part of lateral transverse muscle cell segment border muscle cell FBbt:00000483 We have adopted the nomenclature of Bate (1993) which names the muscles according to their position. There is no inference of serial homology between muscles of the same name of different thoracic and abdominal segments. Color-coded as internal in Zarin and Labrador (2019) - FBrf0245882, but grouped with LT (external) muscles in Zarin et al. (2019) - FBrf0244727. fly_anatomy.ontology Any muscle cell (FBbt:00005074) that is part of some segment border muscle (FBbt:00058316). SBM muscle cell muscle cell segment border muscle