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MEET TRICERATOPS Discovery and name The name Triceratops means ‘three-horned face’ in Greek. The first finds of Triceratops were an isolated pair of horns, initially thought to belong to an ancient bison. Triceratops was named by the famous palaeontologist Othneil Charles Marsh in 1889. Lived where and when? Triceratops lived in the Late Cretaceous (approximately 68-65 million years ago) in North America. Numerous Triceratops bones have been collected from Alberta, Saskatewan, Montana, North Dakota, South Dakota, Wyoming, and Colorado. Size and growth Adult Triceratops were amongst the largest member of the Family Ceratopsidae, measuring up to nine metres long, three metres high and weighing as much as six tonnes. While many different species of Triceratops were once recognized, it is now thought that there were only two. All other distinctions between specimens are attributed to individual variation and different growth stages. It has recently been suggested that another frilled dinosaur Torosaurus may actually represent large, adult forms of Triceratops. This may be supported by the abundance of semi-adult Triceratops known from fossil sites, and the lack of known, fully mature specimens. Diet It is thought the relatively short height of Triceratops restricted it to browsing on low-lying plants, such as cycads, palms and ferns. While the front of the mouth was covered with a keratinous, parrot-like beak for plucking plant material, the back of the jaws were lined with batteries of hundreds of teeth. The teeth in these batteries were replaced continuously throughout life and were suited for shearing instead of grinding or crushing. Frill and horns The horns of Triceratops were probably covered in tough keratin, which increased length and strength. Wounds have been found on the face, frills and horns of several Triceratops specimens. These injuries correspond in dimension to the horns of other Triceratops, suggesting individuals fought over territory or mates. The relatively thick frill of Triceratops also protected the neck from rivals and predators. Palaeontologists have also suggested that the frill of Triceratops may have been colourful and used for display. Such displays could help identify individuals, attract mates or warn off potential threats. 1/…1 .

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