abdominal 1 dorsal longitudinal muscle abdominal 1 lateral dorsal longitudinal muscle 100 2022-07-05T13:30:44Z FBbt:00058970 fly_anatomy.ontology Dorsal longitudinal muscle of abdominal segment 1 found in the lateral region of the segment. It tapers anteriorly to attach to the anterior border of the first abdominal tergite and attaches laterally to this same tergite. It is composed of several fibers.