Brazilian snake-necked turtles
Snake-necked turtles are a family of ancient turtles , the carapace is round or heart-shaped. The shell is thicker, there is no ventral carapace, and there is a laryngeal shield or a lower marginal shield. Existed from the Late Jurassic to the Early Cretaceous. The snake-necked turtles and Tianfu turtles mainly found in Europe, Asia, Sichuan and other places in China belong to this category.
The back shell of the Brazilian snake-necked turtle has a healthy keel, and there are black or yellow freckles around the head. Female turtles are larger than male turtles. The center of the male turtle's plastron is concave, the anal shield is deeply notched, the tail is long, and the cloaca hole is farther from the carapace; the female turtle's plastron is flat. The eggs are oblong, often with a long diameter of 34 mm and a short diameter of 20 mm.
Most common turtles have very small cervical shields, located between the first and second marginal shields, but the nail-necked turtle is unique. The cervical scute is larger and located behind the first and second marginal scutes and in front of the first vertebral scute. Its head and neck are brightly colored and have ever-changing stripes.
This type of turtle does not retract the head and neck into the shell like other common turtles. Instead, when the head retracts into the shell, the neck The head is bent to one side, hence its name (snake-necked turtles of the family Tritonidae also have this habit). There is only one species of this genus. The body is gray and the body is 30 cm long.
</p>
</p>