A study of the angular spread of plasma fluxes detected in the Venus ionosheath is presented. It is shown that in the inner regions of the ionosheath, where the flux intensity is severely decreased with respect to solar wind values, the width of the azimuthal distribution of the local plasma is comparable to, or even larger than, that of the stronger fluxes measured in the outer ionosheath. The observed variation of the angular width suggests the existence of a source of heating near the ionopause but is not consistent with the overall cooling that would be expectedd if mass loading and charge exchange collisions were solely responsible for the interaction process at that boundary. Dissipative phenomena associated with local plasma turbulent processes seem to be required to account for the broad angular distribution seen near the ionopause.