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Cranial anatomy and variation in Prosaurolophus maximus (Dinosauria: Hadrosauridae)

Identifieur interne : 002C92 ( Main/Exploration ); précédent : 002C91; suivant : 002C93

Cranial anatomy and variation in Prosaurolophus maximus (Dinosauria: Hadrosauridae)

Auteurs : Christopher T. Mcgarrity [Canada] ; Nicolas E. Campione [Canada] ; David C. Evans [Canada]

Source :

RBID : ISTEX:FE41F202F230BEAB096486206AB3BC89C7A460A7

Descripteurs français

English descriptors

Abstract

Prosaurolophus maximus Brown is a saurolophine hadrosaurid known from numerous complete, articulated skulls from the Dinosaur Park Formation (Campanian, Alberta, Canada) that range in size by approximately half a metre in total skull length. Therefore, it is an important taxon for understanding patterns of growth and variation in saurolophines. This study describes the cranial anatomy of P. maximus from the type locality of Dinosaur Provincial Park (Dinosaur Park Formation: Campanian) on the basis of ten articulated skulls, quantitatively examines its range of osteological variation, and provides the first hypothesized ontogenetic series for this taxon. A second species, Prosaurolophus blackfeetensis Horner, was named on the basis of geologically younger material from Montana (Two Medicine Formation: Campanian) that is diagnosed by putative morphological differences in the nasal crest. However, considerable nasal crest variation in the sample from the Dinosaur Park Formation does not permit quantitative differentiation of P. blackfeetensis from P. maximus. Furthermore, a species‐level phylogenetic analysis of saurolophines that includes both P. maximus and P. blackfeetensis as originally defined recovers them as sister taxa that do not differ morphologically in the character matrix. Based on both the morphometric and phylogenetic data, this study supports the hypothesis that P. blackfeetensis is a junior synonym of P. maximus, thereby substantially increasing its temporal range to 1.6 million years, and a concomitant period of morphological stasis in this taxon. © 2013 The Linnean Society of London

Url:
DOI: 10.1111/zoj.12009


Affiliations:


