  The small difference between the rhombohedral phosphorus lattice ($A$-7
phase) and the simple cubic phase as well as between phosphorene and the cubic
structure is used in order to construct their quasiparticle band dispersion. We
exploit the Peierls idea of the Brillouin zone doubling, which has been
previously employed in consideration of semimetals of the $V$ period and
$IV$--$VI$ semiconductors.
  In the common framework, individual properties of phosphorus allotropes are
revealed.
