Drillholes are common in many different echinoderm classes, but have yet to be reported in homalozoans. A borehole in the Late Ordovician echinoderm Enoploura is the first evidence of drilling in Stylophora. The level of preservation and environmental setting suggest this drilling occurred while the organism was alive, thus supporting a predatory or parasitic interpretation.
 

Bradley Deline [delinebl@email.uc.edu], Department of Geology, University of Cincinnati, Cincinnati, Ohio 45221, USA.