The taxonomic and phylogenetic position of the Plesiosauroidea from the Lower Jurassic Posidonia shale of south-west Germany

被引：59
作者：
Grossmann, Franziska [1 ]
机构：
[1] Univ Tubingen, Inst Geowissensch, D-72076 Tubingen, Germany
来源：
PALAEONTOLOGY | 2007年 / 50卷
关键词：
Plesiosauria; Seeleyosaurus guilelmiimperatoris; Hydrorion brachypterygius; Lower Jurassic; Posidonia shale; phylogeny; palaeobiogeography;
D O I：
10.1111/j.1475-4983.2007.00654.x
中图分类号：
Q91 [古生物学];
学科分类号：
0709 ; 070903 ;
摘要：
The two plesiosauroid species from the Posidonia shale of Holzmaden, 'Plesiosaurus' guilelmiimperatoris and 'Plesiosaurus' brachypterygius, do not belong to Plesiosaurus but form new monotypic genera. The new genus Hydrorion is erected for 'P.' brachypterygius, and the genus Seeleyosaurus is re-established for 'P.' guilelmiimperatoris. The recently described species Plesiopterys wildii is regarded as a junior synonym of S. guilelmiimperatoris. A short phylogenetic analysis shows that S. guilelmiimperatoris and Muraenosaurus are basal elasmosaurs. H. brachypterygius, Occitanosaurus tournemirensis from France and Microcleidus homalospondylus from England form a monophyletic clade, which is the sister taxon to the Cretaceous elasmosaurs. A palaeobiogeographical comparison of plesiosaur localities in the Lower Jurassic shows distinct palaeobiogeographical zones for the Toarcian, with different plesiosaur taxa in England, Germany and France.
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页码：545 / 564
页数：20
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