Triceratops horn

Triceratops which lived during the Upper Cretaceous period, 67 to 65 million years ago had three horns. It grew up to 9 metres in length and fossils have been discovered in USA. First described by Marsh, 1889

Archosaur Archosauria Archosauriformes Archosauromorpha Cerapoda Ceratopia Ceratopian Ceratopid Ceratopidae Ceratopsia Ceratopsian Ceratopsid Ceratopsidae Chasmosaurinae Diapsid Diapsida Dinosauria Dinosauromorpha Genasauria Neoceratopia Neoceratopsia Ornithischia Ornithischian Phanerozoic Prehistory Reptilia Studioshot Triceratops Triceratopsini U.s.a

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