Deletions of conserved motifs 2 and 3 from Dfd::ScrSM.UAS.Tag:HA.
Denticle types usually limited to the first thoracic segment (T1) in the embryo are seen in T2 and T3 as a result of Dfd::ScrΔ23.Scer\UAS.T:Ivir\HA1 expression under the control of Scer\GAL4arm.PS. Ectopic cirri are also observed in these segments.