  Non-Maxwellian metaequilibria can exist in low-collisionality plasmas as
evidenced by satellite and laboratory measurements. By including the full
pressure tensor dynamics in a fluid plasma model, we show that a sheared
velocity field can provide an effective mechanism that makes an initial
isotropic state anisotropic and agyrotropic. We discuss how the propagation of
magneto-elastic waves can affect the pressure tensor anisotropization and its
spatial filamentation which are due to the action of both the magnetic field
and flow strain tensor. We support this analysis by a numerical integration of
the nonlinear equations describing the pressure tensor evolution.
