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Dakotaraptor, new giant dromaeosaurid from Hell Creek Formation of South Dakota (free pdf)



Ben Creisler
bcreisler@gmail.com


A new paper in open access:

Robert A. DePalma, David A. Burnham, Larry D. Martin†,Peter L. Larson
and Robert T. Bakker (2015)
The first giant raptor (Theropoda: Dromaeosauridae) from the Hell
Creek Formation.
Paleontological Contributions 14 (16 pp.)
URI: http://hdl.handle.net/1808/18764
ISSN: 1946-0279
https://kuscholarworks.ku.edu/handle/1808/18764

PDF:

https://kuscholarworks.ku.edu/bitstream/handle/1808/18764/DePalma%2014.pdf

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.