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Pachyrhinosaurus in a Rocky Conifer Grove

A massive Pachyrhinosaurus with a broad nasal boss stands near a rocky grove of conifer trees.

A massive Pachyrhinosaurus with a broad, bumpy boss on its nose standing near a conifer grove.
Pachyrhinosaurus in a Rocky Conifer Grove
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Pachyrhinosaurus in a rocky conifer grove

This heavy-bodied horned dinosaur is distinguished by the thick, bumpy mass of bone on its snout. Called a nasal boss, that feature occupied the place where a prominent nose horn appears in some of its relatives. Rocks and conifers establish the surrounding grove, while the dinosaur’s broad skull and sturdy build remain the central features of the scene.

A social herbivore of northern lands

Pachyrhinosaurus fossils have been found in North America, including regions that lay far north during the Late Cretaceous. Large collections of bones found together suggest that these plant eaters may sometimes have traveled in herds. Conifers were important parts of many prehistoric forests and reproduce with cones rather than flowers.

Natural colors of Pachyrhinosaurus and the grove

  • Pachyrhinosaurus skin: the exact color and markings are unknown
  • Nasal boss: its surface may have supported a keratin covering, but its living shade has not been established
  • Frill: no surviving pigment evidence reveals its original color or pattern
  • Conifer needles: usually green, deep green, or blue-green while healthy
  • Grove rocks: naturally gray, brown, tan, reddish, or nearly black according to their minerals
Questions and answers

Questions and answers

Did Pachyrhinosaurus have a large horn on its nose?
Instead of a long nasal horn, it had a broad, thickened bony boss. Smaller projections and ornaments also occurred around its skull and frill.
What did Pachyrhinosaurus eat?
It was an herbivore with a beak for cropping vegetation. Its teeth were arranged for slicing and processing tough plant material.
Why do scientists think it may have lived in groups?
Some fossil sites contain remains from many individuals of different ages. Such bone beds can indicate herd behavior, although floods or other events may also have gathered remains together.
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