Implications of beak morphology for the evolutionary paleoecology of the megaherbivorous dinosaurs from the Dinosaur Park Formation (upper Campanian) of Alberta, Canada

Palaeogeography, Palaeoclimatology, Palaeoecology

Volumn 394, Issue , 2014, Pages 29-41

  Mallon, Jordan C ^a   Anderson, Jason S ^a  

^a UNIVERSITY OF CALGARY   (Canada)

Author keywords

Ankylosauria; Beak morphology; Ceratopsidae; Dinosaur Park Formation; Evolutionary paleoecology; Hadrosauridae

Indexed keywords

BODY SIZE; CAMPANIAN; DIET; DINOSAUR; EVOLUTIONARILY STABLE STRATEGY; FEEDING MECHANISM; FOSSIL RECORD; HERBIVORE; MORPHOLOGY; MORPHOMETRY; NUTRITIVE VALUE; PALEOECOLOGY;

ALBERTA; CANADA;

EID: 84890809972     PISSN: 00310182     EISSN: None     Source Type: Journal    
DOI: 10.1016/j.palaeo.2013.11.014     Document Type: Article

References (127)

1. Abel O. Diskussion zu den Vorträgen R. Kräusel und F. Versluys. Paläont. Z. 1922, 4:87.
2. Adams D.C., Rohlf F.J., Slice D.E. Geometric morphometrics: ten years of progress following the 'revolution'. Ital. J. Zool. 2004, 71:5-16.
3. Anderson M.J. A new method for non-parametric multivariate analysis of variance. Aust. Ecol. 2001, 26:32-46.
4. Arbour V.M., Burns M.E., Sissons R.L. A redescription of the ankylosaurid dinosaur Dyoplosaurus acutosquameus Parks, 1924 (Ornithischia: Ankylosauria) and a revision of the genus. J. Vertebr. Paleontol. 2009, 29:1117-1135.
5. Archibald J.D. Dinosaur Extinction and the End of an Era: What the Fossils Say 1996, Columbia University Press, New York.
6. Bakker R.T. Dinosaur feeding behaviour and the origin of flowering plants. Nature 1978, 274:661-663.
7. Bakker R.T. The Dinosaur Heresies: New Theories Unlocking the Mystery of the Dinosaurs and their Extinction 1986, Zebra Books, New York.
8. Beerling D.J. Modelling palaeophotosynthesis: Late Cretaceous to present. Phil. Trans. R. Soc. B 1994, 346:421-432.
9. Beerling D.J. Global terrestrial productivity in the Mesozoic era. Geol. Soc. London Spec. Publ. 2000, 181:17-32.
10. Behrensmeyer A.K., Hook R.W. Paleoenvironmental contexts and taphonomic modes. Terrestrial Ecosystems Through Time: Evolutionary Paleoecology of Terrestrial Plants and Animals 1992, 15-136. University of Chicago Press, Chicago. A.K. Behrensmeyer, J.D. Damuth, W.A. DiMichele, R. Potts, H.-D. Sues, S.L. Wing (Eds.).
11. Béland P., Russell D.A. Paleoecology of Dinosaur Provincial Park (Cretaceous), Alberta, interpreted from the distribution of articulated vertebrate remains. Can. J. Earth Sci. 1978, 15:1012-1024.
12. Bookstein F.L. Landmark methods for forms without landmarks: morphometrics of group differences in outline shape. Med. Image Anal. 1997, 1:225-243.
13. Bookstein F., Schäfer K., Prossinger H., Seidler H., Fieder M., Stringer C., Weber G.W., Arsuaga J.-L., Slice D.E., Rohlf F.J., Recheis W., Mariam A.J., Marcus L.F. Comparing frontal cranial profiles in archaic and modern Homo by morphometric analysis. Anat. Rec. 1999, 257:217-224.
14. Braman D.R., Koppelhus E.B. Campanian palynomorphs. Dinosaur Provincial Park: A Spectacular Ancient Ecosystem Revealed 2005, 101-130. Indiana University Press, Bloomington. P.J. Currie, E.B. Koppelhus (Eds.).
