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elmisaurus: omnivore dinosaur from the Cretaceous era

Elmisaurus Facts

Pronunciation: EL-mee-SORE-us

Name meaning: Foot Lizard

Diet	Omnivore
Height	0.8m
Length	2m
Weight	25 kg
Environment	Land
Era	Cretaceous
Period	Late Cretaceous
Type	Theropod
Location	Mongolia

Elmisaurus was a distinctive theropod dinosaur that lived around 72 million years ago during the Late Cretaceous period in what is now Mongolia. This relatively small dinosaur walked on two powerful legs and belonged to a group of theropods known for their unusual beaked skulls and specialised feeding habits.

Standing roughly 80 centimetres tall at the hip and measuring about 2 metres in total length, Elmisaurus was roughly the size of a large ostrich. Its most remarkable feature was its feet, which gave the dinosaur its name meaning 'foot lizard'. These feet were particularly robust and well-adapted for its lifestyle, with strong claws that could have been used for digging or grasping.

As an omnivore, Elmisaurus likely had a varied diet that included small animals, eggs, plants, and possibly shellfish. Its beak-like jaws were toothless but powerful, allowing it to crack open tough foods like nuts, seeds, and mollusc shells. This feeding strategy made it quite different from the typical meat-eating theropods of its time.

Elmisaurus lived in the diverse ecosystem of the Nemegt Formation, sharing its habitat with famous dinosaurs like Tarbosaurus and various duck-billed dinosaurs. The environment was much warmer and more humid than modern Mongolia, with rivers, forests, and floodplains providing rich feeding opportunities for this adaptable theropod.

What made Elmisaurus distinctive?

Elmisaurus had unusually robust and powerful feet with strong claws, giving it its distinctive name meaning 'foot lizard'. It possessed a toothless, beak-like skull typical of its family, and was built like a large, ground-dwelling bird with strong running legs.

Behaviour

Elmisaurus was likely an active forager that used its powerful feet and claws to dig for food, crack open shells, and grasp prey. It probably lived in small groups and was well-adapted for running across the varied terrain of Late Cretaceous Mongolia.

Fun Facts About Elmisaurus

Elmisaurus was initially known only from its distinctive foot bones, which were so unusual that scientists could identify it as a new species from these remains alone
The powerful feet of Elmisaurus may have been used like modern cassowaries use theirs - for defence, digging, and manipulating food
Elmisaurus lived alongside some of the last great dinosaurs before the mass extinction, including the massive predator Tarbosaurus
Unlike most theropods, Elmisaurus had no teeth and instead relied on its beak-like jaws to process food
The robust build of Elmisaurus suggests it was more heavily built than many of its relatives, possibly adapted for a more ground-based lifestyle

Scientific Classification

Phylum	Chordata
Class	Saurischia
Order	Avetheropoda
Family	Caenagnathidae
Genus	Elmisaurus

Discovery

Elmisaurus was first described by Halszka Osmólska in 1981. The original fossils were discovered at Nemegt Formation, Mongolia.

Elmisaurus FAQ

What did Elmisaurus eat?

Elmisaurus was an omnivore with a varied diet that likely included small animals, eggs, plants, nuts, seeds, and possibly shellfish. Its powerful, toothless beak was well-suited for cracking open tough foods and processing both plant and animal matter.

How big was Elmisaurus?

Elmisaurus was about 80 centimetres tall at the hip and roughly 2 metres long in total. It weighed approximately 25 kilograms, making it about the size of a large ostrich or emu.

When did Elmisaurus live?

Elmisaurus lived during the Late Cretaceous period, approximately 72.2 million years ago. This was near the end of the age of dinosaurs, just before the mass extinction event.

Where was Elmisaurus found?

Elmisaurus fossils were discovered in the Nemegt Formation of Mongolia. This region was much warmer and more humid during the Late Cretaceous than it is today, with rivers, forests, and floodplains.

How do you pronounce Elmisaurus?

Elmisaurus is pronounced 'EL-mee-SORE-us', with emphasis on the first syllable 'EL' and the final 'SORE' part.

What does Elmisaurus mean?

Elmisaurus means 'foot lizard' in reference to the distinctive and robust foot bones that were the first parts of this dinosaur to be discovered and studied.

How fast could Elmisaurus run?

The exact running speed of Elmisaurus is unknown, but its strong, well-built legs suggest it was capable of running quite fast when needed, likely to escape predators or chase prey.

What type of dinosaur was Elmisaurus?

Elmisaurus was a theropod dinosaur, specifically belonging to the family Caenagnathidae. These were unusual theropods that had evolved beak-like skulls and omnivorous diets rather than the typical sharp teeth of meat-eating dinosaurs.

Was Elmisaurus related to birds?

Yes, as a theropod dinosaur, Elmisaurus was part of the group that gave rise to modern birds. Its beak-like skull and bipedal stance show some bird-like characteristics, though it was not a direct ancestor of birds.

How many Elmisaurus fossils have been found?

Elmisaurus remains are relatively rare, with only fragmentary fossils discovered so far. The original specimens consisted mainly of distinctive foot bones, though additional material has been found since its first description in 1981.