The Oldest Caseid Synapsid from the Late Pennsylvanian of Kansas, and the Evolution of Herbivory in Terrestrial Vertebrates Reisz, Robert R. ; Fröbisch, Jörg Abstract Publication: PLoS ONE Pub Date: April 2014 DOI: 10.1371/journal.pone.0094518 Bibcode: 2014PLoSO...994518R