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Phylogeny of the Ichthyopterygia
ABSTRACT A phylogenetic hypothesis for ichthyopterygians is proposed, based on a cladistic analysis of 105 discrete osteological characters coded for 27 ingroup and five outgroup taxa. The monophylyExpand
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ON THE EVOLUTION AND HOMOLOGIES OF ICHTHYOPTERYGIAN FOREFINS
ABSTRACT The evolution of forefins within the Ichthyopterygia is re-evaluated based on the largest set of data available up to present, including recently reported Early Triassic forms. Three humeralExpand
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Evolution of Fish-Shaped Reptiles (reptilia: Ichthyopterygia) in Their Physical Environments and Constraints
▪ Abstract Ichthyosaurs were a group of Mesozoic marine reptiles that evolved fish-shaped body outlines. They are unique in several anatomical characters, including the possession of enormousExpand
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New technique for retrodeforming tectonically deformed fossils, with an example for ichthyosaurian specimens
A new technique is devised with which to retrodeform two-dimensional images of tectonically deformed fossils. As opposed to traditional methods, by which the strain ellipse is found directly, withExpand
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Skull of Grippia Longirostris: no contradiction with a diapsid affinity for the Ichthyopterygia
The skull of Grippia longirostris, one of the basal ichthyopterygians, is redescribed, based on a newly prepared referred specimen and the examination of others. Grippia had been considered to be theExpand
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Nocturnality in Dinosaurs Inferred from Scleral Ring and Orbit Morphology
Comparison of eye structures between fossils and modern species suggests that Mesozoic archosaurs were active day and night. Variation in daily activity patterns facilitates temporal partitioning ofExpand
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A basal ichthyosauriform with a short snout from the Lower Triassic of China
The incompleteness of the fossil record obscures the origin of many of the more derived clades of vertebrates. One such group is the Ichthyopterygia, a clade of obligatory marine reptiles thatExpand
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Ichthyosaurian relationships illuminated by new primitive skeletons from Japan
The Ichthyosauria is a group of reptiles with fish-shaped bodies from the Mesozoic (65–250 million years ago),. Their secondary adaptations to aquatic life have obscured their ancestral features,,Expand
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Estimating body mass from silhouettes: testing the assumption of elliptical body cross-sections
Abstract In computational studies of the body mass and surface area of vertebrates, it is customary to assume that body cross-sections are approximately elliptical. However, a review of actualExpand
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Phylogeny of the Ichthyopterygia Incorporating Recent Discoveries from South China
ABSTRACT During the last decade, abundant ichthyopterygian material has been found from the Triassic of South China as well as the Upper Jurassic and Lower Cretaceous of Europe and South America,Expand
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