part of develops from wing hinge axillary cord alula fly_anatomy.ontology Ferris (1950) - FBrf0007734 notes that 'alula' may refer to either a proximal lobe of the posterior wing (='alar lobe') or the membranous area between this lobe and the body, which is referred to as 'axillary cord' in Bryant (1975). FBbt:00004744 A thickened, corrugated region of the posterior margin of the wing hinge. It has a crenellated appearance and harbors a single row of short, fine hairs (Bryant, 1975). presumptive axillary cord section of wing margin