Periodontal Ligament, Cementum, and Alveolar Bone in the Oldest Herbivorous Tetrapods, and Their Evolutionary Significance LeBlanc, Aaron R. H. ; Reisz, Robert R. Abstract Publication: PLoS ONE Pub Date: September 2013 DOI: 10.1371/journal.pone.0074697 Bibcode: 2013PLoSO...874697L