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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.
The carapace and plastron are bony structures that usually join one another along each side of the body, creating a rigid skeletal box. This box, composed of bone and cartilage, is retained throughout the turtle’s life.
The plastron, the order-defining skeletal structure for turtles, provides a bony exoskeleton for the ventral side of the turtle. We provide here the first molecular analysis of plastron bone formation.
25 Απρ 2016 · Significance The plastron, the order-defining skeletal structure for turtles, provides a bony exoskeleton for the ventral side of the turtle. We provide here the first molecular analysis of...
Definition. The plastron is the ventral (bottom) part of a turtle or tortoise shell. It provides protection to the organism's underside and houses several key anatomical features.
10 Μαΐ 2016 · The exoskeletal plastron is found in all extant and extinct species of crown turtles found to date and is synaptomorphic of the order Testudines. However, paleontological reconstructed transition forms lack a fully developed carapace and show a progression of bony elements ancestral to the plastron.
The turtle shell is composed of two primary regions: the carapace (upper shell) and the plastron (lower shell). Both carapace and plastron are overlain by epidermal scutes. These two shell regions are fused along the lateral sides of the body by “bridges.”
