mechanosensory sensory organ__
internal sense organ__________|
                              chordotonal organ
                               |__monoscolopidial chordotonal organ  38 rec.
                                   |__abdominal lateral monoscolopidial chordotonal organ lch1 14 rec.
                                   |   |__abdominal 1 lateral monoscolopidial chordotonal organ lch1 7 rec.
                                   |   |__abdominal 2 lateral monoscolopidial chordotonal organ lch1 5 rec.
                                   |   |__abdominal 3 lateral monoscolopidial chordotonal organ lch1 7 rec.
                                   |   |__abdominal 4 lateral monoscolopidial chordotonal organ lch1 5 rec.
                                   |   |__abdominal 5 lateral monoscolopidial chordotonal organ lch1 5 rec.
                                   |   |__abdominal 6 lateral monoscolopidial chordotonal organ lch1 5 rec.
                                   |   |__abdominal 7 lateral monoscolopidial chordotonal organ lch1 5 rec.
                                   |__abdominal ventral monoscolopidial chordotonal organ vch1 18 rec.
                                   |   |__abdominal 1 ventral monoscolopidial chordotonal organ vch1 12 rec.
                                   |   |__abdominal 2 ventral monoscolopidial chordotonal organ vch1 10 rec.
                                   |   |__abdominal 3 ventral monoscolopidial chordotonal organ vch1 10 rec.
                                   |   |__abdominal 4 ventral monoscolopidial chordotonal organ vch1 10 rec.
                                   |   |__abdominal 5 ventral monoscolopidial chordotonal organ vch1 10 rec.
                                   |   |__abdominal 6 ventral monoscolopidial chordotonal organ vch1 10 rec.
                                   |   |__abdominal 7 ventral monoscolopidial chordotonal organ vch1 10 rec.
                                   |__abdominal ventral monoscolopidial chordotonal organ vch2 4 rec.
                                   |   |__abdominal 1 ventral monoscolopidial chordotonal organ vch2
                                   |   |__abdominal 2 ventral monoscolopidial chordotonal organ vch2
                                   |   |__abdominal 3 ventral monoscolopidial chordotonal organ vch2
                                   |   |__abdominal 4 ventral monoscolopidial chordotonal organ vch2
                                   |   |__abdominal 5 ventral monoscolopidial chordotonal organ vch2
                                   |   |__abdominal 6 ventral monoscolopidial chordotonal organ vch2
                                   |   |__abdominal 7 ventral monoscolopidial chordotonal organ vch2
                                   |__mesothoracic ventral monoscolopidial chordotonal organ vch1 2 rec.
                                   |__metathoracic ventral monoscolopidial chordotonal organ vch1
                                   |__pharyngeal monoscolopidial chordotonal organ 5 rec.
                                   |__prothoracic ventral monoscolopidial chordotonal organ vch1