CtBP87De-10/+ adult flies have one trichogen (hair) and one tormogen (socket) cell per notal microchaeta, similar to wild-type controls.
CtBP03463/CtBP87De-10 heterozygous pharates display extra dorsal thoracic mechanosensory bristles (additional bristles attached to sockets) and, less frequently, double bristles (two bristles housed in the same socket structure) and bald cuticle (complete loss of both bristles and their associated sockets). Only a subset of bristles are affected.
Within CtBP87De-10 dorsal thorax clones, extra bristles, double bristles forming from the same socket, bald cuticle, and sockets lacking bristles are observed. All but the presutural bristle appear to be affected. The double bristle phenotypes appear exclusively at the anterior scutellar bristle and posterior dorsocentral bristle positions. Bald cuticle appears in all regions except the posterior postalar bristle and presutural regions. Socket without bristle phenotype is observed for all positions except the presutural position.
A putative cell polarity abnormality of the microchaetes is observed in CtBP87De-10 dorsal thorax clones.
CtBP87De-10 mutant cyst progenitor cell clones cannot be recovered.
Heterozygotes occasionally have bristle with a double-socket phenotype. CtBP03463/CtBP87De-10 pharate adults show bristle shaft defects and shaft loss.