Adaptive Radiation in Socially Advanced Stem-Group Ants from the Cretaceous Author Phillip Barden Author David A. Grimaldi text Current Biology 2016 26 515 521 journal article http://dx.doi.org/10.1016/j.cub.2015.12.060 4f330383-51a0-4406-bec4-9a9fc6d33f8d 269536 7F08DE99-7838-40CB-BD40-8123E8C5AC94 Gerontoformica orientalis (Engel and Grimaldi) 2005 : 5 . New Combination .