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Hi, There is not direct evidence that some dinos have given live birth as far as I know. Last week a publication referred to this matter shortly but not much: "The aim of this study is to statistically evaluate the variability of a Megaloolithidae eggshell sample at Suterranya, and to reassess the utility of oospecies as diversity indicators for dinosaurs laying eggs in a particular environment. By the bracket of extant dinosaurs and crocodilians, we can infer oviparity in extinct dinosaurian clades; thus osteology would be a good diversity index for ‘egg laying dinosaurs’ because most or all probably laid eggs. The mystery is why lepidosaurians have evolved ovovivipary and vivipary so often, while archosaurs seem to be terrible at it." The whole publication could be dowload from: http://www.palarch.nl/Palaeontology/palaeontology.htm To all Paleonetters, Many years ago, I heard somewhere that, despite egg-laying being well known in several clades of dinosaurs (e.g., ceratopsians), some dinosaurs were hypothesized to have given live birth. I heard this applied to sauropods. Sauropod embryos inside eggs have since been reported from South America. What is the current status of the idea of live birth in some dinosaur groups? Best, James St. John stjohn.2@osu.edu _______________________________________________ James St. John Founders Hall 156A 1179 University Drive Ohio State University at Newark Newark, Ohio 43055 USA __________________________________________________
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