A plesiosaur containing an ichthyosaur embryo as stomach contents from the Sundance Formation of the Bighorn Basin, Wyoming [PDF]
, 2009 Herein we report the discovery of an ichthyosaur embryo from the Upper Member of the Sundance Formation (Oxfordian) of the Bighorn Basin, Wyoming. The specimen is the first known ichthyosaur embryo from the Upper Jurassic, and is the first Jurassic ...
Andrews C. W. +22 more
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A basal elasmosaurid plesiosaur from the upper Albian– lower Cenomanian? Cambridge Greensand
Acta Palaeontologica PolonicaAn historical indeterminate elasmosaurid specimen CAMSM X50356 (CAMSM = Sedgwick Museum) collected during the 19th century is described. The specimen comes from the Cenomanian Cambridge Greensand although the possibility of an Albian–lower Cenomanian age
Jose P. O’Gorman, Roger B.J. Benson
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Ameghiniana, 2016 Abstract. New observations on the holotype of the Maastrichtian aristonectine elasmosaurid Aristonectes parvidens Cabrera from Chubut Province, Argentina, reveals features that were not previously described while resulting in new interpretations. Quantitative comparison with non-aristonectine elasmosaurids demonstrates that the increase in the number ...
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DiversityElasmosaurids comprise some of the most extreme morphotypes of plesiosaurs. Thus, the study of their neck and vertebrae elongation patterns plays a crucial role in understanding the anatomy of elasmosaurids.
José Patricio O’Gorman
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A new skeleton of the cryptoclidid plesiosaur Tatenectes laramiensis reveals a novel body shape among plesiosaurs [PDF]
, 2011 Current knowledge of plesiosaurs of clade Cryptoclidia is constrained by a lack of fossils from outside the Oxford Clay deposits of England. Recent fieldwork in the Sundance Formation of the Bighorn Basin, Wyoming, has resulted in the recovery of ...
O’Keefe, F. Robin +4 more
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Morphologic and Ontogenetic Patterns in Elasmosaur Neck Length, with Comments on the Taxonomic Utility of Neck Length Variables [PDF]
, 2006 Elasmosaur cervical vertebrae are common fossils, but their taxonomic utility is limited due to a lack of understanding concerning their shape within and among taxa.
Hiller, Norton, O’Keefe, F. Robin
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The first non-aristonectine elasmosaurid (Sauropterygia; Plesiosauria) cranial material from Antarctica : New data on the evolution of the elasmosaurid basicranium and palate [PDF]
, 2020 Elasmosaurids are a monophyletic group of cosmopolitan plesiosaurs with extremely long necks. Although abundant elasmosaurid material has been collected from the Upper Cretaceous of Antarctica, skull material is extremely rare.
Cardenas, Magali +5 more
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, 2019 Published as part of Sassoon, Judyth, 2019, Congenital and late onset vertebral fusions in long necked plesiosaurs: The first report of spondylosis deformans in Sauropterygians, pp. 1-15 in Palaeontologia Electronica (1 A) (1 A) 22 (1) on pages 4-6, DOI: 10.26879/913, http://zenodo.org/record ...
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Andean Geology, 2009 New remains of plesiosaurs (Diapsida; Sauropterygia) found in a transported block correlated with upper levels of the Dorotea Formation, Late Cretaceous (Maastrichtian) are describedherein.
Rodrigo A Otero +2 more
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Ecological Controls on the Campanian Distribution of Hesperornis (Aves: Hesperornithiformes) in the Western Interior Seaway [PDF]
, 2021 The epicontinental Western Interior Seaway (WIS) of Late Cretaceous North America provided a unique marine habitat for cephalopods, fish, marine reptiles, and the foot-propelled diving seabird Hesperornis.
Chapman, Blake
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