Thomas R. Holtz, Jr.
Vertebrate Paleontologist

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Pedal (foot) claw of of the oviraptorosaur dinosaur Anzu. July 2013, near Ekalaka, MT

Senior Lecturer
Department of Geology
University of Maryland
College Park, MD 20742

Faculty Director, former Earth, Life & Time Program
Faculty Director, Science & Global Change Program
College Park Scholars

Adjunct Faculty, Behavior, Ecology, Evolution, Systematics Program
Research Associate, National Museum of Natural History, Smithsonian Institution

Email: tholtz@geol.umd.edu
Phone: (301) 405-4084
Fax (Geology): (301) 314-9661
Fax (CPS): (301) 405-0796
Office: 1216 Centreville Hall
(Temporary Office [Summer 2012]: 1122 Cumberland Hall)
Mailing Address:

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Homo sapiens, with skull of Giganotosaurus carolinii for scale

Research Interests

Education

Courses Taught at UMCP

Forthcoming Conferences

PaleoFest 2013, Burpee Museum of Natural History, Rockford, IL, March 2-3, 2013


73rd Annual Meeting of the Society of Vertebrate Paleontology, Los Angeles, October 30-November 2, 2013

Societies

Recent Publications

  • Farlow, J.O., T.R. Holtz, Jr., T.H. Worthy & R.E. Chapman. 2013. Feet of the fierce (and not so fierce): pedal proportions in large theropods, other non-avian dinosaurs, and large ground birds. Pp. 88-132, in J.M. Parrish, R.E. Molar, P.J. Currie, and E.B. Koppelhus (eds.) Tyrannosaurid Paleobiology. Indiana University Press.
  • Brett-Surman, M.K., T.R. Holtz, Jr. & J.O. Farlow (eds.) 2012. The Complete Dinosaur. 2nd Edition. Indiana University Press. 1112 pp.
  • Holtz, T.R., Jr. 2012. Dinosaur hunters of the Southern Continents. Pp. 107-118, in M.K. Brett-Surman, T.R. Holtz, Jr. & J.O. Farlow (eds.) 2012. The Complete Dinosaur. 2nd Edition. Indiana University Press.
  • Holtz, T.R., Jr. & M.K. Brett-Surman. 2012. The osteology of dinosaurs. Pp. 135-149, in M.K. Brett-Surman, T.R. Holtz, Jr. & J.O. Farlow (eds.) 2012. The Complete Dinosaur. 2nd Edition. Indiana University Press.
  • Holtz, T.R., Jr. & M.K. Brett-Surman. 2012. The taxonomy and systematics of the dinosaurs. Pp. 209-223, in M.K. Brett-Surman, T.R. Holtz, Jr. & J.O. Farlow (eds.) 2012. The Complete Dinosaur. 2nd Edition. Indiana University Press.
  • Holtz, T.R., Jr. 2012. Theropods. Pp. 346-378, in M.K. Brett-Surman, T.R. Holtz, Jr. & J.O. Farlow (eds.) 2012. The Complete Dinosaur. 2nd Edition. Indiana University Press.
  • Holtz, T.R., Jr. 2008. A critical re-appraisal of the obligate scavenging hypothesis for Tyrannosaurus rex and other tyrant dinosaurs. Pp. 370-396, in P. Larson and K. Carpenter (eds.), Tyrannosaurus rex: The Tyrant King. Indiana University Press.
  • France, C.A.M., P.M. Zelanko, A.J. Kaufman & T.R. Holtz. 2007. Carbon and nitrogen isotopic analysis of Pleistocene mammals from the Saltville Quarry (Virginia, USA): Implications for trophic relationships. Palaeogeography, Palaeoclimatology, Palaeoecology 249: 271-282.
  • Holtz, T.R., Jr. 2006. Palaeontology: A Jurassic tyrant is crowned. Nature 439: 665-666.
  • Holtz, T.R., Jr. & H. Osmólska. 2004. Saurischia. Pp. 21-24, in D.B. Weishampel, P. Dodson and H. Osmólska (eds.), The Dinosauria. Second Edition. University of California Press.
  • Holtz, T.R., Jr., R.E. Molnar & P.J. Currie. 2004. Basal Tetanurae. Pp. 71-110, in D.B. Weishampel, P. Dodson and H. Osmólska (eds.), The Dinosauria. Second Edition. University of California Press.
  • Holtz, T.R., Jr. 2004. Tyrannosauroidea. Pp. 111-136, in D.B. Weishampel, P. Dodson and H. Osmólska (eds.), The Dinosauria. Second Edition. University of California Press.
  • Holtz, T.R., Jr., R.E. Chapman & M.C. Lamanna. 2004. Mesozoic biogeography of Dinosauria, Pp. 627-642 in D.B. Weishampel, P. Dodson and H. Osmólska (eds.), The Dinosauria. Second Edition. University of California Press.
  • Holtz, T.R., Jr. 2003. Dinosaur predation: evidence and ecomorphology. Pp. 325-340, in P.H. Kelley, M. Kowalewski and T.A Hansen (eds.), Predator-Prey Interactions in the Fossil Record, Topics in Geobiology Vol. 20. Kluwer Press.
  • Farlow, J.O. & T.R. Holtz, Jr. 2002. The fossil record of predation in dinosaurs. Pp. 251-266, in M. Kowalewski & P.H. Kelley (eds.), The Fossil Record of Predation. The Paleontological Society Papers 8.
  • Holtz, T.R., Jr. 2002. Chasing Tyrannosaurus and Deinonychus around the Tree of Life: classifying dinosaurs. Pp. 31-38, in J.G. Scotchmoor, D.A. Springer, B.H. Breithaupt & A.F. Fiorillo (eds.), Dinosaurs: The Science Behind the Stories, Society of Vertebrate Paleontology, Paleontological Society & American Geological Institute.
  • Holtz, T.R., Jr. 2001. Arctometatarsalia revisited: the problem of homplasy in reconstructing theropod phylogeny. Pp. 99-122, in J. Gauthier and L.F. Gall (eds. ), New Perspectives on the Origin and Early Evolution of Birds: Proceedings of the International Symposium in Honor of John H. Ostrom. Yale Univ. Press.
  • Holtz, T.R., Jr. 2001. The phylogeny and taxonomy of the Tyrannosauridae. Pp. 64-83, in D.H. Tanke and K. Carpenter (eds.), Mesozoic Vertebrate Life: New Research Inspired by the Paleontology of Philip J. Currie. Indiana Univ. Press.
  • Farlow, J.O., S. M. Gatesy, T.R. Holtz, Jr., J.R. Hutchinson & J.M. Robinson. 2000. Theropod locomotion. American Zoologist 40:640-663.
  • Holtz, T.R., Jr. 2000. Classification and evolution of dinosaur groups. Pp. 140-168, in G.S. Paul (ed.), The Scientific American Book of Dinosaurs. St. Martin's Press.
  • Holtz, T.R., Jr. 2000. Theropod paleobiology: more than just bird origins. Gaia 15: 1-3.
  • Holtz, T.R., Jr. 2000. A new phylogeny of the carnivorous dinosaurs. Gaia 15: 5-61.
  • Holtz, T.R., Jr., D.L. Brinkman & C.L. Chandler. 2000. Denticle morphometrics and a possibly omnivorous feeding habit for the theropod dinosaur Troodon. Gaia 15: 159-166.
  • Padian, K., J.R. Hutchinson & T.R. Holtz, Jr. 1999. Phylogenetic definitions and nomenclature of the major taxonomic categories of the carnivorous Dinosauria (Theropoda). Journal of Vertebrate Paleontology 19: 69-80.
  • Holtz, T.R., Jr. 1998. Spinosaurs as crocodile mimics. Science 282: 1276-1277.
  • Holtz, T.R., Jr. 1997. Dinosaur hunters of the Southern Continents. Pp. 43-51, in J.O. Farlow & M.K. Brett-Surman (eds.), The Complete Dinosaur. Indiana Univ. Press.
  • Holtz, T.R., Jr. & M.K. Brett-Surman. 1997. The osteology of the dinosaurs. Pp. 78-91, in J.O. Farlow & M.K. Brett-Surman (eds.), The Complete Dinosaur. Indiana Univ. Press.
  • Holtz, T.R., Jr. & M.K. Brett-Surman. 1997. The taxonomy and systematics of the dinosaurs. Pp. 92-106, in J.O. Farlow & M.K. Brett-Surman (eds.), The Complete Dinosaur. Indiana Univ. Press.
  • Holtz, T.R., Jr. 1996. Phylogenetic taxonomy of the Coelurosauria (Dinosauria: Theropoda). Journal of Paleontology 70: 536-538.
  • Holtz, T.R., Jr. 1995. The arctometatarsalian pes, an unusual structure of the metatarsus of Cretaceous Theropoda (Dinosauria: Saurischia). Journal of Vertebrate Paleontology 14: 480-519.
  • Holtz, T.R., Jr. 1994. The phylogenetic position of the Tyrannosauridae: implications for theropod systematics. Journal of Paleontology 68: 1100-1117.

