乌龟进化论的最大BUG，为何成为生物学家们的噩梦2

The fossil of the half-armor turtle challenges the conventional theory on turtle shell evolution， suggesting that abdominal armor developed before the back. The ancient元鄂龟化石， from the late Triassic， with similar modern turtle-like features， adds complexity to the understanding of turtle origins. It highlights the ongoing debate among biologists about the precise sequence of turtle shell development and connects it to other extinct species like pelycosaurs.