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By: Zangerl, Rainer, - Hansen, Michael C. - Winter, H. Frank.Edition:Publication info: [Chicago, Ill.], Field Museum of Natural History, 1993Volume: n.s. no.26 (1993)Series:Holding Institution: University Library, University of Illinois Urbana ChampaignSubjects: Anatomy Condrichthyes, Fossil Morphology Petalodontida TeethBHL Collections: