Guanshan biota is another Cambrian fossil assemblage with exceptional preservation found in Yunnan after the early Cambrian Chengjiang biota.More than 10 animal taxa have been reported from Guanshan,which have significantly improved our knowledge of the Cambrian explosion,of the origin and evolution of metazoan,and of the reconstruction of the early Cambrian ecosystem.The relatively rare eocrinoids that belong to the Echinodermata(Blastozoa)first appeared in the early Cambrian and became extinct in the Silurian.We hereby applied traditional as well as advanced imaging techniques(fluorescence microscope)to reveal morphological details of eocrinoid material recently collected from Guanshan,which in turn improves our understandings about the possible life habits of this animal.This study is important for understanding the biodiversity and early evolution of Echinodermata in the early Cambrian.
