Bullatosauria is an abandoned redundant clade, created in 1994 by paleontologist Thomas Holtz, to unite Ornithomimosauria with Troodontidae. Holtz in 1994 thought both groups were sister clades, but rejected this hypothesis in 1999. Most paleontologists now consider troodontids to be much more closely related to either birds or Dromaeosauridae than they are to ornithomimosaurs, causing the clade Bullatosauria to be abandoned.