Deinocheiridae

Deinocheirids Temporal range: Early to Late Cretaceous, 115–69 Ma PreЄ Є O S D C P T J K Pg N
Holotype arms of Deinocheirus
Scientific classification
Kingdom:	Animalia
Phylum:	Chordata
Class:	Reptilia
Clade:	Dinosauria
Order:	Saurischia
Suborder:	Theropoda
Clade:	†Ornithomimosauria
Family:	†Deinocheiridae Osmólska & Roniewicz, 1970
Type species
Deinocheirus mirificus Osmólska & Roniewicz, 1970
Genera
†Beishanlong †Garudimimus †Deinocheirus
Synonyms
Garudimimidae Barsbold, 1981

Deinocheiridae is a family of ornithomimosaurian dinosaurs, living in Asia from the Albian until the Maastrichtian. The family was originally named by Halszka Osmólska and Roniewicz in 1970, including only the type genus Deinocheirus. In a 2014 study by Yuong-Nam Lee and colleagues and published in the journal Nature, it was found that Deinocheiridae was a valid family. Lee et al. found that based on a new phylogenetic analysis including the recently discovered complete skeletons of Deinocheirus, the type genus, as well as Garudimimus and Beishanlong, could be placed as a successive group, with Beishanlong as the most primitive and Deinocheirus as most derived. The family Garudimimidae, named in 1981 by Rinchen Barsbold, is now a junior synonym of Deinocheiridae as the latter family includes the type genus of the former. The group existed from 115 to 69 million years ago, with Beishanlong living from 115 to 100 mya, Garudimimus living from 100 to 83 mya, and Deinocheirus living from 71 to 69 mya.

When originally named, Halszka Osmólska and Ewa Roniewicz, found that Deinocheirus was a carnosaurian, and because of its extremely unique arms, named the monotypic family Deinocheiridae for it. Osmólska and Roniewicz found that Deinocheiridae could be placed within the superfamily Megalosauroidea, within the infraorder Carnosauria (Carnosauria at the time was a paraphyletic group of all large theropods). Previously, the only carnosaurian from that time and place in Asia was the tyrannosaurid Tarbosaurus.