A Tm1FBtr0091350:pb-XREcollacZ reporter construct containing the promoter region of Tm1 from -1400bp to base pair 72 of the second exon but deleted for an intron fragment from +167bp to +1367bp, and preceded by an intron fragment from +167 to +621bp, drives expression of EcollacZ in muscles of embryo, larvae, and adults.