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Science 21 September 2007:
Vol. 317. no. 5845, p. 1721
DOI: 10.1126/science.1145076
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Brevia

Feather Quill Knobs in the Dinosaur Velociraptor

Alan H. Turner1*, Peter J. Makovicky2 and Mark A. Norell1

1 Division of Paleontology, American Museum of Natural History, Central Park West at 79th Street, New York, NY 10024–5192, USA.
2 Department of Geology, The Field Museum, 1400 South Lake Shore Drive, Chicago, IL 60605–2496, USA.


Figure 1 Fig. 1. (A) Dorsal view of right ulna of Velociraptor IGM 100/981. (B) Detail of red box in (A), with arrows showing six evenly spaced feather quill knobs. In (B), a cast of IGM 100/981 was used. (C) Dorsal view of right ulna of a turkey vulture (Cathartes). (D) Same view of Cathartes as in (C) but with soft tissue dissected to reveal placement of the secondary feathers and greater secondary coverts relative to the quill knobs. (E) Detail of Cathartes, with one quill completely removed to reveal quill knob. (F) Same view as in (E) but with quill reflected to the left to show placement of quill, knob, and follicular ligament. Follicular ligament indicated with arrow. [View Larger Version of this Image (83K GIF file)]
 

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