Tematica Animali preistorici

Pachyrhinosaurus lakustai Currie,Langston & Tanke, 2008

Phylum: Chordata Haeckel, 1874

Subphylum: Vertebrata Cuvier, 1812

Classe: Dinosauria Owen, 1841

Ordine: Ornithischia Seeley, 1888

Famiglia: Ceratopsidae Marsh, 1890

Genere: Pachyrhinosaurus Sternberg, 1950

Descrizione

È la specie più antica dei Pachyrhinosaurus.

Diffusione

Il genere Pachyrhinosaurus è un dinosauro ceratopsio centrosaurino vissuto nel Cretaceo superiore, circa 73,5-66 milioni di anni fa (Campaniano-Maastrichtiano), in diversi siti dell'Alberta e dell'Alaska, in Nord America. I primi esemplari furono scoperti da Charles M. Sternberg in Alberta, Canada, nel 1946 e successivamente nominati nel 1950. I vari siti di estrazione hanno restituito più di una dozzina di teschi parziali e un vasto assortimento di altri fossili di varie specie. Tuttavia, questi fossili vennero ritrovati solo negli anni '80, con un conseguente aumento relativamente recente di interesse per il Pachyrhinosaurus. La specie P. lakustai è la specie più antica, conosciuta dalla Formazione Wapiti, i cui bonebeds sono approssimativamente equivalenti a quelli delle formazioni Bearpaw e Horseshoe Canyon, risalente a circa 73,5-72,5 milioni di anni fa.

Bibliografia

–Pachyrhinosaurus-britannica
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–Anthony R. Fiorillo and Ronald S. Tykoski, A new species of the centrosaurine ceratopsid Pachyrhinosaurus from the North Slope (Prince Creek Formation: Maastrichtian) of Alaska, in Acta Palaeontologica Polonica, vol. 57, n. 3, 2012, pp. 561-573.
–Holtz, Thomas R. Jr. (2008) Dinosaurs: The Most Complete, Up-to-Date Encyclopedia for Dinosaur Lovers of All Ages Supplementary Information.
–Anthony R. Fiorillo e Ronald S. Tykoski, An Immature Pachyrhinosaurus perotorum (Dinosauria: Ceratopsidae) Nasal Reveals Unexpected Complexity of Craniofacial Ontogeny and Integument in Pachyrhinosaurus, in PLoS ONE, vol. 8, n. 6, 19 giugno 013, pp. e65802.
–M.J. Ryan, R. Holmes, J. Mallon, M. Loewen e D.C. Evans, A basal ceratopsid (Centrosaurinae: Nasutoceratopsini) from the Oldman Formation (Campanian) of Alberta, Canada, in Canadian Journal of Earth Sciences, vol. 54, 2017.
–C. M. Sternberg, New dinosaur from southern Alberta, representing a new family of the Ceratopsia, in Geological Society of America Bulletin, vol. 58, 1947, p. 1230.
–C. M. Sternberg, Pachyrhinosaurus canadensis, representing a new family of the Ceratopsia, from southern Alberta, in National Museum of Canada Bulletin, vol. 118, 1950, pp. 109-120.
–W. Jr. Langston, The Ceratopsian Dinosaurs and Associated Lower Vertebrates from the St. Mary River Formation (Maestrichtian) at Scabby Butte, Southern Alberta, in Canadian Journal of Earth Sciences, vol. 12, n. 9, 1975, pp. 1576-1608.
–Currie, P.J., Langston, W., and Tanke, D.H. (2008). "A new species of Pachyrhinosaurus (Dinosauria, Ceratopsidae) from the Upper Cretaceous of Alberta, Canada." pp. 1-108. In: Currie, P.J., Langston, W., and Tanke, D.H. 2008. A New Horned Dinosaur from an Upper Cretaceous Bone Bed in Alberta. NRC Research Press, Ottawa, Ontario, Canada. 144 pp.
–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.
–AR Fiorillo e RS Tykoski, An Immature Pachyrhinosaurus perotorum (Dinosauria: Ceratopsidae) Nasal Reveals Unexpected Complexity of Craniofacial Ontogeny and Integument in Pachyrhinosaurus, in PLoS ONE, vol. 8, n. 6, 2013, p. e65802.
–Gregory M. Erickson e Patrick S. Druckenmiller, Longevity and growth rate estimates for a polar dinosaur: aPachyrhinosaurus(Dinosauria: Neoceratopsia) specimen from the North Slope of Alaska showing a complete developmental record, in Historical Biology, vol. 23, n. 4, December 2011, pp. 327-334.
–Rosenberg, Gary D. e Wolberg, Donald L., Dino fest : proceedings of a conference for the general public, March 24, 1994, Geology Dept., Indiana University-Purdue University, 1994.
–Weishampel, D.B.; Dodson, P. & Osmolska, H., The Dinosauria (Second ed.), Berkeley, University of California Press, 2004, pp. 577-584.
–"The first juvenile dromaeosaurid (Dinosauria: Theropoda) from Arctic Alaska". PLOS ONE 15 (7) (2020).
–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.
–Peter Dodson, The Horned Dinosaurs: A Natural History, Princeton, Princeton University Press, 1996, pp. 14-15.
–Annie Quinney, François Therrien, Darla K. Zelenitsky, David A. Eberth. Palaeoenvironmental and palaeoclimatic reconstruction of the Upper Cretaceous (late Campanian–early Maastrichtian) Horseshoe Canyon Formation, Alberta, Canada. Palaeogeography, Palaeoclimatology, Palaeoecology 371: 26-44.
–Lehman, 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.
–Annie Quinney, François Therrien, Darla K. Zelenitsky e David A. Eberth, Palaeoenvironmental and palaeoclimatic reconstruction of the Upper Cretaceous (late Campanian–early Maastrichtian) Horseshoe Canyon Formation, Alberta, Canada, in Palaeogeography, Palaeoclimatology, Palaeoecology, vol. 371, pp. 26-44.
–Arbour, Victoria (2010). "A Cretaceous armoury: Multiple ankylosaurid taxa in the Late Cretaceous of Alberta, Canada and Montana, USA". Journal of Vertebrate Paleontology 30 (Supplement 2): 55A.
–Derek W. Larson, Donald B. Brinkman e Phil R. Bell, Faunal assemblages from the upper Horseshoe Canyon Formation, an early Maastrichtian cool-climate assemblage from Alberta, with special reference to the Albertosaurus sarcophagus bonebed, in Canadian Journal of Earth Sciences, vol. 47, 2010, pp. 1159-1181.
–Weishampel, David B.; Dodson, Peter; and Osmólska, Halszka (eds.): The Dinosauria, 2nd, Berkeley: University of California Press. (2004) 861 pp.
–2010 Arctic Winter Games Hosts One-Year-Out Celebration, su awg2010.org, Arctic Winter Games Host Society, 8 marzo 2009.

	Data: 31/08/2012 Emissione: Animali preistorici Stato: Burundi Nota: Emesso in un foglietto di 4 v. diversi

	Data: 30/12/2015 Emissione: Animali preistorici Stato: Togo Nota: Emesso in un foglietto di 4 v. diversi

	Data: 01/01/2016 Emissione: Animali preistorici Stato: Somalia Nota: Emesso in un foglietto di 4 v. diversi

	Data: 31/08/2012 Emissione: Animali preistorici Stato: Burundi