a New Metazoan from the Middle Cambrian of Utah and the Nature of the Vetulicolia Briggs, Derek E. G. ; Lieberman, Bruce S. ; Halgedahl, Susan L. ; Jarrard, Richard D. Abstract Publication: Palaeontology Pub Date: July 2005 DOI: 10.1111/j.1475-4983.2005.00489.x Bibcode: 2005Palgy..48..681B