Ad
related to: how do scutes form video for preschoolers activities
Search results
Results From The WOW.Com Content Network
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 .
Overlying the boney elements are a series of scutes, which are made of keratin and are a lot like horn or nail tissue. In the center of the carapace are five vertebral scutes and out from these are four pairs of costal scutes. Around the edge of the shell are 12 pairs of marginal scutes.
[8] [9] The outer shell is composed of ossified dermal scutes covered by nonoverlapping, keratinized epidermal scales, which are connected by flexible bands of skin. This armor covers the back, sides, head, tail, and outside surfaces of the legs.
Typically, a turtle has 38 scutes on the carapace and 16 on the plastron, giving them 54 in total. Carapace scutes are divided into "marginals" around the margin and "vertebrals" over the vertebral column, though the scute that overlays the neck is called the "cervical". "Pleurals" are present between the marginals and vertebrals. [20]
Snake scales may be modified to form fringes, as in the case of the eyelash bush viper, Atheris ceratophora, or rattles as in the case of the rattlesnakes of North America. [ 8 ] Certain primitive snakes such as boas , pythons and certain advanced snakes such as vipers have small scales arranged irregularly on the head.
This species can be recognized by its black or brown oval carapace (upper shell) with distinctive low keels on the second and third scutes. Yellow spots on the side of its head give this species its common name. These spots are most prominent in juveniles and fade with age. Females can be up to twice the size of males.
(Reuters) -A judicial policymaking body on Thursday rejected a request by Democratic lawmakers to refer conservative U.S. Supreme Court Justice Clarence Thomas to the Department of Justice to ...
Squamata and Rhynchocephalia form the subclass Lepidosauria, which is the sister group to the Archosauria, the clade that contains crocodiles and birds, and their extinct relatives. Fossils of rhynchocephalians first appear in the Early Triassic , meaning that the lineage leading to squamates must have also existed at the time.