ⓘ Insect anatomy ..

Anal cell

Anal cells are rear components of the insect wings, found for example in Diptera. A cell, in the case of an insect wing, is the central area surrounded by veins. It can be closed by veins or open.

Arista (insect anatomy)

In insect anatomy the arista is a simple or variously modified apical or subapical bristle, arising from the third antennal segment. It is the evolutionary remains of antennal segments, and may sometimes show signs of segmentation. These segments are called aristameres. The arista may be bare, sometime appearing no more than a simple bristle, pubescent - covered in short hairs, or plumose - covered in long hairs. The presence of an arista is a feature of the Diptera suborder Brachycera and may be especially well-developed in some species. It is known to contain thermo and hygroreceptors in ...


A bacteriome is a specialized organ, found mainly in some insects, that hosts endosymbiotic bacteria. Bacteriomes contain specialized cells, called bacteriocytes, that provide nutrients and shelter to the bacteria while protecting the host animal. In exchange, the bacteria provide essentials like vitamins and amino acids to the host insect. | Some insects, like the glassy-winged sharpshooter, host more than one species of bacteria. In armored scale insects, bacteriomes have unique genetic and sexual properties. For example, they have five copies of each chromosome - including two copies of ...

Biological screw joint

The biological screw joint is a naturally occurring form of the screw joint, a mechanical device that combines rotational movement with single-axis translation. Alexander Riedel of the State Museum of Natural History Karlsruhe and Thomas van de Kamp of the Karlsruhe Institute of Technology discovered it in specimens of Trigonopterus oblongus, a weevil found in Papua.

Blood gill

A blood gill is a gill like structure restricted to organs with spacious lumen and poorly developed/absent trachea, found in larvae of aquatic insects. Specific research questions the functionality of this gill to respiration, and concludes it exists more likely to absorb water.


Brochosomes are intricately structured microscopic granules secreted by leafhoppers and typically found on their body surface and, more rarely, eggs. Brochosomes were first described in 1952 with the aid of an electron microscope. Brochosomes are hydrophobic and help keep the insect cuticle dry. These particles have also been found in samples of air and can easily contaminate foreign objects, which explains erroneous reports of brochosomes on other insects.



In flies of the order Diptera, the prostigma is the anterior of the two pairs of spiracles opening on the pleura. The mesothoracic pair is located between the pro- and mesothorax and the metathoracic pair between the meso- and metathothorax. The following illustration shows the prostigma as number 13 on the right side of the image. The function of the prostigma is to provide an airway into the insects thorax to facilitate respiration.