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1 October 2015 The First Giant Raptor (Theropoda: Dromaeosauridae) from the Hell Creek Formation
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Abstract

Most dromaeosaurids were small- to medium-sized cursorial, scansorial, and arboreal, sometimes volant predators, but a comparatively small percentage grew to gigantic proportions. Only two such giant “raptors” have been described from North America. Here, we describe a new giant dromaeosaurid, Dakotaraptor steini gen. et sp. nov., from the Hell Creek Formation of South Dakota. The discovery represents the first giant dromaeosaur from the Hell Creek Formation, and the most recent in the fossil record worldwide. A row of prominent ulnar papilli or “quill knobs” on the ulna is our first clear evidence for feather quills on a large dromaeosaurid forearm and impacts evolutionary reconstructions and functional morphology of such derived, typically flight-related features. The presence of this new predator expands our record of theropod diversity in latest Cretaceous Laramidia, and radically changes paleoecological reconstructions of the Hell Creek Formation.

Copyright © 2015, The University of Kansas, Paleontological Institute
Robert A. DePalma, David A. Burnham, Larry D. Martin, Peter L. Larson, and Robert T. Bakker "The First Giant Raptor (Theropoda: Dromaeosauridae) from the Hell Creek Formation," Paleontological Contributions 2015(14), 1-16, (1 October 2015). https://doi.org/10.17161/paleo.1808.18764
Published: 1 October 2015
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