Definition of Pygidial. Meaning of Pygidial. Synonyms of Pygidial

- The pygidium (pl.: pygidia) is the posterior body part or shield of crustaceans and some other arthropods, such as insects and the extinct trilobites....
- chemicals as ants: formic acid. Bombardier beetles have well-developed pygidial glands that empty from the sides of the intersegment membranes between...
- their rectal chamber. Other insects such as the rove beetle Stenus emit pygidial gland surfactant secretions that reduce surface tension; this enables them...
- better defined pygidial axis and border. Heterocyclopyge also has a defined pygidial axis, a five-segmented thorax, and a defined pygidial border, but has...
- quaterspinosus is named after the fact that it has only four pairs of pygidial lappets. The headshield (or cephalon) may have a spine sticking forward...
- pygidial spines (23 versus 11, and in Gourdonia 13 spines) is most con****uous. Also, the pygidial border has a smooth connection with the pygidial spines...
- forest. They measure 11–12 mm (0.43–0.47 in) in length. An examination of pygidial gland chemical defenses found that the species does not produce significant...
- Pygidium subtriangular, about 1½× as wide as long. Pygidial axis with 8 discernible rings. 6 pairs of pygidial pleura terminate in well developed spines. →...
- that is inserted posteriorly to the lateral antennae; as well as long pygidial papillae. Juveniles of S. hirsuta are very similar to this species. Sphaerosyllis...
- as at the axis and pygidial spines are connected only with the posterior pleural bands. Further in all these genera the pygidial spines are longer than...