This image was acquired from
wikimedia. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Keywords from Image Description:
Carnarvonia venosa USNM PAL . width colspan valign bottom align center PAGEtextstyle left frac right Middle Cambrian Burgess shale member of the Stephen formation about feet above the phyllopod bed near the base of the shale on the west slope of the ridge between Mount Field and Wapta Peak one mile km northeast of Burgess