Selected Publications

Ryan, M.J. A new basal centrosaurine ceratopsid from the Oldman formation,
southeastern Alberta. In press. Journal of Paleontology.

Ryan, M.J., and A.P. Russell. 2005. A new centrosaurine ceratopsid from the Oldman
Formation of Alberta and its implications for centrosaurine taxonomy and systematics.  Canadian Journal of Earth Sciences 42: 1369-1387.

Ryan, M.J. and D. Evans.  2005. Review of the Ornithischia of Dinosaur Provincial Park. In P.J. Currie and E. Kopplehus (eds.) Dinosaur Provincial Park. Indiana University Press, Bloomington, Indiana. P. 313-348.

Powell, G.L., A.P. Russell, and M.J. Ryan. 2002. Ontogenetic scaling of the cephalic armature in the horned lizard Phrynosoma orbilulare (Squamata: Phrynosomatidae). Journal of Herpetology 36: 57 8-589.

Brinkman, D.B., Eberth, D.A., Ryan, M.J., and P.-j. Chen. 2001. The occurrence of Psittacosaurus xinjiangensis Sereno and Chow, 1988 in the Urho area, Junggar Basin, Xinjiang, Peoples Republic of China, with comments on the definition of the species. Canadian Journal of Earth Sciences 38: 1781-1786.

Eberth, D.A., P.J. Currie, D. B. Brinkman, M.J. Ryan, D.R. Braman, J.D. Gardner, V.D. Lam, D. N. Spivak, and A. G. Neuman. 2001. Alberta's dinosaurs and other fossil vertebrates: Judith River and Edmonton groups (Campanian-Maastrichtian). In C.L. Hills (ed.). Mesozoic and Cenozoic Paleontology in the Western Plains and Rocky Mountains: Guidebook for the Field Trips, Society of Vertebrate Paleontology, 61st Annual Meeting, Bozeman, Montana. Museum of the Rockies Occasional Paper No. 3: 49-75.

Holmes, R.B., C.A. Forster, M.J. Ryan, and K.M. Shepherd. 2001. A new species of Chasmosaurus from the Dinosaur Park Formation of Southern Alberta.  Canadian Journal of Earth Sciences 38: 1423-1438.

Ryan, M.J., and A.P. Russell. 2001. The dinosaurs of Alberta (exclusive of Aves). In D. Tanke and K. Carpenter (eds.) Mesozoic Vertebrate Life: New Research Inspired by the Paleontology of Philip J. Currie. Indiana University Press, Bloomington, Indiana, pp. 279-297.

Ryan, M.J., A.P. Russell, P.J. Currie, and D.A. Eberth.  2001.  Taphonomy of a Centrosaurus (Dinosauria:Ornithischia) bone bed from the Dinosaur Park Formation (Campanian) of Alberta, Canada with comments on cranial ontogeny.  Palaios 16: 482-506.

Ryan, M.J., Currie, P.J., Gardner, G.D., Vickaryous, M.K., and J.M. Lavinge. 2000 [1999]. Baby hadrosaurid material associated with an unusually high abundance of Troodon teeth from the Horseshoe Canyon Formation, Alberta, Canada.  Gaia, 15: 123-133.

Brinkman, D.B., Ryan, M.J., and D.A. Eberth. 1998.  The palaeogeographic and stratigraphic distribution of ceratopsids (Ornithischia) in the Upper Judith River Group of Western Canada. Palaios 13: 160-169.

Ryan, M.J., and P.J. Currie. 1998. First report of Protoceratopsians (Neoceratopsia) from the Late Campanian Judith River Group, Alberta, Canada.  Canadian Journal of Earth Sciences 35: 820-826.

Ryan, M.J. 1997.  Dryosauridae.  In P.J. Currie and K. Padian (eds.).  The Encyclopedia of Dinosaurs, Academic Press, San Diego, California, pp. 197-198.

Ryan, M.J. 1997.  Fruitland Formation.  In P.J. Currie and K. Padian (eds.).  The Encyclopedia of Dinosaurs, Academic Press, San Diego, California, pp. 256-257. 

Ryan, M.J. 1997.  Kirkland Formation.  In P.J. Currie and K. Padian (eds.).  The Encyclopedia of Dinosaurs, Academic Press, San Diego, California, pp. 390-392.

Ryan, M.J. 1997.  Middle Asian Dinosaurs.  In P.J. Currie and K. Padian (eds.).  The Encyclopedia of Dinosaurs, Academic Press, San Diego, California, pp. 442-444.  

Ryan, M.J., and A.P. Russell. 1997.  Color.  In P.J. Currie and K. Padian (eds.).  The Encyclopedia of Dinosaurs, Academic Press, San Diego, California, pp. 134-135. 

Ryan, M.J. and M.K. Vickaryous. 1997.  Diet.  In P.J. Currie and K. Padian (eds.).  The Encyclopedia of Dinosaurs, Academic Press, San Diego, California, pp. 169-174. 

Sampson, S.D., and M.J. Ryan. 1997.  Individual Variation.  In P.J. Currie and K. Padian (eds.) The Encyclopedia of Dinosaurs, Academic Press, San Diego, California, pp. 773-780.

Sampson, S.D., M.J. Ryan, and D.H. Tanke. 1997.  Craniofacial ontogeny in centrosaurine dinosaurs (Ornithischia: Ceratopsidae): Taphonomic and Behavioral Phylogenetic implications. Zoological Journal of the Linnean Society 121: 293-337.

Vickaryous, M.K. and M.J. Ryan. 1997.  Ornamentation.  In P.J. Currie and K. Padian (eds.).  The Encyclopedia of Dinosaurs, Academic Press, San Diego, California, pp. 488-493.

