Glossary of "Evolution (4th ed.)" by Futuyma & Kirkpatrick (2017)
- Animal societies characterized by overlapping generations, cooperative care of offspring (including those of other individuals), and a division of labor between reproductive and non-reproductive groups of adults.
- Futuyma, D. J. & Kirkpatrick, M. 2017. Evolution, 4th ed. -xviii + 602 pp. Sinauer Associates, Inc., Sunderland.