A vanished history of skeletonization in Cambrian comb jellies Ou, Q. ; Xiao, S. ; Han, J. ; Sun, G. ; Zhang, F. ; Zhang, Z. ; Shu, D. Abstract Publication: Science Advances Pub Date: July 2015 DOI: 10.1126/sciadv.1500092 Bibcode: 2015SciA....1E0092O