Notes:  The pectoral girdle is of dual origin consisting of mostly dermal and partially endochondral bones.  The cleithrum makes up the largest part of the girdle and is also the location of the scapulocoracoid.  The cleithrum joins the clavicle which has a medial bend to meet the opposite clavicle, where they form a symphysis.  The cleithrum dorsally supports the supracleithrum, which in turn supports the posttemporal through which the dermal girdle is attached to the back of the skull.  The postcleithrum is a dermal element that joins the girdle together and eventually is lost in teleosts.  The pectoral girdle becomes detached from the skull in tetrapods over time.