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> College of Letters and Science
> Department of Earth Sciences
> Faculty and Staff
David J. Varricchio
Assistant Professor of Paleontology
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Contact Information
Office: Traphagen Hall #211
Phone: (406) 994-6907
Email: djv(AT)montana.edu
Education
B.S., Cornell University, 1984
M.S., University of Georgia, 1989
Ph.D., Montana State University, 1995
Paleontology Website
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Dr. Varricchio featured in MSU University News (PDF)
Interview with Dr. Varricchio
about his research
Research Interests
My research focuses on the biology of dinosaurs and largely involves theropods (the group of primarily carnivorous dinosaurs that includes birds) from the Cretaceous of Montana and abroad (China, Africa, Argentina). Where possible, I try to blend anatomic and geologic data within a broader evolutionary context. Currently, I have three main areas of research: taphonomic studies, the dinosaur Troodon, and dinosaur reproduction, particularly the theropod-bird lineage. Ongoing taphonomic studies include 1) the description of a novel ornithomimid bonebed from Inner Mongolia with Paul Sereno (U. Chicago); 2) a study of small theropod taphonomy in the Two Medicine Formation of Montana; and 3), as part of a team of researchers, the re-evaluation of a Maiasaura bonebed using detailed palynologic and geochemical sampling. Several Troodon-related projects continue in an attempt to formulate as complete a picture of a single dinosaur species as possible. Having finished work on Troodon nests, eggs, and embryos, in progress work on this dinosaur includes ontogenetic and osteologic description, re-examination of growth using bone histology with Greg Erickson (Florida State U.), and the documentation of pathologies with Rebecca Hanna (Choteau, MT). The last project still in its incipient stage entails the documentation of reproductive features within the theropod-bird lineage and across the K/T boundary.
Current Graduate Students
Josh Bonde
Robert Kambic
Michael Knell
Frankie Jackson
Ben Scherzer
Joey Stiegler
Ewan Wolff
Selected Publications
Varricchio, D. J. 2005. Bringing up baby. Natural History 114 (4):30-32, 67.
Varricchio, D.J. and Jackson, F. D. 2005 (2003). Origins of avian reproduction: answers and questions from dinosaurs. Palaeovertebrata 32(2-4):149-170.
Varricchio, D.J. and Jackson, F. 2004. Cladistic analysis of eggshell characters: a phylogenic assessment of prismatic dinosaur eggs from the Cretaceous Two Medicine Formation of Montana. Journal of Vertebrate Paleontology 24:931-937.
Meng, Q., Liu, J., Varricchio, D. J., Huang, T., and Gao, C. 2004. Parental care in an ornithischian dinosaur. Nature 431:145-146.
Varricchio, D. J. and Jackson, F. 2004. Two eggs sunny-side up: reproductive physiology in the dinosaur Troodon formosus. pp. 215-233. In P. J. Currie, E. B. Koppelhus, M. A. Shugar, and J. L. Wright (eds.), Feathered Dragons: Studies on the Transition from Dinosaurs to Birds, Indiana University Press.
Currie, P. J. and Varricchio, D. J. 2004. A new dromaeosaurid from the Horseshoe Canyon Formation (Upper Cretaceous) of Alberta, Canada, pp. 112-132. In P. J. Currie, E. B. Koppelhus, M. A. Shugar, and J. L. Wright (eds.), Feathered Dragons: Studies on the Transition from Dinosaurs to Birds, Indiana University Press.
Jackson, F. and Varricchio, D.J. 2003. Abnormal, multilayered eggshell in birds: implications for dinosaur reproductive anatomy? Journal of Vertebrate Paleontology 23:699-702.
Varricchio, D. J., Horner, J. R., and Jackson, F. 2002. Embryos and eggs for the Cretaceous theropod dinosaur Troodon formosus. Journal of Vertebrate Paleontology 22:564-576.
Varricchio, D. J. 2002. A new bird from the Upper Cretaceous Two Medicine Formation of Montana. Canadian Journal of Earth Sciences 39:19-26.
Varricchio, D. J. 2001. Gut contents for a Cretaceous tyrannosaur: implications for theropod dinosaur digestive tracts. Journal of Paleontology 75(2):401-406.
Varricchio, D. J. 2001. Late Cretaceous Oviraptorosaur (Theropoda) Dinosaurs of Montana, pp. 42- 57. In D. Tanke and K. Carpenter (eds). Mesozoic Vertebrate Life. Indiana University Press.
Varricchio, D.J. 2000. Reproduction and Parenting, pp. 279-293. In G. Paul (ed.), The Scientific American Book of Dinosaurs. St. Martin’s Press, New York.
Varricchio, D. J., Jackson, F. and Trueman, C. N. 1999. A nesting trace with eggs for the Cretaceous theropod dinosaur Troodon formosus. Journal of Vertebrate Paleontology 19(1):91-100.
Sereno, P. C., Beck, A. L., Dutheil, D. B., Gado, B., Larsson, H. C. E., Lyon, G. H., Marcot, J. D., Rauhut, O. W.M., Sadlier, R. W., Sidor, C. A., Varricchio, D. J., Wilson, G. P. and Wilson, J. A. 1998. A long-snouted predatory dinosaur from Africa and the Evolution of Spinosaurids. Science 282 (5392):1298-1302.
Varricchio, D. J., Jackson, F., Borkowski, J. and Horner, J. R. 1997. Nest and egg clutches of the dinosaur Troodon formosus and the evolution of avian reproductive traits. Nature 385:247-250.
Varricchio, D.J. 1997. Troodontidae, pp.749-754. In: P.J. Currie and K. Padian (eds.), Encyclopedia of Dinosaurs. Academic Press, San Diego.
Varricchio, D. J. 1995. Taphonomy of Jack's Birthday Site, a diverse dinosaur bone bed from the Upper Cretaceous Two Medicine Formation of Montana. Palaeogeography, Palaeoclimatology, Palaeoecology 114:297-323.
Varricchio, D. J. 1993. Bone microstructure of the Upper Cretaceous theropod dinosaur Troodon formosus. Journal of Vertebrate Paleontology 13(1):99-104.
Varricchio, D. J. and Horner, J. R. 1993. Hadrosaurid and lambeosaurid bone beds from the Upper Cretaceous Two Medicine Formation of Montana: Taphonomic and biological implications. Canadian Journal of Earth Sciences 30:997-1006.
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