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Deinonychus antirrhopus Ostrom 1969 (coelurosaur)

Reptilia - Avetheropoda - Dromaeosauridae

Alternative combination: Velociraptor antirrhopus

Full reference: J. H. Ostrom. 1969. A new theropod dinosaur from the Lower Cretaceous of Montana. Postilla 128:1-17

Belongs to Deinonychus according to N. R. Longrich and P. J. Currie 2009

Sister taxa: none

Type specimen: YPM 5205. Its type locality is YPM 64-75, Edwards Ranch, which is in an Albian fluvial-lacustrine claystone in the Cloverly Formation of Montana.

Ecology: ground dwelling carnivore

Average measurements (in mm): femur length 336.0, femur diameter 316.0, femur circumference 119.0, fibula length 297.0, humerus length 248.2, humerus diameter 19.5, radius length 180.0, radius diameter 9.75, scapula length 190.0, skull 341.3 x 150.0, tibia length 348.3, tibia diameter 71.6, ulna length 194.3, ulna diameter 12.1

Estimated body mass: 91.8 kg based on femur length