15. Brinkman D.B., Russell A.P., Eberth D.A., Peng J. Vertebrate palaeocommunities of the lower Judith River Group (Campanian) of southeastern Alberta, Canada, as interpreted from vertebrate microfossil assemblages. Palaeogeogr. Palaeoclimatol. Palaeoecol. 2004, 213:295-313.
16. Brown C.M., Evans D.C., Campione N.E., O'Brien L.J., Eberth D.A. Evidence for taphonomic size bias in the Dinosaur Park Formation (Campanian, Alberta), a model Mesozoic terrestrial alluvial-paralic system. Palaeogeogr. Palaeoclimatol. Palaeoecol. 2012, 372:108-122.
17. Butler R.J., Upchurch P., Norman D.B. The phylogeny of the ornithischian dinosaurs. J. Syst. Palaeontol. 2008, 6:1-40.
18. Carpenter K. Skeletal and dermal armor reconstructions of Euoplocephalus tutus (Ornithischia: Ankylosauridae) from the Late Cretaceous Oldman Formation of Alberta. Can. J. Earth Sci. 1982, 19:689-697.
19. Carpenter K. Ankylosaur systematics: example using Panoplosaurus and Edmontonia (Ankylosauria: Nodosauridae). Dinosaur Systematics: Approaches and Perspectives 1990, 281-298. Cambridge University Press, Cambridge. K. Carpenter, P.J. Currie (Eds.).
20. Carpenter K. Ankylosauria. Encyclopedia of Dinosaurs 1997, 16-20. Academic Press, San Diego. P.J. Currie, K. Padian (Eds.).
21. Carpenter K. Ankylosaurs. The Complete Dinosaur 1997, 307-316. Indiana University Press, Bloomington. J.O. Farlow, M.K. Brett-Surman (Eds.).
22. Carpenter K. Redescription of Ankylosaurus magniventris Brown 1908 (Ankylosauridae) from the Upper Cretaceous of the Western Interior of North America. Can. J. Earth Sci. 2004, 41:961-986.
23. Carrano M.T., Janis C.M., Sepkoski J.J. Hadrosaurs as ungulate parallels: lost lifestyles and deficient data. Acta Palaeontol. Pol. 1999, 44:237-261.
24. Charnov E.L. Optimal foraging, the marginal value theorem. Theor. Popul. Biol. 1976, 9:129-136.
25. Chin K. The paleobiological implications of herbivorous dinosaur coprolites from the Upper Cretaceous Two Medicine Formation of Montana: why eat wood?. Palaios 2007, 22:554-566.
26. Chin K., Gill B.D. Dinosaurs, dung beetles, and conifers: participants in a Cretaceous food web. Palaios 1996, 11:280-285.
27. Coe M.J., Dilcher D.L., Farlow J.O., Jarzen D.M., Russell D.A. Dinosaurs and land plants. The Origins of Angiosperms and Their Biological Consequences 1987, 225-258. Cambridge University Press, Cambridge. E.M. Friis, W.G. Chaloner, P.R. Crane (Eds.).
28. Crane P.R. Vegetational consequences of the angiosperm diversification. The Origins of Angiosperms and Their Biological Consequences 1987, 107-144. Cambridge University Press, Cambridge. E.M. Friis, W.G. Chaloner, P.R. Crane (Eds.).
29. Currie P.J., Koppelhus E.B., Muhammad A.F. Stomach contents of a hadrosaur from the Dinosaur Park Formation (Campanian, Upper Cretaceous) of Alberta, Canada. Sixth Symposium on Mesozoic Terrestrial Ecosystems and Biota, Short Papers 1995, 111-114. China Ocean Press, Beijing. A. Sun, Y. Wang (Eds.).
30. Decherd S.M. Primary Productivity and Forage Quality of Ginkgo biloba in Response to Elevated Carbon Dioxide and Oxygen - An Experimental Approach to Mid-Mesozoic Paleoecology 2006, (Ph.D. thesis), North Carolina State University.
