University of Florida researcher Alex Hastings displays a pelvic bone of Acherontisuchus guajiraensis, a 60-million-year-old ancestor of crocodiles discovered at the same site in northeastern Colombia as Titanoboa, the world’s largest snake. Other fossils pictured include portions of the lower and upper jaw, as well as teeth, a rib and toe. The new species is described in a study published Sept. 15 in Palaeontology. Photo taken Sept. 1, 2011.