mesothoracic segment
 |__adult mesothoracic segment_________________
adult                                          |
 |__segmental subdivision of adult integument__|
adult thorax                                   |
 |__adult external thorax______________________|
adult thoracic segment                         |
 |__adult mesothoracic segment_________________|
adult integumentary system                     |
 |__adult external thorax______________________|
segmental subdivision of integument            |
 |__segmental subdivision of adult integument__|
tagmatic subdivision of integument             |
 |__adult external thorax______________________|
                                               adult external mesothorax  5176 rec.
                                                |__dorsal mesothorax 5068 rec.
                                                |   |__mesothoracic tergum(+) 5059 rec.
                                                |__ventral mesothorax 215 rec.
                                                    |__adult anterior thoracic spiracle 8 rec.
                                                    |__mesofurca 9 rec.
                                                    |__mesothoracic articulation(+) 1 rec.
                                                    |__mesothoracic cleft(+) 23 rec.
                                                    |__mesothoracic coxal bridge(+) 1 rec.
                                                    |__mesothoracic foramen(+) 1 rec.
                                                    |__mesothoracic phragma 11 rec.
                                                    |__mesothoracic pleurum(+) 169 rec.
                                                    |__pleural suture 5 rec.
                                                    |__pleural wing process 14 rec.