part of develops into prothoracic leg disc trichoid sensillum of cervical membrane of prothoracic leg prothoracic episternum prothoracic epimeron prothoracic sternum anlage proximal joint of prothoracic coxa presumptive prothoracic structures from prothoracic leg disc 2014-02-21T10:41:27Z Th1 fly_anatomy.ontology Region of the prothoracic leg disc that will develop into the prothoracic episternum, sternum, epimeron, the trichoid sensillum of cervical membrane of prothoracic leg, the ball of the proximal joint of prothoracic coxa. FBbt:00110726