part of imaginal disc peripodial epithelium A squamous epithelium that makes up one side of the epithelial sac of which each imaginal disc consists, with the other side being the columnar epithelium that will form the main adult structure generated by the disc (Gibson et al., 2000). The anterior-posterior compartment boundary of each disc runs through the middle of this epithelium. During the third larval instar stage, some of the cells in this epithelium send out long processes, known as lumenal extensions, which traverse the disc lumen to contact the columnar cells of the disc (Gibson et al., 2000). During metamorphosis, peripodial epithelia tend to give rise to parts of the body wall integument (Milner et al., 1984; Gibson et al., 2000). squamous peripodial membrane fly_anatomy.ontology FBbt:00001762 peripodial membrane squamous epithelium