+--------------Dr B8b              
                      !
                 +175.4         +----Tn B8a              
                 !    !    +638.4
                 !    +271.5    +----Tr B8a              
            +272.1         !
            !    !         +---------M B8x        B8b ?         
            !    !
       +346.9    +-------------------fox-36               
       !    !
       !    !    +-------------------Dr C8a       C8a             
       !    !    !                                *
       !    +332.1    +--------------M C8A        *       
       !         !    !                           *
  +1000.0         +918.8         +----Tr C8a      *        
  !    !              !    +755.2                 *
  !    !              +608.6    +----Tn C8a       *       
  !    !                   !                      *
  !    !                   +---------fox-72       *       
  !    !
  !    +-----------------------------MF-8-2       B8a ?       
  !
  +----------------------------------Dr B8a