somatic muscle of metathorax metathoracic lateral intersegmental muscle 80 2022-07-05T13:30:44Z Lateral intersegmental muscle of the adult metathorax that extends anterioposteriorly. It attaches anteriorly to the metafurca and posteriorly to the posterior margin of the pleural membrane of the first abdominal segment. FBbt:00058943 fly_anatomy.ontology