part of anterior abdominal segment dorsal transverse muscle A1-7 transverse muscle A1-7 dorsal transverse muscle 1 2022-07-05T13:30:44Z FBbt:00058451 muscle 18 muscle 18 - dorso-lateral external oblique No DT1 in thoracic segments, but one shown in A8 in Campos-Ortega and Hartenstein (1997). A1-7 pet5 The only dorsal transverse muscle of embryonic/larval abdominal segments 1-7. It is an external muscle (Landgraf et al., 2003; Zarin and Labrador, 2019). A1-7 DT1 fly_anatomy.ontology abdominal dorsal transverse muscle 1 A1-7 pleural external transverse 5 larval external muscle SN innervated muscle of A1-7