organism
 |__pupa_____________
organ system         |
 |__tracheal system__|
                     pupal tracheal system  177 rec.
                      |__air bubble 26 rec.
                      |__coiled tracheole 6 rec.
                      |__pupal spiracle 100 rec.
                      |   |__anterior pupal spiracle 84 rec.
                      |   |__non-functional pupal spiracle(+)
                      |__pupal tracheal section 68 rec.
                          |__pupal abdominal tracheal branch 15 rec.
                          |__pupal cerebral tracheal anastomosis
                          |__pupal cerebral tracheal branch
                          |__pupal cerebropharyngeal tracheal branch(+)
                          |__pupal dorsal tracheal branch(+)
                          |__pupal ganglionic tracheal branch(+)
                          |__pupal haltere tracheal branch
                          |__pupal leg tracheal branch(+) 1 rec.
                          |__pupal pharyngeal tracheal branch
                          |__pupal spiracular tracheal branch(+)
                          |__pupal tracheal dorsal trunk(+) 9 rec.
                          |__pupal tracheal lateral trunk(+) 3 rec.
                          |__pupal tracheal transverse connective(+) 1 rec.
                          |__pupal ventral tracheal anastomosis(+)
                          |__pupal ventral tracheal branch(+)
                          |__pupal wing tracheal branch
                          |__secondary tracheal branch(+) 43 rec.