19 Dino-mite Angulomastacator Facts That You Should Know


The Angulomastacator, which means ‘bend chewer’ due to the shape of the upper jaw, belongs to the cretaceous period. The fossil specimen of this dinosaur was found in upper shale member of the Aguja Formation in Texas. A single specimen of a partial left maxilla was discovered having curved bone. It was a herbivorous animal that mostly consumed soft plant matter including flowers and fruit.

It has been classified as lambeosaurine hadrosaur having the genus name of Angulomastacator. The shape of its hollow crest is not known but the hollow part is believed to be true. The size is not known but it was a large creature.

The habitat of this dinosaur consisted of river channels and flowering plants. It lived in a place with predators like the Saurornitholestes and omnivores such as Leptorhynchos which could eat a baby Angulomastacator. The huge crocodile-like Deinosuchus posed threat to this dinosaur whenever they came close to a source of water.

The name A. daviesi was given in honor of Kyle L. Davies, who was the first one to postulate that the Aguja Formation could have been the residence of a lambeosaurine. The ever-replacing tooth row of the herbivore helped the dinosaur to eat plants daily.

The lack of fossils barring the single bone found in the upper shale member in Texas makes it difficult to determine the vertebrate paleontology of the dinosaur found in the cretaceous period.

Angulomastacator Interesting Facts

How do you pronounce 'Angulomastacator'?

Angulomastacator is pronounced as 'An-gu-loe-mas-tah-ca-tor'. The name of this dinosaur was given by American paleontologists Jonathan R. Wagner and Thomas Lehman.

What type of dinosaur was an Angulomastacator?

The study of the Angulomastacator dinosaur suggests that this duck-billed dinosaur belongs to the genus of hadrosaurid due to its bent jaws. It was unique to its environment and time. It has also been classified as ‬lambeosaurine hadrosaurid, which might imply the dinosaur had a head crest that was hollow. The lack of complete fossils has led to trouble among scientists to properly classify them.

In which geological period did the Angulomastacator roam the Earth?

Based on the study of the single specimen of the Angulomastacator, it is supposed that the dinosaur roamed the surface of the earth during the Campanian Age of the Late Cretaceous Period. It first appeared about 84 million years ago.

When did the Angulomastacator become extinct?

Angulomastacator lived on the surface of the earth about 83.5 million years ago till the Maastrichtian Age. It became extinct around 72 million years ago.

Where did Angulomastacator live?

The fossil of this species of dinosaur has been found in Coahuila (Mexico). The Aguja Formation in North America in Big Bend National Park in Texas is the region where the fossil specimen of Angulomastacator was found.

What was the Angulomastacator's habitat?

The habitat of the Angulomastacator consisted of a ridge. It lived mostly in a coastal plain environment which had a muddy land connecting the ocean and narrow river channels. Many flowering plants bloomed along the coast. The fossils of this species were found in the upper shale member of the Aguja Formation that had a small tributary channel. Volcanic rocks have been found in the same area going back to 76.9 million years ago.

Who did the Angulomastacator live with?

The Aguja Formation where the Angulomastacator lived was an environment that consisted of a number of other dinosaurs. The Angulomastacator lived in large family groups as it was lambeosaurine hadrosaur. The environment included ceratopsians including Yehuecauhceratops and Agujaceratops, ankylosaurs such as Edmontonia and also another hadrosaur namely Kritosaurus.

How long did an Angulomastacator live?

It is difficult to determine the longevity of these dinosaurs as there is not much data to analyze.

How did they reproduce?

There is very little to no data about these dinosaurs and hence the reproductive process of the Angulomastacator is unknown. As a result of this, facts about their clutch size, age of sexual maturity, and gestation period cannot be determined.

Angulomastacator Fun Facts

What did the Angulomastacator look like?

The duck-billed dinosaur Angulomastacator had a hollow crest that was connected to its nose. It can be identified from its jaws which were weirdly curved in the downwards directions. The curve was at an angle of 45 degrees which is quite fascinating as it is unlikely for a hadrosaur to have such curved jaws. As there is not much fossil evidence to go through, the rest of the body cannot be determined. It probably would have been a chunky dinosaur and facultatively bipedal.

The fossils of the body of the Angulomastacator are yet to be discovered.

*We've been unable to source an image of Angulomastacator and have used an image of Lesothosaurus instead. If you are able to provide us with a royalty-free image of Angulomastacator, we would be happy to credit you. Please contact us at [email protected]

How many bones did an Angulomastacator have?

The lack of complete fossils of these dinosaurs makes it difficult to calculate the number of bones of the Angulomastacator. However, as it has been classified as a lambeosaurine hadrosaur, it would have been a chunky animal and thus had a large number of bones to support the weight of its body.

How did they communicate?

It is not yet known how these dinosaurs communicated with one another but in all probability, they communicated visually as is the case with most of the dinosaur species that roamed earth millions of years ago in the cretaceous age.

How big was the Angulomastacator?

From the little study that has been done of the Angulomastacator, it has been estimated that the dinosaurs would have a body length of 23 ft (7 m). The height of the dinosaurs is yet to be determined by paleontologists.

How fast could an Angulomastacator move?

The speed of the Angulomastacator daviesi is not known as of yet due to the lack of fossils. Being a lambeosaurine hadrosaur, it is estimated that it could run at 38 mph (61 kph) while hopping.

How much did an Angulomastacator weigh?

The estimated weight of the Angulomastacator is taken to be about 4409 lb (1999.89 kg).

What were the male and female names of the species?

The male and female members of the Angulomastacator have not been given any distinct names.

What would you call a baby Angulomastacator?

No specific name has been given to a baby Angulomastacator to date.

How aggressive were they?

Since the Angulomastacator was a herbivorous dinosaur, scientists are of the opinion that it was a docile animal without much aggressive behavior.

Did You Know…

The Big Bend Region of Texas was home to many dinosaurs in the Cretaceous Period besides the Angulomastacator. Some of the specimens which roamed the area consisted of Torosaurus, Alamosaurus, Stegosaurus and Tyrannosaurus along with many other dinosaurs.

The upper shale member of the Aguja Formation was a vital place in natural history. Many fossils have been found at this place of a number of dinosaurs.

The study of fossils or vertebrate paleontology is very important to determine which animals existed on the planet in prehistoric times. The natural history of the earth can only be determined by studying the fossilized remains of ancient creatures and it is helping scientists to research the age of the planet and the transformations which have taken place over millions of years.

*We've been unable to source an image of Angulomastacator and have used an image of Zolmoxes instead. If you are able to provide us with a royalty-free image of Angulomastacator, we would be happy to credit you. Please contact us at [email protected]

Subscribe for virtual tools, STEM-inspired play, creative tips and more

By joining Kidadl you agree to Kidadl’s and and consent to receiving marketing communications from Kidadl.