in D. patagonica are more likely to be those of terrestrial adaptations than those of aquatic adaptations based on not only morphological characteristics, but plesiomorphic and apomorphic shared characteristics to that of current living snake species. References Further reading Fossils (Smithsonian Handbooks) by David Ward Dinosaurus: The Complete Guide to Dinosaurs by Steve Parker. Pg. 99 Fossil Snakes of North America: Origin, Evolution, Distribution, Paleoecology (Life of the Past) by J. Alan Holman Cretaceous snakes Late Cretaceous animals of South America Bajo de la Carpa Formation Fossil taxa described in 1901 Taxa named by Arthur Smith Woodward