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Scutes on an alligator foot. A scute (/ s k j uː t / ⓘ) or scutum (Latin: scutum; plural: scuta "shield") is a bony external plate or scale overlaid with horn, as on the shell of a turtle, the skin of crocodilians, and the feet of birds.
Scutes on a crocodile. Reptile skin is covered with scutes or scales which, along with many other characteristics, distinguish reptiles from animals of other classes. They are made of alpha and beta-keratin and are formed from the epidermis (contrary to fish, in which the scales are formed from the dermis).
The scales and scutes of birds were thought to be homologous to those of reptiles, [4] but are now agreed to have evolved independently, being degenerate feathers. [ 5 ] [ 6 ] Carcharodontosaurid theropod dinosaur Concavenator , is known to have possessed these feather-derived tarsal scutes.
It is theorized that these scutes are most likely modified osteoderms that evolved over time to become the protective shell that we see today. [9] The difference between scutes and scales is that scutes actually form in the lower, vascularized dermis, with the epidermal layer creating only the top surface. Scales on the other hand, form in the ...
For example, in Myanmar, the presence or absence of loreal scales can be used to distinguish between relatively harmless Colubrids and lethally venomous Elapids. [32] The rule of hand for this region is that the absence of a loreal scale between the nasal scale and pre-ocular scale indicates that the snake is an Elapid and hence lethal. [32]
On the plastron there are two gular scutes at the front, followed by a pair of pectorals, then abdominals, femorals and lastly anals. A particular variation is the Pleurodiran turtles have an intergular scute between the gulars at the front, giving them a total of 13 plastral scutes. Compared to the 12 in all Cryptodiran turtles. [3] [11]
Scutella – scales that are not quite as large as scutes, such as those found on the caudal, or hind part, of the chicken metatarsus. Scutes – the largest scales, usually on the anterior surface of the metatarsus and dorsal surface of the toes. The rows of scutes on the anterior of the metatarsus can be called an "acrometatarsium" or ...
3 What's the difference? 7 comments. 4 Turtles. 3 comments. 5 Pangolins. 1 comment. Toggle the table of contents. Talk: Scute. Add languages.