images

Pirania

by

Walter B. Myers/Novapix

Reference

t-glb99-00042

Date

2011-11-20

A species of Pirania, a primitive sponge that populated the ocean floors about 505 million years ago. The stems were hollow with bunches of long spicules attached to them.
Based upon a sketch reconstruction by J.K. Rigby from the book, The Burgess Shale by Harry B. Whittington.