Hemimetabolism

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Related to hemimetabolous: holometabolous, hemimetabolous metamorphosis
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

Hemimetabolism

 

incomplete metamorphosis, a type of postembryonic development in insects of several systematic groups (such as dragonflies, mayflies, stone flies, Orthoptera, and Hemiptera). From the eggs come larvae (nymphs), which outwardly are similar to mature insects in that they have faceted eyes and a jointed tarsus, as well as mouth organs just as an adult does. Various orders of insects in the post-embryonic stage have from three to 30 nymph stages. Metamorphosis of the nymph into an adult insect takes place without the chrysalis stage. Sometimes the term “hemimetabolism” is used only for the development of the dragonfly, mayfly, and stone fly, which in the nymph stage have provisional or temporary organs (branchiae, masks); the development of other insects with incomplete metamorphosis, in which the larvae lack provisional organs, is called “paurometabolism.” The opposite of hemimetabolism is holometabolism.

M. S. GILIAROV

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.
References in periodicals archive ?
gregaria, it being a hemimetabolous insect, the cyclical change of serum HA, where the apolysis-ecdysis phase is short and restricted to the formation of new cuticle, cannot be explained on the basis proposed by Komano et al.
For hemimetabolous insects, this ratio is about 1.3 (Cole 1980).
Growth ratios in holometabolous and hemimetabolous insects.
To avoid such ambiguities, an ideal study system should have a fixed number of discrete developmental stages, a condition that is met by many hemimetabolous insects.
In this discussion, I attempt to synthesize the results of these analyses, linking them to the knowledge on growth processes in hemimetabolous insects and to the evolutionary patterns found in a comparison of ontogenies among all six species of the genus Limnoporus (Klingenberg and Spence 1993).
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vernale suggests that responses to small shifts in temperature are not universal and may be more prevalent within particular phylogenetic groups (e.g., hemimetabolous insects).
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It will be important to establish whether similar thermal responses in adult body size and cell size occur in other insects, particularly hemimetabolous species, and other ectotherms.