  The Cold Dark Matter (CDM) theory predicts a wealth of substructure within
dark halos. These predictions match observations of galaxy clusters like the
nearby Virgo cluster. However, CDM has a "small scale crisis" since galaxies
dominate the halo with little substructure while the model predicts that
galaxies should be scaled versions of galaxy clusters with abundant
substructure. Compared to CDM predictions, the Milky Way and Andromeda are
"missing" objects with velocity dispersions $\sigma \geq 10$ km s$^{-1}$. The
energy scale of these missing satellites is low enough that stellar winds and
supernovae might remove gas and suppress the formation of their luminous
stellar components. Here, we show that the small scale crisis persists in
fossil groups that have masses of up to 40% of the nearby Virgo cluster of
galaxies. Fossil groups are missing satellites with luminosities that occur at
the predicted frequency in the Virgo cluster. Moreover, the "missing galaxies"
in fossil groups are nearly as luminous as the Milky Way with a velocity
dispersion $\sigma \leq$ 150 km s$^{-1}$.
