2013年,菲奥里洛等人描述阿拉斯加科尔维尔河(英语:Colville River (Alaska))可卡科-提古斯科采石场(Kikak-Tegoseak Quarry)的一个不完整鼻骨,并以得州石油富翁兼投资人罗斯·佩罗(Ross Perot)将这个独特的北阿拉斯加物种命名为佩氏厚鼻龙(Pachyrhinosaurus perotorum)。该骨骼编号为DMNH 21460,属于一个未成熟个体。该发现扩大了本属在此区域的已知生存时期。标本具有背向扩张的鼻部装饰,代表生长阶段的中间时期。值得注意的是,作者指出,鼻骨后部显示了厚鼻龙“先前未在其它物种中发现的一定程度的外皮覆盖物复杂性”的证据。这表明鼻部突起部分存在一层厚而长角的垫或角质鞘。[9]
描述
加拿大厚鼻龙的体型比较
估计加拿大厚鼻龙长6—8米(19.7—26.2英尺)、重3—3.6公噸(3.0—3.5長噸;3.3—4.0短噸)。[10][11][12]格雷戈里·保罗(英语:Gregory S. Paul)(Gregory Scott Paul)估计另外两个种拉氏厚鼻龙及佩氏厚鼻龙长5米(16.4英尺)、重2公噸(2.0長噸;2.2短噸)。[11]三者皆为食植动物,拥有强健的颊齿以辅助咀嚼粗糙纤维植物。
^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. Journal of Vertebrate Paleontology. 2009, 29 (4): 1117–1135. S2CID 85665879. doi:10.1671/039.029.0405.
^ 3.03.13.2Anthony R. Fiorillo and Ronald S. Tykoski. A new species of the centrosaurine ceratopsid Pachyrhinosaurus from the North Slope (Prince Creek Formation: Maastrichtian) of Alaska. Acta Palaeontologica Polonica. 2012, 57 (3): 561–573. doi:10.4202/app.2011.0033.
^Sternberg, C. M. Pachyrhinosaurus canadensis, representing a new family of the Ceratopsia, from southern Alberta. National Museum of Canada Bulletin. 1950, 118: 109–120.
^E. B. Koppelhus. 2008. Palynology of the Wapiti Formation in the northwestern part of Alberta with special emphasis on a new Pachyrhinosaur bonebed. International Dinosaur Symposium in Fukui 2008: Recent Progress of the Study on Asian Dinosaurs and Paleoenvironments. Fukui Prefectural Dinosaur Museum, Fukui 65-66.
^Kentaro Chiba; Michael J. Ryan; Federico Fanti; Mark A. Loewen; David C. Evans. New material and systematic re-evaluation of Medusaceratops lokii (Dinosauria, Ceratopsidae) from the Judith River Formation (Campanian, Montana). Journal of Paleontology. 2018,. in press (2): 272–288. S2CID 134031275. doi:10.1017/jpa.2017.62.
^ 14.014.1Erickson, Gregory M.; Druckenmiller, Patrick S. Longevity and growth rate estimates for a polar dinosaur: aPachyrhinosaurus(Dinosauria: Neoceratopsia) specimen from the North Slope of Alaska showing a complete developmental record. Historical Biology. December 2011, 23 (4): 327–334. ISSN 0891-2963. S2CID 129724501. doi:10.1080/08912963.2010.546856.
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^Kososki, B., Reiser, H., Cavitt, C., Detterman, R (1978) A Gravity study of the northern part of the Arctic National Wildlife Range, Alaska. (Geological Survey Bulletin 1440) Bibliography: p. 20-21
^J. Haffty, R. G. Schmidt, L. B. Riley, W. D. Goss. Rocks and Mineral Resources of the Wolf Creek Area, Lewis and Clark and Cascade Counties, Montana: A Descriptive Report on an Area in the Disturbed Belt Along the Eastern Front of the Northern Rocky Mountains in Western Montana, Issues 1441-1446
^ 20.020.1Quinney, Annie; Therrien, François; Zelenitsky, Darla K.; Eberth, David A. Palaeoenvironmental and palaeoclimatic reconstruction of the Upper Cretaceous (late Campanian–early Maastrichtian) Horseshoe Canyon Formation, Alberta, Canada. Palaeogeography, Palaeoclimatology, Palaeoecology. 2013, 371: 26–44. Bibcode:2013PPP...371...26Q. doi:10.1016/j.palaeo.2012.12.009.
^ 21.021.121.221.3Lehman, T. M., 2001, Late Cretaceous dinosaur provinciality: In: Mesozoic Vertebrate Life, edited by Tanke, D. H., and Carpenter, K., Indiana University Press, pp. 310-328.
^Arbour, Victoria. A Cretaceous armoury: Multiple ankylosaurid taxa in the Late Cretaceous of Alberta, Canada and Montana, USA. Journal of Vertebrate Paleontology. 2010, 30: 55A. S2CID 220429286. doi:10.1080/02724634.2010.10411819.
^Weishampel, David B.; Dodson, Peter; and Osmólska, Halszka (eds.): The Dinosauria, 2nd, Berkeley: University of California Press. (2004) 861 pp. ISBN0-520-24209-2.