Role of terrace ridges in mechanoreceptive system in trilobites: analogy study on fossil and extant arthropod cuticular sense organs

通过对三叶虫化石和现存十足类动物外骨骼梯田脊的类比和功能形态研究，阐明了其在恢复触觉刺激方向性中的机械感受作用。利用感知机制，动物可以判断目前的情况是否合适。配备了类似感知机制的三叶虫可以监测自身针对周围环境的状况，例如针对底物的情况。

Based on the analogy and functional morphology study on exoskeletal terrace ridges of fossil trilobite and extant decapod Pachygrapsus grassipes, its mechanoreceptive role to revalate directivity in touch stimula is clarified. Using the perception mechanisms, the animal could judge the present situation as suitable or not. Trilobites equipped with similar perception mechanisms could monitor the condition of itself against ambient environments, such as against substrate.