Turtle
Fossils of the freshwater Odontochelys semitestacea or "half-shelled turtle with teeth", from the later Triassic, were found in southwest China. Odontochelys shows a complete bony plastron and an incomplete carapace. This is similar to turtles in an early stage of embryonic development. By the Upper Jurassic, turtles had radiated widely, and their fossil history becomes easier to read.