This whole section, including the title, is mostly swiped from Mike’s Tutorial 17. Other posts in this series are here. Papers referenced in these slides: Farke, Andrew A., and Sertich, Joseph J.W. 2013. An abelisauroid theropod dinosaur from the Turonian of Madagascar. PLoS ONE 8(4): e62047. doi:10.1371/journal.pone.0062047 [PDF] Taylor, Michael P., Mathew J. Wedel and Richard L. Cifelli. 2011.