Chengjiangocaris is an extinct genus of a shrimp-like arthropod that lived during the Cambrian. The genus is a type of fuxianhuiid, which are basal euarthropods. Five 520 million-year-old fossil specimens of C. kunmingensis were excavated in southern China and first reported in 2013 by and his colleagues. One specimen shows detailed evidence of a nervous system, "the fossil may be the oldest and most detailed example of a central nervous system yet identified, with even individual nerves -- rarely preserved soft tissue -- visible enough to study."