Your chart itself is surely original research I d hope that no serious paleontologist would be either sloppy or ignorant enough to put Yixianosaurus which lived 125 million years ago near the base of the tree and then the Dromaeosarinae in question at the very end of one branch when one of their representatives Utahraptor lived get this 125 million years ago It was contemporaneous with Yixianosaurus which on your chart is THE first genetically example of fossil feather impressions Which means that Utahraptor which was TWENTY FEET LONG and probably lacking in feathers was almost certainly divergent from your first feathered example Then again the entire tree seems misarranged Why is archeopteryx listed as being descended from creatures which lived millions of years after it It may have been around as many as 150 million years ago and some of its ancestors are more recent than that