A Pennsylvanian 'supershark' from Texas Maisey, John G. ; Bronson, Allison W. ; Williams, Robert R. ; McKinzie, Mark Abstract Publication: Journal of Vertebrate Paleontology Pub Date: May 2017 DOI: 10.1080/02724634.2017.1325369 Bibcode: 2017JVPal..37E5369M