High Diversity, Low Disparity and Small Body Size in Plesiosaurs (Reptilia, Sauropterygia) from the Triassic-Jurassic Boundary Benson, Roger B. J. ; Evans, Mark ; Druckenmiller, Patrick S. Abstract Publication: PLoS ONE Pub Date: March 2012 DOI: 10.1371/journal.pone.0031838 Bibcode: 2012PLoSO...731838B