plastral การใช้

• Comparison of the plastral formulas provides distinction between the two species.
• In older individuals this results in a complex plastral pattern of irregular dark markings.
• The plastral scutes join along a central seam down the middle of the plastron.
• Males do not exhibit plastral concavity.
• The plastral hinge may also play a significant role in facilitating egg-laying in adult females.
• Males also have more lightly coloured bellies, though they do not exhibit the plastral concavity that many other tortoise species do.
• For example, for the eastern box turtle, the plastral formula is : an > abd > gul > pect > hum > < fem
• The most notable difference to the nominate race is the distinct plastral pattern, where only smaller black blotches ( sometimes none at all ) occur.
• A particular variation is the Pleurodiran turtles have an intergular scute between the gulars at the front, giving them a total of 13 plastral scutes.
• These more-or-less symmetrically arranged plastral spots may merge to one dark central spot, but a yellow border to the plastron often remains.
• The expedition yielded one male Arakan forest turtle, with a carapace length of 22 . cm, a mass of 1.3 kg, and 18 plastral annuli.
• The plastron can have a dark or light ( tan to yellow ) background which can be uniform or patterned with fine lines radiating from the center of each plastral scute.
• Unlike the closely related " Cuora ", which can completely close its shell because of the hinge, " Cyclemys " plastral hinges only close the shell partially.
• ""'Colossoemys " "'is an extinct genus of pubis, and a plastral fragment ( likely to be from a turtle rather than a crocodilian ).
• A distinguishing characteristic of the genus is the secondary division of the abdominal scutes ( the middle pair of scutes in the plastron ) due to the development of the plastral hinge as the turtle matures.
• Adults of " Cyclemys " also develop a joint in the middle of their plastrons ( known as a plastral hinge ), enabling them to articulate the front and rear halves to some extent.
• The variants south of the Amazon are generally both larger and smaller than the holotype, have a very different plastral pattern, and have an enlarged scale or'spur'on the inside of the fore limb elbow.