Puparium vs. Pupa — What's the Difference?

(entomology) An enclosing case of a pupa that is formed from the exoskeleton of an insect's final stage before pupation.

A pupa (Latin: pupa, "doll"; plural: pupae) is the life stage of some insects undergoing transformation between immature and mature stages. Insects that go through a pupal stage are holometabolous: they go through four distinct stages in their life cycle, the stages thereof being egg, larva, pupa, and imago.

An insect in the nonfeeding stage between the larva and adult, during which it typically undergoes complete transformation within a protective cocoon or hardened case. Only insects that undergo complete metamorphosis have pupal stages.

An insect in the development stage between larva and adult.

Any insect in that stage of its metamorphosis which usually immediately precedes the adult, or imago, stage.

A genus of air-breathing land snails having an elongated spiral shell.

An insect in the inactive stage of development (when it is not feeding) intermediate between larva and adult