Period: Early Cambrian 518MA Origin: China, Yunnan, Chengjiang biota Size: 2 cm Top quality of Leanchoilia. Not only keep beautiful body, but also keep its appendages clearly. The four appendages are the tool for Leanchoilia to eat. They’re really hard to keep in the fossil. Leanchoilia is an megacheiran arthropod known from Cambrian deposits of the Burgess Shale in Canada and the Chengjiang biota of China. It had long, whip-like feelers mounted on frontal arm-like appendages. Its internal organs are occasionally preserved within the substrate in three dimensions.