Palaeolenus Trilobites Death Assemblage from Chengjiang

This trilobite assemblage is a group of members of the Order Ptychopariida from the Early Cambrian Heilinpu Formation deposits of the Caijiachong Valley, Yunnan Province, China, known as Palaeolenus.

This is a well-preserved grouping of trilobites from the Chengjiang Biota that made up a glimpse of the Cambrian Explosion some 5-10 million years before the Burgess Shale fauna came into being.