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The ventral surface is called the plastron. [2] [3] These are joined by an area called the bridge. The actual suture between the bridge and the plastron is called the anterior bridge strut. [4] In Pleurodires the posterior pelvis is also part of the carapace, fully fused with it.
Diagram of a prawn, with the carapace highlighted in red. 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 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 ...
In many species, males have a concave plastron that interlocks with the female's carapace. In species like the Russian tortoise, the male has a lighter shell and longer legs. The high, rounded shape of box turtles are particular obstacles for mounting. The male eastern box turtle leans backward and hooks onto the back of the female's plastron. [87]
The carapace has a hydrodynamic appearance and is broad with a moderately low keel. The rear of the carapace is flared and the rear marginals form serrations. The plastron is yellowish and is marked by a central dark blotch (plastral figure) that follows the sutures of the plastral scutes and fades with age so that many adults lack a pattern ...
The generic name Sternotherus is Greek meaning hinged breast or chest, referring to the hinged plastron. [3] The trivial names, or specific epithets include: carinatus – Latin for keeled in reference to the shape of the carapace; [4] depressus – Latin for pressed down or low also referring to the shape of the carapace; [5] intermedius – Latin for intermediate, historically believed to be ...
The carapace is olive to brown in color with light yellowish markings with dark borders. The plastron color varies from cream to yellow and is patterned with dark lines along the seams in juveniles. The body color of the false map turtle is grayish brown to blackish and is marked with light brown, yellow, or whitish stripes.
The borders of the carapace are made up of peripheral and marginal scales. [4] The pygal bone sits at the posterior end of the shell, and the suprapygal sits right above it. [4] Basilemys' plastron is octagonal and elongated. [4] Like the carapace, the plastron is made up of many bony elements, and the plastron can be divided into five distinct ...