31. DiMichele W.A., Behrensmeyer A.K., Olszewski T.D., Labandeira C.C., Pandolfi J.M., Wing S.L., Bobe R. Long-term stasis in ecological assemblages: evidence from the fossil record. Annu. Rev. Ecol. Evol. Syst. 2004, 35:285-322.
32. Dodson P. Taxonomic implications of relative growth in lambeosaurine hadrosaurs. Syst. Biol. 1975, 24:37-54.
33. Dodson P. A faunal review of the Judith River (Oldman) Formation, Dinosaur Provincial Park, Alberta. Mosasaur 1983, 1:89-118.
34. Dodson P., Forster C.A., Sampson S.D. Ceratopsidae. The Dinosauria 2004, 494-513. University of California Press, Berkeley. second ed. D.B. Weishampel, P. Dodson, H. Osmólska (Eds.).
35. Dompierre H., Churcher C.S. Premaxillary shape as an indicator of the diet of seven extinct late Cenozoic New World camels. J. Vertebr. Paleontol. 1996, 16:141-148.
36. Eberth D.A. The geology. Dinosaur Provincial Park: A Spectacular Ancient Ecosystem Revealed 2005, 54-82. Indiana Unviersity Press, Bloomington. P.J. Currie, E.B. Koppelhus (Eds.).
37. Erickson G.M., Krick B.A., Hamilton M., Bourne G.R., Norell M.A., Lilleodden E., Sawyer W.G. Complex dental structure and wear biomechanics in hadrosaurid dinosaurs. Science 2012, 338:98-101.
38. Evans D.C. Ontogeny and Evolution of Lambeosaurine Dinosaurs (Ornithischia: Hadrosauridae) 2007, (Ph. D. thesis), University of Toronto.
39. Farke A.A., Ryan M.J., Barrett P.M., Tanke D.H., Braman D.R., Loewen M.A., Graham M.R. A new centrosaurine from the Late Cretaceous of Alberta, Canada, and the evolution of parietal ornamentation in horned dinosaurs. Acta Palaeontol. Pol. 2011, 56:691-702.
40. Farke A.A., Chok D.J., Herrero A., Scolieri B., Werning S. Ontogeny in the tube-crested dinosaur Parasaurolophus (Hadrosauridae) and heterochrony in hadrosaurids. Peer J. 2013, 1:e182. 10.7717/peerj.182.
41. Farlow J.O. A consideration of the trophic dynamics of a Late Cretaceous large-dinosaur community (Oldman Formation). Ecology 1976, 57:841-857.
42. Farlow J.O., Dodson P., Chinsamy A. Dinosaur biology. Annu. Rev. Ecol. Syst. 1995, 26:445-471.
43. Fraser D., Theodor J.M. Anterior dentary shape as an indicator of diet in ruminant artiodactyls. J. Vertebr. Paleontol. 2011, 31:1366-1375.
44. Galton P.M. The cheeks of ornithischian dinosaurs. Lethaia 1973, 6:67-89.
45. Galton P.M. Herbivorous adaptations of Late Triassic and Early Jurassic dinosaurs. The Beginning of the Age of Dinosaurs: Faunal Change Across the Triassic-Jurassic Boundary 1986, 203-221. Cambridge University Press, Cambridge. K. Padian (Ed.).
46. Gee C.T. Dietary options for the sauropod dinosaurs from an integrated botanical and paleobotanical perspective. Biology of the Sauropod Dinosaurs: Understanding the Life of Giants 2010, 34-56. Indiana University Press, Bloomington. N. Klein, K. Remes, C.T. Gee, P.M. Sander (Eds.).
47. Gordon I.J., Illius A.W. Incisor arcade structure and diet selection in ruminants. Funct. Ecol. 1988, 2:15-22.
48. Green W.D.K. The thin-plate spine and images with curving features. Image Fusion and Shape Variability 1996, 79-87. University of Leeds Press, Leeds. K.V. Mardia, C.A. Gill, I.L. Dryden (Eds.).
