PECULIARITIES OF THE STRUCTURE AND FINE STRUCTURE OF THE BRAIN OF THE SMALLEST INSECTS AS A RESULT OF MINIATURIZATION. IV. THRIPS (THYSANOPTERA, THRIPIDAE)

摘要

In this final article of the series, the structure and fine structure of the brain of the greenhouse thrips, Heliothrips haemorrhoidalis (Thripidae), are described. They were studied through a series of histological sections using both three-dimensional computer-based reconstructions and transmission electron microscopy. Structural peculiarities of the brain organization and its features associated with body miniaturization, as well as its quantitative characteristics (the number of cells and the volume of zones) were highlighted for the first time both in the imago and first instar nymph of Heliothrips haemorrhoidalis. Distinctions were suggested of the miniaturization limits of the nervous system for holo- and hemimetabolous insects.