Agathaumas
Herbivore·Late Cretaceous·Wyoming, USA·Quadrupedal
Agathaumas was a large ceratopsid dinosaur that lived in Wyoming during the Late Cretaceous period, approximately 66 million years ago. Named for its immense size, it was considered the largest land animal known at the time of its discovery. However, due to the fragmentary nature of its fossil remains, which consist mainly of hip bones, vertebrae, and ribs, Agathaumas is considered a dubious genus and is provisionally classified as a synonym of Triceratops or Torosaurus.
Key Facts
- ›Agathaumas means "great wonder" in Ancient Greek.
- ›It was the first ceratopsian known from more than just teeth.
- ›Fossils were discovered in Wyoming's Lance Formation.
- ›The original specimen included hip bones, vertebrae, and ribs.
- ›It is considered a dubious taxon due to fragmentary remains.
- ›It is provisionally considered a synonym of Triceratops or Torosaurus.
- Large ceratopsid dinosaur.
- Considered the largest land animal known at the time of its discovery.
- Known from postcranial remains.
Triceratops, Torosaurus, Monoclonius, Polyonax
North America
About Agathaumas
Agathaumas, a name derived from the Greek words for "great wonder," is a genus of large ceratopsid dinosaur that roamed the Earth during the Late Cretaceous period, specifically the late Maastrichtian stage, approximately 66 million years ago. The fossilized remains of Agathaumas were discovered in southwestern Wyoming, USA, within the Lance Formation. At the time of its discovery, it was considered the largest land animal known to science.
History and Discovery
The holotype specimen of Agathaumas was unearthed in 1872 by Fielding Bradford Meek and Henry Martyn Bannister. They found hip bones, vertebrae, and ribs. Paleontologist Edward Drinker Cope was notified of the find and later searched the same area, uncovering more of the massive bones. These fossils were preserved in sediments that also contained fossilized plant material, suggesting a heavily forested habitat. Cope described the skeleton in 1873, noting its immense size and the environment indicated by the surrounding rock.
Classification and Significance
Agathaumas holds historical significance as one of the first ceratopsian dinosaurs known from more than just teeth. However, because the fossil remains are postcranial (meaning they are from parts of the body other than the skull), which tend to be similar across many ceratopsid species, Agathaumas is generally considered a dubious taxon. Paleontologists have had difficulty comparing it definitively to other well-known ceratopsids. It is provisionally regarded as a synonym of either Triceratops or Torosaurus. Over time, various species were referred to Agathaumas, but most have since been reassigned or deemed dubious themselves.
Physical Characteristics and Habitat
While specific details are limited due to the nature of the fossils, Agathaumas was a large, quadrupedal, herbivorous dinosaur characteristic of the ceratopsid family. The discovery site, with its abundance of fossilized plant material, points to a habitat rich in vegetation, likely a forest environment that could support such a large creature.
Source: Wikipedia ↗
Frequently Asked Questions
What does the name Agathaumas mean?
The name Agathaumas comes from Ancient Greek words: 'agan' meaning 'much' and 'thauma' meaning 'wonder'. This name was chosen to reflect the immense size of the dinosaur, which was considered the largest land animal known at the time of its discovery.
Where were the fossils of Agathaumas found?
The holotype remains of Agathaumas were discovered in southwestern Wyoming, specifically in the Lance Formation near Black Butte and Bitter Creek. These discoveries were made during expeditions by Fielding Bradford Meek and Henry Martyn Bannister.
What kind of dinosaur was Agathaumas?
Agathaumas was a large ceratopsid dinosaur, belonging to the group of horned dinosaurs. While initially its classification was uncertain, it is now provisionally considered a member of the Triceratopsini tribe.
Why is Agathaumas considered a dubious genus?
Agathaumas is considered a dubious genus because the original fossil specimen is very fragmentary, consisting only of hip bones, vertebrae, and ribs. These postcranial remains do not vary significantly between different ceratopsid species, making it difficult to definitively distinguish Agathaumas from other related dinosaurs like Triceratops or Torosaurus.
What was the habitat of Agathaumas?
The fossilized sediments containing Agathaumas remains were packed with fossil sticks and leaves, indicating that the dinosaur inhabited a heavily forested environment. This rich plant life would have provided ample food for herbivorous dinosaurs.
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