49. Haas G. On the jaw musculature of ankylosaurs. Am. Mus. Novit. 1969, 2399:1-11.
50. Hammer Ø., Harper D. Paleontological Data Analysis 2006, Blackwell Publishing, Malden, Massachusetts.
51. Hammer Ø., Harper D.A.T., Ryan P.D. PAST: paleontological statistics software package for education and data analysis. Palaeontol. Electron. 2001, 4(1). (9 pp. http://palaeo-electronica.org/2001_1/past/issue1_01.htm).
52. Hanley T.A. The nutritional basis for food selection by ungulates. J. Range Manag. 1982, 35:146-151.
53. Henderson D.M. Skull shape as indicators of niche partitioning by sympatric chasmosaurine and centrosaurine dinosaurs. New Perspectives on Horned Dinosaurs: The Royal Tyrrell Museum Ceratopsian Symposium 2010, 293-307. Indiana University Press, Bloomington. M.J. Ryan, B.J. Chinnery-Algeier, D.A. Eberth (Eds.).
54. Hofmann R.R., Stewart D.R.M. Grazer or browser: a classification based on the stomach-structure and feeding habits of East African ruminants. Mammalia 1972, 36:226-240.
55. Hummel J., Gee C.T., Südekum K.-H., Sander P.M., Nogge G., Clauss M. In vitro digestibility of fern and gymnosperm foliage: implications for sauropod feeding ecology and diet selection. Proc. R. Soc. B 2008, 275:1015-1021.
56. Janis C.M. Correlation of cranial and dental variables with dietary preferences in mammals: a comparison of macropodoids and ungulates. Queensland Mus. Mem. 1990, 28:349-366.
57. Janis C.M. Correlations between craniodental morphology and feeding behavior in ungulates: reciprocal illumination between living and fossil taxa. Functional Morphology in Vertebrate Paleontology 1995, 76-98. Cambridge University Press, Cambridge. J.J. Thomason (Ed.).
58. Janis C.M., Ehrhardt D. Correlation of relative muzzle width and relative incisor width with dietary preference in ungulates. Zool. J. Linnean Soc. 1988, 92:267-284.
59. Jarman P.J. The social organisation of antelope in relation to their ecology. Behaviour 1974, 48:215-267.
60. King G. Reptiles and Herbivory 1996, Chapman and Hall, London.
61. Koppelhus E.B. Paleobotany. Dinosaur Provincial Park: A Spectacular Ancient Ecosystem Revealed 2005, 131-138. Indiana University Press, Bloomington. P.J. Currie, E.B. Koppelhus (Eds.).
62. Krassilov V.A. Changes of Mesozoic vegetation and the extinction of dinosaurs. Palaeogeogr. Palaeoclimatol. Palaeoecol. 1981, 34:207-224.
63. Kräusel R. Die Nahrung von Trachodon. Paläontol. Z. 1922, 4:80.
64. Lehman T.M. Late Maastrichtian paleoenvironments and dinosaur biogeography in the Western Interior of North America. Palaeogeogr. Palaeoclimatol. Palaeoecol. 1987, 60:189-217.
65. Lehman T.M. Late Campanian dinosaur biogeography in the Western Interior of North America. Dinofest International: Proceedings of a Symposium Sponsored by Arizona State University 1997, 223-240. Academy of Natural Sciences, Philadelphia. D.L. Wolberg, E. Stump, G.D. Rosenberg (Eds.).
66. Lehman T.M. Late Cretaceous dinosaur provinciality. Mesozoic Vertebrate Life 2001, 310-328. Indiana University Press, Bloomington. D.H. Tanke, K. Carpenter (Eds.).
67. Lucas P.W. Dental Functional Morphology: How Teeth Work 2004, Cambridge University Press, Cambridge.
68. Lull R.S. A revision of the Ceratopsia or horned dinosaurs. Mem. Peabody Mus. Nat. Hist. 1933, 3:1-175.
69. MacArthur R.H., Pianka E.R. On optimal use of a patchy environment. Am. Nat. 1966, 100:603-609.
70. MacLeod N. Generalizing and extending the eigenshape method of shape space visualization and analysis. Paleobiology 1999, 25:107-138.
