Sting a stiff pointed spine , integumentary sheath , and accompanying venom glands .

一根硬的尖棘，具外皮鞘，而且伴随著毒腺。

Which is why dr zheng was stunned to find on tianyulong confuciusi what are conservatively described in her paper as " long , singular and unbranched filamentous integumentary structures " .

而这就是为什么郑博士在发现孔子天宇龙的时候感到迷茫的原因，在她的报告中保守地描述到“长的，单一而未分叉的丝状结构”。