Compsognathidae

Ornitholestes

Tyrannosauroidea

Pelecanimimus

Eumaniraptora

Alvarezsauridae

Carnosauria

Avetheropoda

COELUROSAURIA

Maniraptora

Paraves

Tyrannoraptora

Maniraptoriformes

Therizinosauroidea

Oviraptorosauria

Eotyrannus

Tyrannosauridae

Ornithomimidae

COELUROSAURIA

Ornithomimosauria

Dilong

Enlarged brain; Long narrow hand; “Boat”-shaped chevrons; Long narrow foot; Protofeathers

Fused nasals; U-shaped premaxillary teeth Enlarged foreliimb; Laterally-directed

shoulder joint; Large bony sternum; Well-developed semilunate carpal; True feathers; ?Backwards-pointing pubis

T-shaped lacri-mal; Distal chev-rons split; L-shaped scapulo-coracoid

Small skulls; Elongated necks; Enlarged manual claws

Small but powerful arm; Enlarged manual digit I; Reduced manual digits II and III; Arctometatarsus in advanced forms

Toothless beak; Arctometatarsus

Larger size; Elongate hindlimbs

MUCH larger size; Enlarged head; Thick-ened teeth; Reduced arms; Manual digit III lost; Arctometatarsus Leaf-shaped

teeth

Small skull; Long neck;

Metacarpals all the same

length

Short boxy skulls; Some toothless;

Some with arcto-metatarsus