There has been a recent claim that ''Torosaurus'' may be ''Triceratops'', albeit fully mature. According to the ''Journal of Vertebrate Paleontology''<ref>http://www.cbsnews.com/8301-501465_162-20012471-501465.html</ref><ref>http://www.vertpaleo.org/publications/index.cfm</ref>, scientists theorize that ceratopsian dinosaurs, like all reptiles, continued to grow with age; this growth included changes to the frill which - according to the theory - changed from the deeply-curved solid bone of ''Tricertops'' into the "straight-backed" frill of ''Torosaurus'', a change of which also involved a ''loss'' of bone creating the ''fenestræ'' as a result. According to Dr. Jack Horner, this process involved "metaplastic" bone which caused a change in the shape of the skull as the animal aged, i.e the backward pointing horns of a baby ''Triceratops'' turning into the forward pointing horns of an adult.<ref>http://www.sciencedaily.com/releases/2009/10/091031002314.htm</ref> | There has been a recent claim that ''Torosaurus'' may be ''Triceratops'', albeit fully mature. According to the ''Journal of Vertebrate Paleontology''<ref>http://www.cbsnews.com/8301-501465_162-20012471-501465.html</ref><ref>http://www.vertpaleo.org/publications/index.cfm</ref>, scientists theorize that ceratopsian dinosaurs, like all reptiles, continued to grow with age; this growth included changes to the frill which - according to the theory - changed from the deeply-curved solid bone of ''Tricertops'' into the "straight-backed" frill of ''Torosaurus'', a change of which also involved a ''loss'' of bone creating the ''fenestræ'' as a result. According to Dr. Jack Horner, this process involved "metaplastic" bone which caused a change in the shape of the skull as the animal aged, i.e the backward pointing horns of a baby ''Triceratops'' turning into the forward pointing horns of an adult.<ref>http://www.sciencedaily.com/releases/2009/10/091031002314.htm</ref> |