File:Elasmosaurus Size.svg

English: Size comparison of the North American Upper Cretaceous elasmosaurid plesiosaur Elasmosaurus platyurus. Unknown regions have been restored after Albertonectes and Styxosaurus. The diver silhoutte from File:Scuba33.jpg, which is by NOAA and in the public domain.

References

• Cope, E. D. (1871年) Synopsis of the extinct Batrachia, Reptilia and Aves of North America、Philadelphia, Pennsylvania: American Philosophical Society
• O'Gorman, J. P. (2016). "A small body sized non-aristonectine elasmosaurid (Sauropterygia, Plesiosauria) from the Late Cretaceous of Patagonia with comments on the relationships of the Patagonian and Antarctic elasmosaurids". Ameghiniana 53 (3): 245-269.
• Kubo, T.; Mitchell, M. T.; Henderson, D. M. (2012). "Albertonectes vanderveldei, a new elasmosaur (Reptilia, Sauropterygia) from the Upper Cretaceous of Alberta". Journal of Vertebrate Paleontology 32 (3): 557-572.
• Otero, Rodrigo A. (2016). "Taxonomic reassessment of Hydralmosaurus as Styxosaurus: new insights on the elasmosaurid neck evolution throughout the Cretaceous". PeerJ 4: e1777. DOI:10.7717/peerj.1777.