71. Mahalanobis P.C. On the generalised distance in statistics. Proc. Natl. Inst. Sci. India 1936, 2:49-55.
72. Mallon J.C., Anderson J.S. Skull ecomorphology of megaherbivorous dinosaurs from the Dinosaur Park Formation (upper Campanian) of Alberta, Canada. PLoS ONE 2013, 8(7):e67182. 10.1371/journal.pone.0067182.
73. Mallon J.C., Anderson J.S. Jaw mechanics and the evolutionary palaeoecology of the megaherbivorous dinosaurs from the Dinosaur Park Formation (upper Campanian) of Alberta, Canada. J. Vertebr. Paleontol. 2013, (in press).
74. Mallon J.C., Evans D.C., Ryan M.J., Anderson J.S. Megaherbivorous dinosaur turnover in the Dinosaur Park Formation (upper Campanian) of Alberta, Canada. Palaeogeogr. Palaeoclimatol. Palaeoecol. 2012, 350-352:124-138.
75. Mallon J.C., Evans D.C., Ryan M.J., Anderson J.S. Feeding height stratification among the herbivorous dinosaurs from the Dinosaur Park Formation (upper Campanian) of Alberta, Canada. BMC Ecol. 2013, 13:14. 10.1186/1472-6785-13-14.
76. Manchester S.R., Lehman T.M., Wheeler E.A. Fossil palms (Arecaceae, Coryphoideae) associated with juvenile herbivorous dinosaurs in the upper Cretaceous Aguja Formation, Big Bend National Park, Texas. Int. J. Plant Sci. 2010, 171:679-689.
77. Mendoza M., Janis C.M., Palmqvist P. Characterizing complex craniodental patterns related to feeding behaviour in ungulates: a multivariate approach. J. Zool. 2002, 258:223-246.
78. Molnar R.E., Clifford H.T. An ankylosaurian cololite from the Lower Cretaceous of Queensland, Australia. The Armored Dinosaurs 2001, 399-412. Indiana University Press, Bloomington. K. Carpenter (Ed.).
79. Morris W.J. Hadrosaurian dinosaur bills-morphology and function. Los Angeles County. Mus. Contrib. Sci. 1970, 193:1-14.
80. Mustoe G.E. Coevolution of cycads and dinosaurs. Cycad Newsl. 2007, 30:6-9.
81. Nakagawa S. A farewell to Bonferroni: the problems of low statistical power and publication bias. Behav. Ecol. 2004, 15:1044-1045.
82. Nichols D.J., Johnson K.R. Plants and the K-T Boundary 2008, Cambridge University Press, Cambridge.
83. Nopcsa F. Palaeontological notes on reptiles. Geol. Hung. Ser. Palaeontol. 1928, 1:1-84.
84. Oloo T.W., Brett R., Young T.P. Seasonal variation in the feeding ecology of black rhinoceros (Diceros bicornis L.) in Laikipia, Kenya. Afr. J. Ecol. 1994, 32:142-157.
85. Olson E.C. The evolution of a Permian vertebrate chronofauna. Evolution 1952, 6:181-196.
86. Ostrom J.H. A reconsideration of the paleoecology of hadrosaurian dinosaurs. Am. J. Sci. 1964, 262:975-997.
87. Ostrom J.H. A functional analysis of jaw mechanics in the dinosaur Triceratops. Postilla 1964, 88:1-35.
88. Ostrom J.H. Functional morphology and evolution of the ceratopsian dinosaurs. Evolution 1966, 20:290-308.
89. Owen-Smith R.N. Megaherbivores: The Influence of Very Large Body Size on Ecology 1988, Cambridge University Press, Cambridge.
90. Parks W.A. Dyoplosaurus acutosquameus, a new genus and species of armoured dinosaur; and notes on a skeleton of Prosaurolophus maximus. Univ. Toronto Stud. Geol. Ser. 1924, 18:1-35.
