Gaster (insect anatomy)
Videos
The gaster is the bulbous posterior portion of the metasoma found in hymenopterans of the suborder Apocrita. This begins with abdominal segment III on most ants, but some make a constricted postpetiol
Cataglyphis nigra with raised gaster
Petiole (insect anatomy)
Videos
In entomology, petiole is the narrow waist of some hymenopteran insects, especially ants, bees, and wasps in the suborder Apocrita. The petiole can consist of either one or two segments, a characteris
Gaster (insect anatomy)
…found in hymenopterans of the suborder Apocrita (bees, wasps and ants). This begins with abdominal segment III on most ants, but some make a constricted postpetiole out of segment III, in which case the gaster begins with abdominal segment IV. The gaster in ants contains what is sometimes called the "social stomach…
The sand wasp Ammophila sabulosa has an exceptionally long petiole.
This Acanthomyrmex ant has a petiole and postpetiole
A mymarommatid wasp with a visibly 2-segmented petiole