In March 2020, a new meat-eating dinosaur with a feathered body, iron grip and a tail for agile pursuit of prey, was discovered by fossil hunters, revealing that raptor dinosaurs were thriving right up to the point the asteroid struck, 66m years ago. The Dineobellator notohesperus is a new species added to the velociraptor group. What did scientists likely rely on to group this new dinosaur with velociraptors?