Edmontosaurus | Majestic Herbivore of the Late Cretaceous

Edmontosaurus was a herbivorous dinosaur, named after the city of Edmonton, Canada, that roamed the earth during the Late Cretaceous period. This was a time of great diversity and change in the dinosaur world.

In this post, we’ll delve into the fascinating details of Edmontosaurus, from its physical characteristics to its lifestyle and environment. We’ll also explore the significant discoveries that have shaped our understanding of this dinosaur, providing a captivating glimpse into a world long past.

Edmontosaurus Key Facts

Edmontosaurus Taxonomy and Timeline

Edmontosaurus, whose name translates to “lizard from Edmonton,” owes its moniker to the capital city of Alberta, Canada. The name is a combination of “Edmonton” and the Greek word “sauros,” which means “lizard.” 

This dinosaur belongs to the Ornithopoda group, specifically the Hadrosauridae family. Within the genus are two recognized subspecies: Edmontosaurus regalis and Edmontosaurus annectens.

This herbivorous dinosaur lived during the Late Cretaceous period, specifically from the Late Campanian to Lancian epochs. This was a time at the end of the Age of Dinosaurs when the earth was teeming with a diverse range of dinosaur species.

Listen to Pronunciation

Discovery & Fossil Evidence

The first discovery of Edmontosaurus‘ fossils was made in 1912 by Levi Sternberg in Alberta, Canada. This significant find was later described by Canadian paleontologist Lawrence Lambe in 1917. Since then, numerous fossils of this dinosaur have been found, providing valuable insights into its existence and characteristics.

Fossils have also been discovered in various locations across the United States, including Alaska, Colorado, Montana, New Jersey, North Dakota, South Dakota, and Wyoming. These fossils, which range from partial skeletons to nearly complete specimens, have greatly contributed to our understanding of this dinosaur’s physical attributes and geographical distribution.

Edmontosaurus Size and Description

Edmontosaurus was a large dinosaur that was characterized by its long, flat head and duck-like bill. Its body was robust and supported by strong legs that allowed it to move on either two or four feet. Its tail was long and flat and its skin was covered in scales. The dinosaur’s speed is estimated to have been moderate–suitable for its herbivorous lifestyle.

Size and Weight of Type Species

This was a sizable dinosaur with different estimates suggesting varying dimensions. Some sources suggest that it could have reached lengths of up to 39 feet and heights of up to 10 feet. Its weight is estimated to have been around 4 tons. However, these figures are averages and individual sizes could have varied.

The Dinosaur in Detail

Edmontosaurus is a marvel of prehistoric design with features that not only set it apart from other dinosaurs but also ensured its survival in the Late Cretaceous period. Its duck-billed head, for instance, was a unique adaptation that allowed it to feed on a variety of plant life, contributing to its herbivorous diet. Its bill was toothless, but numerous cheek teeth grew in columns and were continually replaced throughout its life. Skin impressions have been found from specimens of both Edmontosaurus species and display the designs of their scales.

Another notable feature is its ability to move both bipedally and quadrupedally. This versatility in locomotion likely gave it an advantage in terms of mobility and allowed it to adapt to different environments and situations. It also had a long, flat tail which may have served multiple purposes. While the exact function of the tail is still a subject of debate among paleontologists, it’s possible that it was used for balance, communication, or even defense against predators.

Edmontosaurus in its Natural Habitat

Edmontosaurus lived in a world vastly different from our own. The Late Cretaceous period was characterized by a warm climate and diverse vegetation, providing an ideal environment for this herbivorous dinosaur. It likely roamed across vast plains and forests, feeding on a variety of plants. North America was divided into two paleocontinents by an interior seaway. The Edmontosaurus was one of few dinosaurs that could be found on both Appalachia and Laramidia.

As an herbivore, it would have played a crucial role in the ecosystem by helping to shape the landscape through its feeding habits. Its diet likely consisted of ferns, conifers, and other plant life prevalent during the Cretaceous period.

The ability to move both on two legs and on all fours suggests a flexible lifestyle. It may have used its bipedal locomotion for faster movement, perhaps to escape predators or migrate over long distances, while its quadrupedal movement could have been used for slower, more deliberate actions such as grazing and browsing.

Interesting Points about Edmontosaurus

Contemporary Dinosaurs

Edmontosaurus, a creature of notable stature, shared its world with a captivating array of contemporaries. Among these were the North American dinosaurs Tyrannosaurus, Sphaerotholus, and Maiasaura. Their lives were intertwined in a complex web of survival and competition.

The terrifying Tyrannosaurus towered over this landscape. Its presence must have been a constant reminder of the harsh realities of life in this prehistoric world for Edmontosaurus. Yet, despite being significantly smaller, Edmontosaurus was no less important in the grand scheme of things. Its herbivorous diet played a crucial role in maintaining the balance of the ecosystem, and its potential role as prey could have influenced the hunting patterns of Tyrannosaurus.

On the other hand, Sphaerotholus and Maiasaura, while not as physically imposing as Tyrannosaurus, added their own unique perspectives to this prehistoric landscape. The distinctive dome-shaped skull of Sphaerotholus and Maiasaura, known for its nurturing behavior, might have had interactions with Edmontosaurus that were less confrontational but no less significant. These interactions, whether they were competing for similar food sources or sharing common nesting grounds, would have shaped the behavior and evolution of Edmontosaurus in subtle yet profound ways.

List Of All Dinosaurs

We have created a list of all dinosaurs we have covered here, sorted across the seven main groups of dinosaurs. We also include information about their type of diet, (omnivore, herbivore or carnivore) and the time they lived.

Frequently Asked Questions

Sources

This article was last fact-checked: Joey Arboleda, 06-11-2023

Featured Image Credit: I, CC BY-SA 3.0, via Wikimedia Commons