Okita, I., M. Terayama, and K. Tsuchida. “Cryptic Lineages in the Cardiocondyla Sl. Kagutsuchi Terayama (Hymenoptera: Formicidae) Discovered by Phylogenetic and Morphological Approaches”. Sociobiology, vol. 62, no. 3, Sept. 2015, pp. 401-1, doi:10.13102/sociobiology.v62i3.805.