Results 141 to 150 of about 503 (168)
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The evolution of plesiosaur and pliosaur morphotypes in the Plesiosauria (Reptilia: Sauropterygia)
Paleobiology, 2002The dichotomy between short-necked, large-headed “pliosaurs” and long-necked, small-headed “plesiosaurs” has formed the basis of plesiosaur taxonomy for over one hundred years. Recent work has cast doubt on the taxonomic validity of this dichotomy, suggesting that the pliosaur morphotype may have evolved independently in more than one clade. This paper
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The nature ofMauisaurus haastiHector, 1874 (Reptilia: Plesiosauria)
Journal of Vertebrate Paleontology, 2005ABSTRACT A newly prepared elasmosaurid plesiosaur specimen, from the Haumurian (Upper Cretaceous) Conway Formation of North Canterbury, is more complete than any found previously in New Zealand. The specimen, a young adult, comprises posterior fragments of the skull, almost the entire vertebral column, fragments of the major bones of both pectoral and ...
Norton Hiller +3 more
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Cretaceous Research, 2003
Abstract The fragmentary remains of a plesiosaur have been collected from the Haida Formation (Albian, Lower Cretaceous) at Cumshewa Inlet, Queen Charlotte Islands, British Columbia. The specimen is identified as a member of the family Pliosauridae, based on tooth structure.
James W. Haggart +2 more
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Abstract The fragmentary remains of a plesiosaur have been collected from the Haida Formation (Albian, Lower Cretaceous) at Cumshewa Inlet, Queen Charlotte Islands, British Columbia. The specimen is identified as a member of the family Pliosauridae, based on tooth structure.
James W. Haggart +2 more
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Zootaxa, 2008
Leptocleidus Andrews, 1922 is a poorly known plesiosaur genus from Lower Cretaceous successions of the UK, South Africa, and Australia. Historically, there has been little consensus regarding its phylogenetic position within Plesiosauria, largely because of its seemingly aberrant combination of a relatively small skull and short neck.
Druckenmiller, Patrick S. +1 more
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Leptocleidus Andrews, 1922 is a poorly known plesiosaur genus from Lower Cretaceous successions of the UK, South Africa, and Australia. Historically, there has been little consensus regarding its phylogenetic position within Plesiosauria, largely because of its seemingly aberrant combination of a relatively small skull and short neck.
Druckenmiller, Patrick S. +1 more
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Ontogenetic evolution of bone structurein Late Cretaceous Plesiosauria from New Zealand
Geobios, 1995Abstract Histological observations of homologous bones (vertebrae, ribs, humerus, phalanges) among conspecific juvenileand adult Upper Cretaceous plesiosaurs from New Zealand (elasmosaurs and pliosaurs) demonstrates a unique “ontogenetic trajectory” of skeletal histogenesis in these animals.
Joan Wiffen +3 more
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Journal of Paleontology, 2014
Plesiosaurs and mosasaurs are identified from the Puskwaskau Formation of west-central Alberta, Canada. These deposits record the final stages during which the Western Interior Seaway remained open to the Boreal Sea to the North and therefore are important for determining the ranges of high-latitude marine reptiles.
Bell P. +3 more
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Plesiosaurs and mosasaurs are identified from the Puskwaskau Formation of west-central Alberta, Canada. These deposits record the final stages during which the Western Interior Seaway remained open to the Boreal Sea to the North and therefore are important for determining the ranges of high-latitude marine reptiles.
Bell P. +3 more
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The Science of Nature, 2019
This paper offers a re-description of one of the oldest (Lower Hettangian, Lower Jurassic) plesiosaurians (Reptilia: Sauropterygia) from Germany and discusses its phylogenetic relevance. Lindwurmia thiuda, new genus and species, is a moderately sized plesiosaur (estimated size between 2 and 3 m long) exhibiting several plesiomorphic features.
Vincent, Peggy, Storrs, Glenn
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This paper offers a re-description of one of the oldest (Lower Hettangian, Lower Jurassic) plesiosaurians (Reptilia: Sauropterygia) from Germany and discusses its phylogenetic relevance. Lindwurmia thiuda, new genus and species, is a moderately sized plesiosaur (estimated size between 2 and 3 m long) exhibiting several plesiomorphic features.
Vincent, Peggy, Storrs, Glenn
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Philosophical Transactions of the Royal Society of London. Series B: Biological Sciences, 1994
Abstract An account is given of the skull of a large pliosauroid plesiosaur from the lowermost Hettangian (Lower Lias; Lower Jurassic) of Barrow upon Soar, Leicestershire, identified as Rhomaleosaurus megacephalus (Stutchbury, 1846). It is proposed as the neotype of the species, as the holotype was destroyed in an air-raid on Bristol ...
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Abstract An account is given of the skull of a large pliosauroid plesiosaur from the lowermost Hettangian (Lower Lias; Lower Jurassic) of Barrow upon Soar, Leicestershire, identified as Rhomaleosaurus megacephalus (Stutchbury, 1846). It is proposed as the neotype of the species, as the holotype was destroyed in an air-raid on Bristol ...
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Transactions of the Kansas Academy of Science, 2007
Pliosaurs are plesiosaurs with short necks and large heads. The Kronosaurus queenslandicus specimen from the Early Cretaceous of Australia on exhibit in the Museum of Comparative Zoology at Harvard is perhaps the best known example. Brachauchenius lucasi Williston 1903 (USNM 4989; Fig.
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Pliosaurs are plesiosaurs with short necks and large heads. The Kronosaurus queenslandicus specimen from the Early Cretaceous of Australia on exhibit in the Museum of Comparative Zoology at Harvard is perhaps the best known example. Brachauchenius lucasi Williston 1903 (USNM 4989; Fig.
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