abdominal 1 dorsal longitudinal muscle abdominal 1 lateral dorsal longitudinal muscle 99 2022-07-05T13:30:44Z FBbt:00058969 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 posteriorly to the second abdominal tergite. It is composed of several fibers. fly_anatomy.ontology