  Between 2004 until today many new resonances in the QCD spectrum have been
added by the Particle Data Group. However, it is still possible that there are
further states that have yet to be measured, as predicted by Lattice QCD
calculations and Quark Models. In this paper I review how these missing states
would influence the field of heavy-ion collisions. Additionally, the quantum
numbers that characterize these missing states are also discussed.
