Associated with the 2PXD element.
macrochaeta & abdominal tergite
microchaeta & pleural membrane
Nearly all abdominal segments have on the pleurae two rows of bristles, which are the same size as those on the sternites. Mutant-bearing flies have a row of bristles arising immediately posterior to each pigment band that are shorter than other tergite bristles.
Cline.