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Pe=Peripheral, P1=Pleural 1, BCS=Bridge Carapace Suture. The turtle shell is made up of numerous bony elements, generally named after similar bones in other vertebrates, and a series of keratinous scutes which are also uniquely named. The ventral surface is called the plastron. [2] [3] These are joined by an area called the bridge.
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 ...
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 width of the disc is 77-86% of its length, the carapace is moderately arched, shell height is 35.0-40.5% of carapace length, the margin of the carapace is smooth and slightly flared posteriorly, the marginal bones are not united with the pleurals, the plastron is large but mostly cartilaginous, and its length is 88-97% of the carapace ...
The carapace (the upper part of the shell) ranges from brown or yellow-brown to olive in color, while the plastron (lower part of the shell) is lighter, usually white or yellow. Hatchlings usually have dark spots on the carapace, but as females age, they frequently become darker in color, or their carapace becomes splotched.
The East African black mud turtle has a smooth, domed carapace with a length of 5.1-7.9 in. The carapace is typically dark brown, gray, or black, often with yellow or dark markings on the margins. They are rather dull in color like most of their genus. The plastron is hinged. The underside of the turtle can be brown, grey, black, or yellow.
Plastron. The wood turtle usually grows to between 14 and 20 centimeters (5.5 and 7.9 in) in straight carapace length, [10] but may reach a maximum of 23.4 centimeters (9.2 in). [6] [8] It has a rough carapace that is a tan, grayish brown or brown in color, with a central ridge (called a keel) made up of a pyramidal pattern of ridges and ...