Selected Abstracts

Ryan, M.J., L. Witmer, E. Snively. 2006. Does Nanotyrannus exist? An examination of
the holotype skull CMNH 7541 with comments on the functional morphology of juvenile tyrannosaurs. Alberta Paleontological Society, Tenth Annual Symposium.  Calgary, Alberta. (submitted).

Ryan, M. J., and A.P. Russell. 2006. The status of the problematic taxon Monoclonius
(Ornithischia:Ceratopsidae) and the recognition of adult-sized dinosaur taxa. Geological Society of America, North Central Section (accepted).
Ryan, M. J., and D.C. Evans. 2005. Late Cretaceous Ceratopsids from Alberta and the Recognition of Dinosaurian Faunal Zones within Dinosaur Provincial Park. Dinosaur Provincial Park Symposium, Drumheller, Alberta, Sept. 24-25.

Evans, D.C., and M. J. Ryan. 2005. Hadrosaurid dinosaurs from the Judith River Group,
 Alberta: diversity and biostratigraphy. Dinosaur Provincial Park Symposium, Drumheller, Alberta, Sept. 24-25.

Ryan, M.J., and A.P. Russell. 2005. Trends in Late Cretaceous Ceratopsid Evolution in Western North America.  Alberta Paleontological Society, Ninth Annual Symposium.  Calgary, Alberta, March 19-20.

Ryan, M.J., and A.P. Russell. 2003. New centrosaurine ceratopsids from the late Campanian of Alberta and Montana and a review of contemporaneous and regional patterns of centrosaurine evolution. Journal of Vertebrate Paleontology 23 (Supplement 3): 91A

Ryan, M.J., Russell, A.P., and P.J. Currie.  2002.  Asian small theropods in North America: Evidence from Avimimus.  Alberta Paleontological Society, Sixth Annual Symposium, “Fossils 2002”.  Calgary, Alberta, January 26-27: 44

Ryan, M.J., Russell, A.P., and P.J. Currie.  2002.  The presence of Asian small theropods in North America.  Prairie Universities Biological Symposium, Calgary, Alberta: 57.

Lam, V.D., and M.J. Ryan. 2001.  The Royal Tyrrell Museum Day Digs Program: public supported dinosaur research in the Drumheller Valley. Alberta Palaeontological Society Fifth Annual Symposium, Calgary, Alberta, Abstracts: 24.

Ryan, M.J., Currie, P.J. and A.P. Russell. 2001. New material of Avimimus portentosus.  (Theropoda) from the Iren Dabasu Formation  (upper Cretaceous) of the Erenhot region of Inner Mongolia.  Journal of Vertebrate Paleontology  21(supplement): 95A.

Jacobson, A. R., and M. J. Ryan. 1999.  Taphonomic aspects of theropod tooth-marked bones from an Edmontosaurus bone bed (Early Maastrichtian), Alberta, Canada. Journal of Vertebrate Paleontology 19 (3, supplement): 55A.

Ryan, M.J., and A.P. Russell. 1999.  New horned dinosaurs from the Late Cretaceous (Campanian) of Alberta and Montana with comments on possible evolutionary patterns. Ninth Canadian Paleontology Conference, Calgary, Alberta: 23.

Getty, M., Eberth, D.A., Brinkman, D.B., Ryan, M. 1998. Taphonomy of three Centrosaurus bonebeds in the Dinosaur Park Formation, Alberta, Canada. Journal of Vertebrate Paleontology 18 (3, supplement): 46A.

Ryan, M.J., Eberth, D.A., Brinkman, D.A., and A.P. Russell. 1998.  A sub-adult Styracosaurus (Ornithischia) from the Dinosaur Park Formation (Late Campanian), Alberta, Canada. Journal of Vertebrate Paleontology 18 (supplement): 72A.

Getty, M., Eberth, D.A., Brinkman, D.B., Tanke, D., Ryan, M., and M. Vickaryous. 1997. Taphonomy of two Centrosaurus bonebeds in the Dinosaur Park Formation, Alberta, Canada. Journal of Vertebrate Paleontology 17 (3, supplement): 48A.

Ryan, M.J., Currie, P.J., Gardner, G.D., and J.M. Lavinge. 1997.  Embryonic hadrosaurid material associated with an unusually high abundance of Troodon teeth from the Horseshoe Canyon Formation, Alberta, Canada.  Journal of Vertebrate Paleontology 17 (supplement): 72A.

Ryan, M.J., and P.J. Currie. 1996. First report of Protoceratopsidae (Neoceratopsia) from the Late Campanian Judith River Group, Alberta, Canada. Journal of Vertebrate Paleontology 16 (supplement): 61A.

Ryan, M.J., Bell, J.G., and D.A. Eberth. 1995.  Taphonomy of a hadrosaur (Ornithischia:Hadrosauridae) bone bed from the Horseshoe Canyon Formation (early Maastrichtian), Alberta, Canada. Journal of Vertebrate Paleontology 15 (3, supplement): 51A.

Vickaryous, M.K., Ryan, M.J., Bell, J.G., and D.A. Eberth. 1995.  An excavation of a hadrosaur (Ornithischia) bone bed from the Horseshoe Canyon Formation (early Maastrichtian), Alberta, Canada, as a cost recovery, public participation program.  Fifth Canadian Paleontology Conference, Drumheller, Alberta: 34. 

Ryan, M.J., and A.P. Russell. 1994.  Taphonomy of a Centrosaurus (Ornithischia:Ceratopsidae) bone bed from the Dinosaur Park Formation (Upper Campanian),Alberta, Canada.  Journal of Vertebrate Paleontology 14 (3, supplement): 44A.