ACKNOWLEDGMENTS
We would like to acknowledge C. Sidor and the Dinosaur Fund of UWBM for logistical and travel support in Nebraska; S. Tucker and G. Corner of UNSM for logistical support and access to comparative material; R. Cifelli, J. Person, and J. Larsen of SNOMNH for access to specimens; C. Mehling and M. Norrell of AMNH for access to comparative material; D. Berman and A. Henrici of Carnegie Museum for access to comparative material; and K. Scott and S. Sumida for providing helpful discussion on biostratigraphy of the Halgaito Formation, Utah, and relevant references. We also thank the handling editor J. Anderson, reviewer R. Kissel, and an anonymous reviewer for improving the manuscript.
Handling editor: Jason Anderson