  The analysis of the experimental data of Crystal Barrel Collaboration on the
p anti-p annihilation in flight with the production of mesons in the final
state resulted in a discovery of a large number of mesons over the region
1900-2400 MeV, thus allowing us to systematize quark-antiquark states in the
(n,M^2) and (J,M^2) planes, where n and J are radial quantum number and spin of
the meson with the mass M. The data point to meson trajectories in these planes
being approximately linear, with a universal slope. Basing on these data and
results of the recent K-matrix analysis a nonet classification is performed. In
the scalar-isoscalar sector, the broad resonance state f0(1200-1600) is
superfluous for the q anti-q classification, i.e. it is an exotic state. The
ratios of coupling constants for the transitions f0-> pi pi, K anti-K, eta eta,
eta eta' point to the gluonium nature of the broad state f0(1200-1600). The
problem of the location of the lightest pseudoscalar glueball is also
discussed.
