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The plastron (plural: plastrons or plastra) is the nearly flat part of the shell structure of a turtle, what one would call the belly or ventral surface of the shell. It also includes within its structure the anterior and posterior bridge struts and the bridge of the shell.
Oracle bones are pieces of ox scapula and turtle plastron which were used in pyromancy – a form of divination – during the Late Shang period (c. 1250 – c. 1050 BCE) in ancient China. Scapulimancy is the specific term if ox scapulae were used for the divination, plastromancy if turtle plastrons were used. A recent count estimated that ...
A carapace is a dorsal (upper) section of the exoskeleton or shell in a number of animal groups, including arthropods, such as crustaceans and arachnids, as well as vertebrates, such as turtles and tortoises. In turtles and tortoises, the underside is called the plastron.
The turtle’s shell is made of bone – or more accurately bones. At least 50 bones make up the shell, which consists of the domed carapace at the top, and a flatter plastron covering the belly ...
Turtle shells are made mostly of bone; the upper part is the domed carapace, while the underside is the flatter plastron or belly-plate. Its outer surface is covered in scales made of keratin , the material of hair, horns, and claws.
The carapace is leathery and pliable, particularly at the sides. The central part of the carapace has a layer of solid bone beneath it, as in other turtles, but this is absent at the outer edges. Some species also have dermal bones in the plastron, but these are not attached to the bones of the shell. The light and flexible shell of these ...
It was traditionally made from the gao, or paste of the plastron (bottom shell) from the turtle Cuora trifasciata (commonly known as "three-lined box turtle", or "golden coin turtle", 金錢龜) [1] and a variety of herbal products, in particular, China roots Smilax glabra (土伏苓, Tu fu ling).
The smooth softshell turtle, as with all softshells, has a smooth, fairly soft, flexible, leather-like carapace that is covered by "skin", as opposed to the hard scutes commonly associated with most turtle species. [6] The plastron is light white or gray, with no notable markings (other than occasional spotting), and its internal anatomy (bones ...