Myllokunmingia is a chordate from the Lower Cambrian Maotianshan shales of China, thought to be a vertebrate, although this is not conclusively proven. It is 28 mm long and 6 mm high. It is among the oldest possible craniates, found in the lower Cambrian Chengjiang ([ ] million years ago). It appears to have a skull and skeletal structures made of cartilage. There is no sign of mineralization of the skeletal elements (biomineralization). Only one species is known - Myllokunmingia fengjiaoa (Shu, Zhang & Han). Related creatures are Haikouichthys and Zhongjianichthys.