part of develops from pseudotrachea pseudotracheal row fly_anatomy.ontology Open channel that extends from the dorsal medial region of the labellum, pointing slightly around the outside of each half of the labellum. The pseudotrachea is kept open by narrow, somewhat variably shaped, transverse, sclerotised bands, the ends of which are free from the derm. There are 6 of these per palpus, conducting food to the tip of the labrum. FBbt:00004532 pseudotracheal ridge FBbt:00004164 labellum anatomical space presumptive pseudotrachea