91. Penkalski P., Blows W.T. Scolosaurus cutleri (Ornithischia: Ankylosauria) from the Upper Cretaceous Dinosaur Park Formation of Alberta, Canada. Can. J. Earth Sci. 2013, 50:171-182.
92. Perez S.I., Bernal V., Gonzales P.N. Differences between sliding semi-landmark methods in geometric morphometrics, with an application to human craniofacial and dental variation. J. Anat. 2006, 208:769-784.
93. Prasad V., Strömberg C.A.E., Alimohammadian H., Sahni A. Dinosaur coprolites and the early evolution of grasses and grazers. Science 2005, 310:1177-1180.
94. Prieto-Márquez A. Global phylogeny of Hadrosauridae (Dinosauria: Ornithopoda) using parsimony and Bayesian methods. Zool. J. Linnean Soc. 2010, 159:435-502.
95. Rohlf F.J. Relative warp analysis and an example of its application to mosquito wings. Contributions to Morphometrics 1993, 131-159. Museo Nacional de Ciencias Naturales (CSIC), Madrid, Spain. L.F. Martin, A.E. Garcia-Valdecasas (Eds.).
96. Rohlf F.J. tpsDig 2.15 2010, Department of Ecology & Evolution, State University of New York, Stony Brook, New York.
97. Rohlf F.J. tpsUtil 1.46 2010, Department of Ecology & Evolution, State University of New York, Stony Brook, New York.
98. Rohlf F.J. tpsRelW 1.49 2010, Department of Ecology & Evolution, State University of New York, Stony Brook, New York.
99. Rohlf F.J., Bookstein F.L. Computing the uniform component of shape variation. Syst. Biol. 2003, 52:66-69.
100. Russell L.S. Musculature and function in the Ceratopsia. Bull. Natl. Mus. Can. 1935, 77:39-48.
101. Russell L.S. Edmontonia rugosidens (Gilmore), an armoured dinosaur from the Belly River Series of Alberta. Univ. Toronto Stud. Geol. Ser. 1940, 43:1-28.
102. Russell D.A. A vanished world: the dinosaurs of Western Canada. Natl. Mus. Can. Nat. Hist. Ser. 1977, 4:1-142.
103. Rybczynski N., Vickaryous M.K. Evidence of complex jaw movement in the Late Cretaceous ankylosaurid Euoplocephalus tutus (Dinosauria: Thyreophora). The Armored Dinosaurs 2001, 299-317. Indiana University Press, Bloomington. K. Carpenter (Ed.).
104. Sampson S.D. Dinosaur Odyssey: Fossil Threads in the Web of Life 2009, University of California Press, Berkeley.
105. Sampson S.D., Loewen M.A. Unraveling a radiation: a review of the diversity, stratigraphic distribution, biogeography, and evolution of horned dinosaurs (Ornithischia: Ceratopsidae). New Perspectives on Horned Dinosaurs: The Royal Tyrrell Museum Ceratopsian Symposium 2010, 405-427. Indiana University Press, Bloomington. M.J. Ryan, B.J. Chinnery-Allgeier, D.A. Eberth (Eds.).
106. Sampson S.D., Loewen M.A., Farke A.A., Roberts E.M., Forster C.A., Smith J.A., Titus A.L. New horned dinosaurs from Utah provide evidence for intracontinental dinosaur endemism. PLoS One 2010, 5(9):e12292. 10.1371/journal.pone.0012292.
107. Sander P.M., Gee C.T., Hummel J., Clauss M. Mesozoic plants and dinosaur herbivory. Plants in Mesozoic Time: Morphological Innovations, Phylogeny, Ecosystems 2010, 331-359. Indiana University Press, Bloomington. C.T. Gee (Ed.).
108. Sereno P.C., Xijin Z., Lin T. A new psittacosaur from Inner Mongolia and the parrot-like structure and function of the psittacosaur skull. Proc. R. Soc. B 2010, 277:199-209.
