November 21, 2023 Shaffer, Z., T. Sasaki, B. Haney, M.A. Janssen, S. Pratt, J. Fewell (2016). The foundress’ dilemma: Group selection for cooperation among queens of the harvester ant. Pogonomyrmex californicus, Scientific Reports 6, 29828 Home » Shaffer, Z., T. Sasaki, B. Haney, M.A. Janssen, S. Pratt, J. Fewell (2016). The foundress’ dilemma: Group selection for cooperation among queens of the harvester ant. Pogonomyrmex californicus, Scientific Reports 6, 29828