    Recent Web-based Publications

    Recent Phylogenetic Databases


    Holtz, T.R., Jr. (illustrations by L. Rey). 2007. Dinosaurs: The Most Complete Up-To-Date Encyclopedia for Dinosaur Lovers of All Ages. Random House, 428 pp. Supplementary information (including chapter updates) available at http://www.geol.umd.edu/~tholtz/dinoappendix/.

    Links

  • List of paleontological e-journals in the UMCP library
  • Wikipedia entry, and EvoWiki, too!
  • "Bizarre Dinosaurs: What's Wrong With This Picture? An Audio Critique", audio commentary by me on National Geographic's review of some of their historic dinosaur art
  • Interview with Tom Holtz in College Park Magazine
  • Interviews on Exn.ca (and again), MSNBC, The Bone Zone, and Paleozoica
  • Radio interview (in RealAudio) with Drs. Mike Novacek (American Museum of Natural History) and Tom Holtz on the March 1, 2002 episode of Public Interest with Kojo Nnamdi, WAMU 88.5 FM
  • Article by Holtz on bird origins for MSNBC.com's Mysteries of the Universe, Feb. 12, 1999
  • My Internet Movie Database page (?!?!?!)
  • My audio commentary on old (1940-2000) dinosaur illustrations from National Geographic Magazine

    For Fun

  • Tom Holtz's science fictional appearances:
  • Parry and Carney, Friends for Life, a dinosaur-based webcomic by former UMd student (and veteran of my first Honors Seminar), Mike Keesey
  • Doctor Fun's Cartoons
  • Charley Parker's Dinosaur Cartoons (and the original site)

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    Chelonoidis elephantopus and Homo sapiens.

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