109. Sheets H.D. Vis_Proto 2004, Department of Physics, Canisius College, Buffalo, New York.
110. Sheets H.D., Covino K.M., Panasiewicz J.M., Morris S.R. Comparison of geometric morphometric outline methods in the discrimination of age-related differences in feather shape. Front. Zool. 2006, 3:15.
111. Sokal R.R., Rohlf F.J. Biometry 1995, W.H. Freeman and Company, New York. third ed.
112. Solounias N., Moelleken S.M.C. Dietary adaptation of some extinct ruminants determined by premaxillary shape. J. Mammal. 1993, 74:1059-1071.
113. Spencer L.M. Morphological correlates of dietary resource partitioning in the African Bovidae. J. Mammal. 1995, 76:448-471.
114. Sternberg C.M. Hooded hadrosaurs of the Belly River Series of the Upper Cretaceous. Bull. Natl. Mus. Can. 1935, 77:1-37.
115. Taggart R.E., Cross A.T. The relationship between land plant diversity and productivity and patterns of dinosaur herbivory. Dinofest International: Proceedings of a Symposium Sponsored by Arizona State University 1997, 403-416. Academy of Natural Sciences, Philadelphia. D.L. Wolberg, E. Stump, G.D. Rosenberg (Eds.).
116. Tait J., Brown B. How the Ceratopsia carried and used their head. Trans. R. Soc. Can. Ser. 1928, 3(22):13-23.
117. Thompson R.S., Parish J.C., Maidment S.C., Barrett P.M. Phylogeny of the ankylosaurian dinosaurs (Ornithischia: Thyreophora). J. Syst. Palaeontol. 2012, 10:301-312.
118. Tweet J.S., Chin K., Braman D.R., Murphey N.L. Probable gut contents within a specimen of Brachylophosaurus canadensis (Dinosauria: Hadrosauridae) from the Upper Cretaceous Judith River Formation of Montana. Palaios 2008, 23:624-635.
119. Upchurch G.R., Wolfe J.A. Mid-Cretaceous to Early Tertiary vegetation and climate: evidence from fossil leaves and woods. The Origins of Angiosperms and Their Biological Consequences 1987, 75-105. Cambridge University Press, Cambridge. E.M. Friis, W.G. Chaloner, P.R. Crane (Eds.).
120. Vickaryous M.K., Maryańska T., Weishampel D.B. Ankylosauria. The Dinosauria 2004, 363-392. University of California Press, Berkeley. second ed. D.B. Weishampel, P. Dodson, H. Osmólska (Eds.).
121. Weishampel D.B. Interactions between Mesozoic plants and vertebrates: fructifications and seed predation. N. Jb. Geol. Paläont. (Abh.) 1984, 167:224-250.
122. Weishampel D.B., Jianu C.-M. Plant-eaters and ghost lineages: dinosaurian herbivory revisited. Evolution of Herbivory in Terrestrial Vertebrates: Perspectives from the Fossil Record 2000, 123-143. Cambridge University Press, Cambridge. H.-D. Sues (Ed.).
123. Weishampel D.B., Norman D.B. Vertebrate herbivory in the Mesozoic; jaws, plants, and evolutionary metrics. Geol. Soc. Am. Spec. Pap. 1989, 238:87-100.
124. Werner E.E., Gilliam J.F. The ontogenetic niche and species interactions in size-structured populations. Annu. Rev. Ecol. Syst. 1984, 15:393-425.
125. Whitlock J.A. Inferences of diplodocoid (Sauropoda: Dinosauria) feeding behavior from snout shape and microwear analyses. PLoS ONE 2011, 6(4):e18304. 10.1371/journal.pone.0018304.
126. Wolfe J.A., Upchurch G.R. North American nonmarine climates and vegetation during the Late Cretaceous. Palaeogeogr. Palaeoclimatol. Palaeoecol. 1987, 61:33-77.
127. Zelditch M.L., Swiderski D.L., Sheets H.D., Fink W.L. Geometric Morphometrics for Biologists: A Primer 2004, Elsevier Academic Press, San Diego.