Results 81 to 90 of about 173 (103)
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A reevaluation of the manus structure inTriceratops(Ceratopsia: Ceratopsidae)
Journal of Vertebrate Paleontology, 2009ABSTRACT A Triceratops, NSM PV 20379, excavated from the Upper Cretaceous Hell Creek Formation, Bowman County, North Dakota, USA, confirms the articulation of the right forearm. Detailed study of the forelimb anatomy presented here indicates the manus is in a semi-supinated orientation.
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Journal of Vertebrate Paleontology, 1995
ABSTRACT The ceratopsid dinosaur genus Chasmosaurus from the Judith River Formation (Campanian; Judithian) of western Canada shows considerable variability in cranial morphology due in part to an unusually long ontogenetic trajectory. Nevertheless, two more or less distinct morphs can be identified.
Stephen J. Godfrey, Robert Holmes
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ABSTRACT The ceratopsid dinosaur genus Chasmosaurus from the Judith River Formation (Campanian; Judithian) of western Canada shows considerable variability in cranial morphology due in part to an unusually long ontogenetic trajectory. Nevertheless, two more or less distinct morphs can be identified.
Stephen J. Godfrey, Robert Holmes
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PalZ, 2021
An associated incomplete skeleton of a ceratopsid dinosaur from the Campanian deposits of the Allison Member of the Menefee Formation in New Mexico, USA is described. Although it was originally described over two decades ago, newly prepared portions of the Menefee Formation skeleton and reinterpretations of previously known morphology, in addition to ...
Sebastian G. Dalman +4 more
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An associated incomplete skeleton of a ceratopsid dinosaur from the Campanian deposits of the Allison Member of the Menefee Formation in New Mexico, USA is described. Although it was originally described over two decades ago, newly prepared portions of the Menefee Formation skeleton and reinterpretations of previously known morphology, in addition to ...
Sebastian G. Dalman +4 more
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Journal of Vertebrate Paleontology, 2011
ABSTRACT Anchiceratops is a chasmosaurine ceratopsid from the Upper Cretaceous Horseshoe Canyon Formation (HCF) of Alberta. It is distinguished primarily by its unique parietosquamosal frill ornamentation and possibly by the presence of a ventrally flexed olfactory bulb of the brain.
Jordan C. Mallon +4 more
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ABSTRACT Anchiceratops is a chasmosaurine ceratopsid from the Upper Cretaceous Horseshoe Canyon Formation (HCF) of Alberta. It is distinguished primarily by its unique parietosquamosal frill ornamentation and possibly by the presence of a ventrally flexed olfactory bulb of the brain.
Jordan C. Mallon +4 more
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Zootaxa, 2011
A previously undescribed chasmosaurine specimen excavated in 1919-1920 by William Cutler from the Dinosaur Park Formation of Alberta, Canada is referable to Chasmosaurus belli. The specimen comprises an almost complete skull in which, uniquely among Chasmosaurus, the cranial elements are disarticulated, allowing detailed examination of their morphology
Maidment, Susannah, Barrett, Paul
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A previously undescribed chasmosaurine specimen excavated in 1919-1920 by William Cutler from the Dinosaur Park Formation of Alberta, Canada is referable to Chasmosaurus belli. The specimen comprises an almost complete skull in which, uniquely among Chasmosaurus, the cranial elements are disarticulated, allowing detailed examination of their morphology
Maidment, Susannah, Barrett, Paul
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Journal of Paleontology, 2017
AbstractMedusaceratops lokiiRyan, Russell, and Hartman, 2010 is an enigmatic taxon of ceratopsid represented by partial parietals from the Mansfield bonebed in the Campanian Judith River Formation, Montana. Originally, all ceratopsid material collected from this bonebed was referred to the centrosaurine ceratopsidAlbertaceratops, but subsequently two ...
Chiba, Kentaro +4 more
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AbstractMedusaceratops lokiiRyan, Russell, and Hartman, 2010 is an enigmatic taxon of ceratopsid represented by partial parietals from the Mansfield bonebed in the Campanian Judith River Formation, Montana. Originally, all ceratopsid material collected from this bonebed was referred to the centrosaurine ceratopsidAlbertaceratops, but subsequently two ...
Chiba, Kentaro +4 more
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Journal of Vertebrate Paleontology, 2010
ABSTRACT Although they have been considered distinct genera for over a century, ontogenetic analyses reveal that Triceratops and “Torosaurus” actually represent growth stages of a single genus. Major changes in cranial morphology—including the opening of parietal fenestrae and the elongation of the squamosals—occur rapidly, very late in Triceratops ...
John B. Scannella, John R. Horner
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ABSTRACT Although they have been considered distinct genera for over a century, ontogenetic analyses reveal that Triceratops and “Torosaurus” actually represent growth stages of a single genus. Major changes in cranial morphology—including the opening of parietal fenestrae and the elongation of the squamosals—occur rapidly, very late in Triceratops ...
John B. Scannella, John R. Horner
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2023
Pentaceratops sternbergi is a late Campanian ceratopsian predominately known from the San Juan Basin in New Mexico. Previous specimen descriptions and cladistic analyses are based on partial skulls and composite specimens, which places Pentaceratops as an intermediate form between Chasmosaurus and Triceratops.
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Pentaceratops sternbergi is a late Campanian ceratopsian predominately known from the San Juan Basin in New Mexico. Previous specimen descriptions and cladistic analyses are based on partial skulls and composite specimens, which places Pentaceratops as an intermediate form between Chasmosaurus and Triceratops.
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Canadian Journal of Earth Sciences, 2015
Judiceratops tigris is a recently described ceratopsid, collected from sediments of the Upper Cretaceous (middle Campanian) Judith River Formation (JRF) of northern Montana, USA. The current diagnosis for this taxon is tentative, as it is based on four fragmentary cranial specimens that have limited anatomical overlap.
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Judiceratops tigris is a recently described ceratopsid, collected from sediments of the Upper Cretaceous (middle Campanian) Judith River Formation (JRF) of northern Montana, USA. The current diagnosis for this taxon is tentative, as it is based on four fragmentary cranial specimens that have limited anatomical overlap.
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Canadian Journal of Earth Sciences
Late Campanian terrestrial communities of western Canada are best known from the fluvial–paralic deposits of the Dinosaur Park Formation (DPF) in Dinosaur Provincial Park (DPP), Alberta. However, a growing list of localities from isolated DPF outcrops, outside of the DPP area, offers a glimpse into palaeocommunities that evolved isochronously with DPP
Alexandre V. Demers-Potvin +1 more
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Late Campanian terrestrial communities of western Canada are best known from the fluvial–paralic deposits of the Dinosaur Park Formation (DPF) in Dinosaur Provincial Park (DPP), Alberta. However, a growing list of localities from isolated DPF outcrops, outside of the DPP area, offers a glimpse into palaeocommunities that evolved isochronously with DPP
Alexandre V. Demers-Potvin +1 more
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