English: Size comparsion of the North American brachauchenine pliosaurid plesiosaur Brachauchenius lucasi, based on USNM 4989. Unknown regions were filled in with other Brachauchenius specimens, Megacephalosaurus, Kronosaurus, and estimates by McHenry. The diver silhoutte from File:Scuba33.jpg, which is by NOAA and in the public domain.

• Williston, Samuel W. (1907). "The skull of Brachauchenius, with observations on the relationships of the plesiosaurs". Proceedings of the United States National Museum 32: 477-489.
• McHenry, Colin R. (2009) Devourer of Gods: The palaeoecology of the Cretaceous pliosaur Kronosaurus queenslandicus (Thesis)^[1], The University of Newcastle
• Schumacher, Bruce A.; Carpenter, Kenneth; Everhart, Michael J. (2013). "A new Cretaceous pliosaurid (Reptilia, Plesiosauria) from the Carlile Shale (middle Turonian) of Russell County, Kansas". Journal of Vertebrate Paleontology 33 (3): 613-628.
• Photograph of the Harvard Mount
• Reconstructed Megacephalosaurus skull