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Redescription of Elasmosaurus platyurus Cope 1868 (Plesiosauria: Elasmosauridae) from the Upper Cretaceous (lower Campanian) of Kansas, USA
The type specimen of Elasmosaurus platyurus Cope, 1868 from the Upper Cretaceous (lower Campanian) of Kansas, U.S.A. is redescribed. It consists of part of the skull (e. g., both premaxillae, parts…
Postcranium of the paradigm elasmosaurid plesiosaurian Libonectes morgani (Welles, 1949)
An examination of character scores used in published plesiosaurian phylogenies concurred with an examination of postcranial elements of Libonectes morgani first-hand, and highlights the persistent significance of post cadaveral elements for discriminating elasmosaurid taxa.
Big-headed marine crocodyliforms and why we must be cautious when using extant species as body length proxies for long-extinct relatives
Examination and regression analyses of the best preserved teleosaurid skeletons demonstrates that they were smaller than previously thought, with no known specimen exceeding 7.2 m in length; and that they had proportionally large skulls, and proportionally short femora, when compared to body length.
Redescription of the elasmosaurid plesiosaurian Libonectes atlasense from the Upper Cretaceous of Morocco
Reappraisal of Europe’s most complete Early Cretaceous plesiosaurian: Brancasaurus brancai Wegner, 1914 from the “Wealden facies” of Germany
A comprehensive examination of the holotype as it is now preserved, and also assessed other Bückeberg Group plesiosaurian fossils to establish a morphological hypodigm, concludes that these monotypic individuals are ontogenetic morphs and G. wegneri is a junior synonym of B. brancai.
A New Basal Elasmosaurid (Sauropterygia: Plesiosauria) from the Lower Cretaceous of Germany
ABSTRACT Here we report on a new basal elasmosaurid plesiosaurian, Lagenanectes richterae, gen. et sp. nov., from the Lower Cretaceous (probably Upper Hauterivian) of Germany. The material includes…
Revised Vertebral Count in the “Longest-Necked Vertebrate” Elasmosaurus platyurus Cope 1868, and Clarification of the Cervical-Dorsal Transition in Plesiosauria
The holotype of E. platyurus is reassessed as a model for standardizing the debated cervical-dorsal transition in plesiosaurians, and during this procedure, a “lost” cervical centrum is documented.
Redescription of Woolungasaurus glendowerensis (Plesiosauria: Elasmosauridae) from the Lower Cretaceous of northeast Queensland
- S. Sachs
- Environmental Science
Following comparisons with specimens referable to all valid genera of the Elasmosauridae, this specimen and additional material is identified as belonging to Styxosaurus.
An ichthyosaur fragment from the Cretaceous of Northland, New Zealand
Abstract The rostrum fragment of an ichthyosaur from Northland in New Zealand is described. The specimen appears to belong to the genus Platypterygius. It is the first Mesozoic marine vertebrate…
TUARANGISAURUS AUSTRALIS SP. NOV. (PLESIOSAURIA: ELASMOSAURIDAE) FROM THE LOWER CRETACEOUS OF NORTHEASTERN QUEENSLAND, WITH ADDITIONAL NOTES ON THE PHYLOGENY OF THE ELASMOSAURIDAE
- S. Sachs
The skull and associate cervical vertebrae of an elasmosaur from the Lower Cretaceous of northeastern Queensland are described as a new species of Tuarangisaurus, Tuarangisaurus australis. They…