Hanssuesia Facts
Pronunciation: HAHN-soo-eh-see-ah
Name meaning: Named after Hans-Dieter Sues, a palaeontologist
| Diet | Herbivore |
| Height | 1m |
| Length | 2m |
| Weight | 15 kg |
| Environment | Land |
| Era | Cretaceous |
| Period | Late Cretaceous |
| Type | Pachycephalosaur |
| Location | North America |
Hanssuesia was a small pachycephalosaur dinosaur that lived during the Late Cretaceous period, around 72 to 66 million years ago. This bipedal herbivore roamed the ancient landscapes of what is now Alberta, Canada and Montana, USA, making it one of the last dinosaurs to exist before the mass extinction event.
Unlike its more famous thick-skulled relatives, Hanssuesia had a relatively flat skull roof with only modest thickening. This pachycephalosaur stood about 1 metre tall at the hip and measured approximately 2 metres in length, making it quite small compared to other members of its group. Its body was built for swift movement on two legs, with strong hind limbs and a long tail for balance.
As a herbivore, Hanssuesia fed on the abundant plant life of the Late Cretaceous, including ferns, cycads, and early flowering plants. Its teeth were well-suited for processing tough vegetation, with sharp edges for cutting and grinding plant material. The dinosaur likely lived in small groups, foraging in the lush forests and open woodlands of ancient North America.
What makes Hanssuesia particularly interesting to palaeontologists is its flat skull structure, which suggests that not all pachycephalosaurs used their heads for dramatic head-butting contests as previously thought. Instead, this dinosaur may have relied more on speed and agility to avoid predators in its ecosystem.
What made Hanssuesia distinctive?
Hanssuesia had a notably flat skull roof with only modest thickening, unlike many other pachycephalosaurs with their characteristic dome-shaped heads. It was also quite small for a pachycephalosaur, with a relatively slender build adapted for swift bipedal movement.
Behaviour
Hanssuesia likely lived in small herds and relied on speed and agility rather than head-butting to avoid predators. Its flat skull suggests it may have engaged in different social behaviours compared to dome-headed pachycephalosaurs, possibly using visual displays or other forms of communication instead of physical head-to-head combat.
Discovery
Hanssuesia was first described by Robert Sullivan in 1979. The original fossils were discovered at Alberta, Canada and Montana, USA.
Hanssuesia FAQ
What did Hanssuesia eat?
Hanssuesia was a herbivore that fed on
Late Cretaceous plants including ferns, cycads, and early flowering plants. Its teeth were adapted for cutting and grinding tough vegetation, allowing it to process the fibrous plant material that made up its diet.
How big was Hanssuesia?
Hanssuesia was quite small for a pachycephalosaur, standing about 1 metre tall at the hip and measuring approximately 2 metres in total length. It weighed around 15 kilograms, making it a relatively lightweight and agile dinosaur.
When did Hanssuesia live?
Hanssuesia lived during the
Late Cretaceous period, approximately 72 to 66 million years ago. This means it was one of the last dinosaurs to exist before the mass extinction event that ended the age of dinosaurs.
Where was Hanssuesia found?
Fossils of Hanssuesia have been discovered in
Late Cretaceous rock formations in both Alberta, Canada and Montana, USA. This shows that the dinosaur had a fairly wide distribution across western North America during its time.
How do you pronounce Hanssuesia?
Hanssuesia is pronounced 'HAHN-soo-eh-see-ah'. The name can be broken down into syllables as Hans-sue-sia, with emphasis on the first syllable.
What does Hanssuesia mean?
Hanssuesia is named in honour of Hans-Dieter Sues, a distinguished German-American palaeontologist who has made important contributions to our understanding of dinosaurs and other prehistoric reptiles.
How fast could Hanssuesia run?
The exact running speed of Hanssuesia is unknown, but its lightweight build and long legs suggest it was built for swift movement. It likely relied on speed and agility to escape from predators rather than fighting or defensive displays.
What type of dinosaur was Hanssuesia?
Hanssuesia was a pachycephalosaur, belonging to the family Pachycephalosauridae. These were herbivorous dinosaurs known for their thickened skull roofs, though Hanssuesia had a relatively flat skull compared to its dome-headed relatives.
Was Hanssuesia related to birds?
As an ornithischian dinosaur, Hanssuesia was not directly related to modern birds. Birds evolved from theropod dinosaurs, which were part of the other major dinosaur group called saurischians. However, all dinosaurs share common ancestry as archosaurs.
How many Hanssuesia fossils have been found?
Hanssuesia is known from limited fossil material, primarily skull fragments and some postcranial bones. The relatively small number of specimens means that some aspects of its biology and behaviour are still being studied and understood by palaeontologists.
