Amnh. «Arthropod Morphology : Metamorphosis» (en anglès). American Musmeum of Natural History, (). [Consulta: 17 febrer 2015]. «Pupa: When insects undergo complete metamorphosis, this is the form in between the last larval instar and the adult. In this stage, the insect does not usually feed or move around much. It may be covered by a protective cocoon.»
