Nero is a mud eater that crawls on the bottom of the sea.

Nalox fossil was the first one discovered by Hou Xianguang in Maotian Mountain on 1 July, 19841day, which unveiled the mysterious veil of Maotian Mountain. 1985, Hou Xianguang, in cooperation with his tutor Zhang Wentang, published a paper entitled "New Discovery of Narox in Asian Continent" in the Journal of Paleontology, which was officially named "Chengjiang Fauna".

Echinococcus, an Echinococcus, has a wide and large exoskeleton with an oval structure. There is a sub-triangular tail nail in front of the head nail, which is very similar to Echinococcus kwanii, but the difference is that the profile of the latter head nail is semi-circular, and the latter's trunk consists of seven sections, each with short and weak lateral spines, while the sub-triangular tail nail has two pairs of short lateral spines. However, the head nail profile of this species is rhombic, and the trunk consists of nine sections, each with a long length. The difference between this species and helmetia expansa walcott in Burgess shale in Canada is that the latter is slightly trapezoidal, with a concave front edge and an obvious spinous front bottom angle. The trunk is composed of segments, and the spinous end of each segment is not obvious, while the sub-triangular tail nail has two pairs of short side distances, while this species is small, with a rhombic back contour, a smooth front edge without front bottom angle, and a trunk composed of nine segments.

There is a class of arthropods in Chengjiang biota, called arthropods.

Ratio of CAMBRIAN Celastrus to other Helmetia [1]

Its fossil materials are relatively scarce, and its species are Kuamaia Latahou (1987; Kuamaia muricataHou and Bergstr? m， 1997)； Nitzschia (1987); Enigma (Spears Grumachem Hou, Rumsk? Ld and Bergstr? M, 199 1) and ancient shield worms (Skioldia aldnaHou and Bergstr? M, 1997). This arthropod is considered to be the most closely related to trilobites in phylogenetic analysis, which has aroused the research interest of paleontologists.