The fossils only consisted of fragmentary horn cores, 3 dorsal vertebrae, and fragmentary limb elements.

Theropods from these formations include genera of dromaeosaurids, tyrannosaurids, ornithomimids, troodontids, [93] avialans, [95] and caenagnathids. However, we do know that they likely battled amongst one another, as fossils with injuries from other Triceratops have been found.

The 'species recognition hypothesis' does not explain the presence and evolution of exaggerated structures in non-avialan dinosaurs". A partial Triceratops fossil collected in 1997 has a horn that was bitten off, with bite marks that match Tyrannosaurus. A New Large-Bodied Oviraptorosaurian Theropod Dinosaur from the Latest Cretaceous of Western North America". The cladogram below follows Longrich (2014), who named a new species of Pentaceratops, and included nearly all species of chasmosaurine.

As the archetypal ceratopsian, Triceratops is one of the most beloved, popular dinosaurs and has been featured in numerous films, postage stamps, and many other types of media. eurycephalus ('the wide-headed') and suggesting that it linked the second and third lineages closer together than they were to the T.Significant variety is seen even in those skulls already identified as Triceratops, Horner said, "where the horn orientation is backwards in juveniles and forward in adults".

A similar theory has been proposed regarding the plates of Stegosaurus, [80] although this use alone would not account for the bizarre and extravagant variation seen in different members of Ceratopsidae, which would rather support the sexual display theory.It lived about 65 million years ago and had three horns on the face, hence the name “Triceratops,” which means “three-horned face. In those two groups, the forelimbs of quadrupedal species were usually rotated so that the hands faced forward with palms backward ("pronated") as the animals walked. His boss was rancher and avid fossil collector Charles Arthur Guernsey, who just so happened to show it to Hatcher. D’Anastasio, Ruggero; Cilli, Jacopo; Bacchia, Flavio; Fanti, Federico; Gobbo, Giacomo; Capasso, Luigi (April 7, 2022).