medium-sized lizards each with a small head, body, and a long tail. The frontonasal is divided and has small body scales in 42 to 58 rows at the midline. [2] The backs of these lizards are brownish grey with narrow dark blotches and rows of pale spots. [2]