But unlike modern turtles, Proganochelys hadn't yet developed the ability to retract its head under its shell.

但与现代海龟不同的是，Proganochelys 尚未发展出将头部缩回壳下的能力。

They called it Odontochelys, and it dated to about 220 million years ago — around 10 million years before Proganochelys from Germany.

他们称它为 Odontochelys，它的历史可以追溯到大约 2.2 亿年前——比来自德国的 Proganochelys 早大约 1000 万年。