part of lateral transverse muscle cell muscle cell lateral transverse muscle 1 muscle cell of lateral transverse muscle 1 2013-01-18T11:46:42Z fly_anatomy.ontology LT1 muscle cell FBbt:00110262 Any muscle cell (FBbt:00005074) that is part of some lateral transverse muscle 1 (FBbt:00059143). Following Bate (1993), larval hypodermal muscles are named for their orientation and numbered based on their order from dorsal to ventral or anterior to posterior. So, except where musculature is essentially identical between segments (as for A1-7, with a couple of exceptions for A1), serial homology should not be assumed on the basis of a shared name.