A New Elasmosaurid (Sauropterygia, Plesiosauria) from the Bearpaw Shale (Late Cretaceous, Maastrichtian) of Montana Demonstrates Multiple Evolutionary Reductions of Neck Length Within Elasmosauridae
@article{Serratos2017ANE, title={A New Elasmosaurid (Sauropterygia, Plesiosauria) from the Bearpaw Shale (Late Cretaceous, Maastrichtian) of Montana Demonstrates Multiple Evolutionary Reductions of Neck Length Within Elasmosauridae}, author={Danielle J. Serratos and Patrick S. Druckenmiller and Roger B. J. Benson}, journal={Journal of Vertebrate Paleontology}, year={2017}, volume={37} }
ABSTRACT
Plesiosauria is a diverse clade of marine reptiles that have been studied since the early 19th century. However, phylogenetic relationships within the group have been contentious due to limited taxon sampling and a misunderstanding of how ontogeny and interspecific and intraspecific variation affect character states. This is particularly true for elasmosaurids, a Cretaceous clade of long-necked plesiosaurians. In 2010, a new, nearly complete skeleton, MOR 3072, was collected from the…
35 Citations
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A new elasmosaurid is described from the upper Hauterivian (Lower Cretaceous) of Ulyanovsk (European Russia) and its shape suggests multiple episodes of elongation and shortening, however, the precise patterns are obscured by an unstable phylogenetic signal.
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ABSTRACT
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