The big-headed black turtle
The appearance of the big-headed black turtle is similar to that of a grass turtle , even the color of the carapace is very similar, this is a turtle species that is easily confused by people, but if you can understand the characteristics of this turtle, it will not be particularly difficult to distinguish.
1 cervical scute, in the shape of a small long strip or a small inverted bell shape, 5 pairs of vertebral shields, 4 pairs of costal shields, 11 pairs of rostral shields, and short plastron On the carapace, the front beak is flat, the back beak is deeply concave, the ventral scute suture or thoracic scute suture is the longest, the humeral scute is the shortest, and the common core pattern of each scute is clear. The back of the head is olive color, and the rest is blue-gray. There are intermittent multiple light yellow lines with black and gray edges on the side of the head along the postorbital beak and back. Some of them are in the shape of a semicircle at the full membrane. Yes, there are also irregular lines on the throat. The yellow lines extend along the neck to the back on both sides. The carapace is chestnut brown or slightly black, with 3 longitudinal ridges, and the ridges are obvious and brown-black. The color of the nail bridge and plastron is generally brown-black or has irregular yellow spots. The radiating stripes of the plastron do not have an obvious cloudy feeling. The hands, feet and other soft skin parts of the body are gray-black.
The head is large and triangular in shape, and the back of the head is covered with a large horny hard shell. The upper beak is hooked in the shape of an olecranon, the eyes are large, and there is no external ear membrane. The carapace is brown, oblong and flat in the center, with no teeth on the front and rear edges. The plastron is olive-colored, small and flat. The dorsal and plastronal carapace is connected by a tough band and has lower edge angular plates. The hands and feet are gray with tile-like scales, and the hind limbs are long. The outer fingers and toes have sharp long claws, and there are semi-webs between the fingers and toes, which are not only convenient for crawling on the mainland, but also convenient for swimming in the water.
The tail is long, each exceeding the length of its own carapace, and the tail is covered with short annular scales. This turtle's head, hands and feet cannot be retracted into the plastron, making it one of the more unique turtles known in China.
Other characteristics:
1. The carapace is spindle-shaped, The ridge is obvious and brown-black
2. The width of the head is 1/3-1/2 of the width of the front edge of the nail, and the back of the head is olive color
3. Kiss tipIt is almost in a straight line downward with the edge of the jaw. The jaw is simple and thick, and the eyes are big
4. There are many intermittent strips of black and gray on the head side along the post-orbital edge backward. Light yellow lines on the edges
5. The color of the nail bridge and plastron is generally brown and black, with no obvious radioactive stripes, and some are completely black.
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