About a month ago John Scannella and Jack Horner published an article "Torosaurus Marsh, 1891, is Triceratops Marsh, 1889 (Ceratopsidae: Chasmosaurinae): synonymy through ontogeny" in the
Journal of Paleontology*
*Note. Ceratopsidae are the "horned dinosaurs", including Styracosaurus, Triceratops/Torosaurus, Chasmosaurus, and Pachyrhinosaurus to
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