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A larva (/ ˈ l ɑːr v ə /; pl.: larvae / ˈ l ɑːr v iː /) is a distinct juvenile form many animals undergo before metamorphosis into their next life stage. Animals with indirect development such as insects , some arachnids , amphibians , or cnidarians typically have a larval phase of their life cycle .
Withdrawal of the juvenile hormone is the immediate cause of metamorphosis, in conjunction with the brain hormone and ecdysone, which are responsible for the shedding of the larval cuticle and for the production of the new cuticle embodying the features of the imago.
- Boris Ivan Balinsky
Aug 10, 2012 · Likewise, both pro-nymphs and larvae have high levels of juvenile hormone, which is known to suppress the development of adult features. In insects that undergo incomplete...
- Ferris Jabr
Sep 2, 2024 · Larva, stage in the development of many animals, occurring after birth or hatching and before the adult form is reached. These immature, active forms are structurally different from the adults and are adapted to a different environment.
- The Editors of Encyclopaedia Britannica
Nov 9, 2023 · Metamorphosis is a fascinating biological phenomenon that involves a considerable change in an animal’s body structure and physiology as it matures from juvenile to adulthood. This sophisticated process has three main stages: egg, larva, and adult.
Sep 21, 2019 · The larval forms usually change in shape during their development and progressive stages are not similar in insects. This change in form is known as metamorphosis. These changes are controlled by a juvenile hormone which is secreted by glands-corpora allata present in the posterior region of insect’s head.
The juvenile form that hatches from the egg is called a larva. The larva (caterpillar, grub, maggot) undergoes a series of molts as it becomes larger. The stages between these larval molts are called instars. The number of molts before becoming an adult is characteristic for the species, although environmental factors can increase or decrease ...
