Shelled Arthropod from Chengjiang
with Preserved Appendages
Time: Early Cambrian (~525 million years ago)
Site: Chengjiang Maotianshan Shales - Quiongzhusi Section, Yu’anshan
Member, Heilinpu Formation, Ercaicun Village, Haikou, Kunming, Yunnan
unusual arthropod, Ercaicunia multinodosa is mostly known from the
thin-shelled carapace. This exceptionally well preserved specimen
shows a segmented abdomen, and
at the posterior of the carapace, several legs are evident. The
systematic position of this taxon has undergone several revisions.
It was established as the sole member of the Family Clypercarididae,
and was originally known from only one specimen. Those from Chengjiang
have been called Ercaicunia multinodosa, but some scientists believe
that to be a junior synonym of Clypecaris. It differs from the more
common genus Waptia in having more body segments.
fossil pictures to enlarge