Archimetabolism

Archimetabolism (from the Greek. Ἀρχι - senior and metabole-transformations) is a type of metamorphosis of insects inherent in mayflies and bristles . It arose on the basis of protometabolism after the transition of larval developmental stages from an amphibiotic existence to an aquatic image.

Such stages are inherent in it: egg → prelarva → larva → mollusk → subimago → imago .

The prelarvae have homogeneous segmentation , underdeveloped antennas and tail filaments, and simple eyes. After molting, it turns into a larva, with formed antennas, tail filaments, faceted eyes , and rudiments of tracheal gills. After 5-6 molts, the rudiments of the wings appear and the larva turns into mollusk. During this stage, the oral apparatus is reduced, the intestine is filled with air and turns into an aerostatic apparatus, wings and reproductive system intensively develop. This stage is characterized by the presence of developed wings and differs from adults only in the underdeveloped reproductive system. After molting, the subimago turns into an imago , which has fully developed and functioning reproductive organs and structures associated with it.