Metazoan body plan detectives at work: A review of The Great Fossil Enigma by Simon Knell The Great Fossil Enigma. The Search for the Conodont Animal, Simon J.Knell. 2013. Indiana University Press, Bloomington. 413 pp. ISBN 978‐0‐253‐00604‐2 (cloth). Issue 5 (20th September 2013) - Raff, Rudolf A.