part of develops from develops into developing embryonic structure late extended germ band embryo anlage ventral epidermis primordium ventral apodeme anlage FBbt:00016009 fly_anatomy.ontology Anlage of the ventral apodeme of the late extended germ band embryo that will give rise to the ventral apodeme primordium. A venApo ventral apodeme primordium ventral ectoderm derivative