This mentioned taxonomy is an attempt to make an conclusive assignment from the different classifications of various scientists. Because the taxonomy may change due to the latest investigative methods and other findings, our map is a guide only.
D. J. Serratos, 2017 - A new elasmosaurid (Sauropterygia, Plesiosauria) from the Bearpaw Shale (Late Cretaceous, Maastrichtian) of Montana demonstrates multiple evolutionary reductions of neck length within Elasmosauridae - Journal of Vertebrate Paleontology (37), e1278- (journal article, English)
R. A. Otero, 2016 - Taxonomic reassessment of Hydralmosaurus as Styxosaurus: new insights on the elasmosaurid neck evolution throughout the Cretaceous - PeerJ (4), e1777-60 (journal article, English)
T. Kubo, 2012 - Albertonectes vanderveldei, a new elasmosaur (Reptilia, Sauropterygia) from the Upper Cretaceous of Alberta - Journal of Vertebrate Paleontology (32), 557-572 (journal article, English)
S. Sachs, 2005 - Redescription of Elasmosaurus platyurus Cope 1868 (Plesiosauria: Elasmosauridae) from the Upper Cretaceous (Lower Campanian) of Kansas, U.S.A. - Paludicola (5), 92-106 (journal article, English)
T. Sato, 2003 - Terminonatator ponteixensis, a new elasmosaur (Reptilia: Sauropterygia) from the Upper Cretaceous of Saskatchewan - Journal of Vertebrate Paleontology (23), 89-103 (journal article, English)
F. R. O'Keefe, 2001 - A cladistic analysis and taxonomic revision of the Plesiosauria (Reptilia: Sauropterygia) - Acta Zoologica Fennica (213), 1-63 (journal article, English)
K. Carpenter, 1999 - Revision of North American elasmosaurs from the Cretaceous of the Western Interior - Paludicola (2), 148-173 (journal article, English)
G. W. Storrs, 1999 - An examination of Plesiosauria (Diapsida: Sauropterygia) from the Niobrara Chalk (Upper Cretaceous) of Central North America - Paleontological Contributions of the University of Kansas (11), 1-15 (journal article, English)
S. P. Welles, 1949 - Alzadasaurus pembertoni, a new elasmosaur from the Upper Cretaceous of South Dakota - Journal of Paleontology (23), 521-535 (journal article, English)
S. P. Welles, 1943 - Elasmosaurid plesiosaurs with description of new material from California and Colorado - Memoirs of the University of California (13), 125-254 (journal article, English)
S. P. Welles, 1940 - - Revision of Elasmosaurid Plesiosaurs (), 1-78 (Ph.D. thesis, English)
O. P. Hay, 1930 - - Second Bibliography and Catalogue of the Fossil Vertebrata of North America (390), 1-1074 (book, English)
S. W. Williston, 1906 - North American plesiosaurs: Elasmosaurus, Cimoliasaurus, and Polycotylus - The American Journal of Science, series 4 (21), 221-236 (journal article, English)
S. W. Williston, 1890 - Structure of the plesiosaurian skull - Science (16), 262- (journal article, English)
E. D. Cope, 1877 - Report on the geology of the region of the Judith River, Montana, and on vertebrate fossils obtained on or near the Missouri River - Bulletin of the United States Geological and Geographical Survey (3), 565-597 (serial monograph, English)
E. D. Cope, 1868 - On a new large enaliosaur - The American Journal of Science, series 2 (46), 263-264 (journal article, English)