Terrestrial Origin of Viviparity in Mesozoic Marine Reptiles Indicated by Early Triassic Embryonic Fossils Motani, Ryosuke ; Jiang, Da-yong ; Tintori, Andrea ; Rieppel, Olivier ; Chen, Guan-bao Abstract Publication: PLoS ONE Pub Date: February 2014 DOI: 10.1371/journal.pone.0088640 Bibcode: 2014PLoSO...988640M