Instar
Instar
Instar (/ˈɪnstɑːr/; from the Latin instare, "to stand upon or near") is a term used in Entomology to denote the developmental stages of Arthropods, including insects, between each Molt.
Etymology
The term "instar" originates from the Latin word instare, meaning "to stand upon or near". This term was first used in this context by Jean-Henri Fabre in the late 19th century.
Definition
An instar is a stage between two periods of moulting in the development of an arthropod, such as an insect or a crustacean. Each instar is a progression towards the adult form, and the creature must shed its Exoskeleton to transition to the next stage.
Related Terms
- Larva: The immature, wingless, and often wormlike feeding form that hatches from the egg of many insects.
- Pupa: The life stage of some insects undergoing transformation between immature and mature stages.
- Nymph: The immature form of some insects, which do not change greatly as they grow, unlike insects that undergo a complete metamorphosis.
- Metamorphosis: A process by which an animal physically develops after birth or hatching, involving a conspicuous and relatively abrupt change in the animal's body structure through cell growth and differentiation.
See Also
External links
- Medical encyclopedia article on Instar
- Wikipedia's article - Instar
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