Cranial Anatomy of the Earliest Marsupials and the Origin of Opossums Horovitz, Inés ; Martin, Thomas ; Bloch, Jonathan ; Ladevèze, Sandrine ; Kurz, Cornelia ; Sánchez-Villagra, Marcelo R. Abstract Publication: PLoS ONE Pub Date: December 2009 DOI: 10.1371/journal.pone.0008278 Bibcode: 2009PLoSO...4.8278H