Evolution of a Novel Muscle Design in Sea Urchins (Echinodermata: Echinoidea) Ziegler, Alexander ; Schröder, Leif ; Ogurreck, Malte ; Faber, Cornelius ; Stach, Thomas Abstract Publication: PLoS ONE Pub Date: May 2012 DOI: 10.1371/journal.pone.0037520 Bibcode: 2012PLoSO...737520Z