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Le document en format XML

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<term>Allometry</term>
<term>Amnh</term>
<term>Ange</term>
<term>Articular</term>
<term>Basioccipital</term>
<term>Basisphenoid</term>
<term>Bearpaw</term>
<term>Bivariate</term>
<term>Bivariate plots</term>
<term>Blackfeetensis</term>
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<term>Boxplot analyses</term>
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<term>Caudomedially</term>
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<term>Circumnarial depression</term>
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<term>Counterpart medially</term>
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<term>Crest height</term>
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<term>Currie</term>
<term>Cuthbertson</term>
<term>Cuthbertson holmes</term>
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<term>Dinosaur</term>
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<term>Dorsolaterally</term>
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<term>Jugal process</term>
<term>Junior synonym</term>
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<term>Lambeosaurine hadrosaurids</term>
<term>Large cracks</term>
<term>Late cretaceous</term>
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<term>Lateral crest length</term>
<term>Lateral view</term>
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<term>Laterosphenoid</term>
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<term>Linnean society</term>
<term>Lull wright</term>
<term>Mandibular</term>
<term>Mandibular condyle</term>
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<term>Mediolaterally</term>
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<term>Rostrodorsal margin</term>
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<term>Rostrolaterally</term>
<term>Rostromedially</term>
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<term>Suture</term>
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<term>Vertebrate paleontology</term>
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<term>Amnh</term>
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<term>Articular</term>
<term>Basioccipital</term>
<term>Basisphenoid</term>
<term>Bearpaw</term>
<term>Bivariate</term>
<term>Bivariate plots</term>
<term>Blackfeetensis</term>
<term>Bolotsky</term>
<term>Bone surface</term>
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<term>Dorsal margin</term>
<term>Dorsal surface</term>
<term>Dorsal view</term>
<term>Dorsally</term>
<term>Dorsolaterally</term>
<term>Dorsomedially</term>
<term>Dorsoventrally</term>
<term>Earth sciences</term>
<term>Eberth</term>
<term>Ectopterygoid</term>
<term>Edmontosaurus</term>
<term>Evans reisz</term>
<term>Exoccipital</term>
<term>External naris</term>
<term>Fenestra</term>
<term>Foramen</term>
<term>Foramen magnum</term>
<term>Fossil record</term>
<term>Frontal</term>
<term>Godefroit</term>
<term>Gryposaurus</term>
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<term>Hadrosaurid</term>
<term>Hadrosauridae</term>
<term>Hadrosaurids</term>
<term>Holotype</term>
<term>Holotype specimen</term>
<term>Horner</term>
<term>Indiana university press</term>
<term>Infratemporal</term>
<term>Infratemporal fenestra</term>
<term>Interdigitated</term>
<term>Jugal</term>
<term>Jugal process</term>
<term>Junior synonym</term>
<term>Lacrimal</term>
<term>Lambeosaurine</term>
<term>Lambeosaurine hadrosaurids</term>
<term>Large cracks</term>
<term>Late cretaceous</term>
<term>Lateral</term>
<term>Lateral crest length</term>
<term>Lateral view</term>
<term>Lateral wall</term>
<term>Laterally</term>
<term>Laterosphenoid</term>
<term>Linnean</term>
<term>Linnean society</term>
<term>Lull wright</term>
<term>Mandibular</term>
<term>Mandibular condyle</term>
<term>Mandibular glenoid</term>
<term>Margin</term>
<term>Maxilla</term>
<term>Maximus</term>
<term>Maximus sample</term>
<term>Mcgarrity</term>
<term>Medial</term>
<term>Medially</term>
<term>Medicine formation</term>
<term>Mediolaterally</term>
<term>Midline</term>
<term>Montana</term>
<term>Morphology</term>
<term>Naris</term>
<term>Nasal</term>
<term>Nasal crest</term>
<term>Natural history</term>
<term>Ontogeny</term>
<term>Oral margin</term>
<term>Orbitosphenoid</term>
<term>Ornithischia</term>
<term>Outlier</term>
<term>Palatine</term>
<term>Paleontology</term>
<term>Parietal</term>
<term>Phylogenetic</term>
<term>Phylogenetic analysis</term>
<term>Poor preservation</term>
<term>Postorbital</term>
<term>Predentary</term>
<term>Prefrontal</term>
<term>Premaxilla</term>
<term>Presphenoid</term>
<term>Prootic</term>
<term>Prosaurolophus</term>
<term>Prosaurolophus blackfeetensis</term>
<term>Prosaurolophus maximus</term>
<term>Pterygoid</term>
<term>Quadrate</term>
<term>Quadrate height</term>
<term>Quadratojugal</term>
<term>Reisz</term>
<term>Robust</term>
<term>Rostral</term>
<term>Rostral margin</term>
<term>Rostral plate</term>
<term>Rostral portion</term>
<term>Rostrally</term>
<term>Rostrocaudally</term>
<term>Rostrodorsal</term>
<term>Rostrodorsal margin</term>
<term>Rostrodorsally</term>
<term>Rostrolaterally</term>
<term>Rostromedially</term>
<term>Rostroventral</term>
<term>Rostroventral margin</term>
<term>Rostroventrally</term>
<term>Rugose</term>
<term>Ryan evans</term>
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<term>Saurolophine</term>
<term>Saurolophus</term>
<term>Saurolophus osborni</term>
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<term>Skull length</term>
<term>Skull roof</term>
<term>Snout</term>
<term>Southern alberta</term>
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<term>Squamosal</term>
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<term>Supratemporal</term>
<term>Supratemporal fenestra</term>
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<term>Sutural</term>
<term>Suture</term>
<term>Taxon</term>
<term>Temporal range</term>
<term>Tooth position</term>
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<term>Trigeminal</term>
<term>Trigeminal foramen</term>
<term>Type locality</term>
<term>Upper cretaceous</term>
<term>Usnm</term>
<term>Varricchio</term>
<term>Ventral</term>
<term>Ventral margin</term>
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<term>Ventromedially</term>
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<term>Weishampel</term>
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<div type="abstract">Prosaurolophus maximus Brown is a saurolophine hadrosaurid known from numerous complete, articulated skulls from the Dinosaur Park Formation (Campanian, Alberta, Canada) that range in size by approximately half a metre in total skull length. Therefore, it is an important taxon for understanding patterns of growth and variation in saurolophines. This study describes the cranial anatomy of P. maximus from the type locality of Dinosaur Provincial Park (Dinosaur Park Formation: Campanian) on the basis of ten articulated skulls, quantitatively examines its range of osteological variation, and provides the first hypothesized ontogenetic series for this taxon. A second species, Prosaurolophus blackfeetensis Horner, was named on the basis of geologically younger material from Montana (Two Medicine Formation: Campanian) that is diagnosed by putative morphological differences in the nasal crest. However, considerable nasal crest variation in the sample from the Dinosaur Park Formation does not permit quantitative differentiation of P. blackfeetensis from P. maximus. Furthermore, a species‐level phylogenetic analysis of saurolophines that includes both P. maximus and P. blackfeetensis as originally defined recovers them as sister taxa that do not differ morphologically in the character matrix. Based on both the morphometric and phylogenetic data, this study supports the hypothesis that P. blackfeetensis is a junior synonym of P. maximus, thereby substantially increasing its temporal range to 1.6 million years, and a concomitant period of morphological stasis in this taxon. © 2013 The Linnean Society of London</div>
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   |flux=    Main
   |étape=   Exploration
   |type=    RBID
   |clé=     ISTEX:FE41F202F230BEAB096486206AB3BC89C7A460A7
   |texte=   Cranial anatomy and variation in Prosaurolophus maximus (Dinosauria: Hadrosauridae)
}}

Wicri

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Data generation: Thu Nov 30 15:26:48 2017. Site generation: Tue Mar 8 16:36:20 2022