HONEYBEE. “An excellent example of gene–environment coevolution is the honeybee, in which the origin of its eusociality probably lay in the high degree of relatedness fostered by haplodiploidy, but which persists in modern species despite the fact that relatedness in the hive is generally quite low, due to multiple queen matings, multiple queens, queen deaths and the like.”
http://rstb.royalsocietypublishing.org/content/366/1566/878