Turtle Link

Pappochelys is critical for understanding “a new stage in the evolution of the turtle body plan,” the researchers write. Prior to this discovery, a 220-million-year-old specimen from China, which displayed a partly formed shell and other turtle-like features, was the closest thing experts had to a seemingly sure-fire turtle relative. Other specimens, including a 260-million-year-old fossil from South Africa, were hypothesized to represent an even earlier turtle ancestor, but with such a large temporal gap separating them from the China specimen, researchers could not say for sure. Morphologically and chronologically, Pappochelys fits neatly between the two specimens, tying them together.…