Glossary of "Evolution (4th ed.)" by Futuyma & Kirkpatrick (2017)
- A halting of the development of a morphological structure, resulting in a final adult phenotype that lacks the structure or bears an immature form of the structure. This can also refer to developmental arrest at the level of the entire organism resulting in an adult that resembles the juvenile form of an ancestral or related species (i.e., paedomorphosis).
- Futuyma, D. J. & Kirkpatrick, M. 2017. Evolution, 4th ed. -xviii + 602 pp. Sinauer Associates, Inc., Sunderland.