Amazing Animals Facts: 25 Deadliest Prehistoric Monsters That Existed

Excited for amazing facts of Prehistoric Animals?

The dinosaurs have become extinct and we’ve all introduced about them. Probably you have heard several theories about extinction and even, in the form of story or fact.

However, many deadliest animals were existed at the time of dinosaurs that you hardly know.

Regardless of the other dangerous animals that can found at the aquarium or zoo, there were other monsters or prehistoric animals who are still extremely fearsome and rare today.

They were fortunately extinct about million years ago!!! Some of these creatures are small and some are larger than the average man.

We could get this information through the knowledge and skills of archaeologists updated each year.

Below is a list of the 25 most deadliest prehistoric animals, may be they are not as famous as some known dinosaurs.


Dunkleosteus

Amazing Animals Facts: 25 Deadliest Prehistoric Monsters That Existed

The Dunkleosteus could give you nightmares and is an dangerous extinct fish. It is said that Dunkleosteus was one of the largest placoderms (a jawed fish). According to the media and resources, it was weighed about 4 tons and 33 feet long.

The creature is considered as a carnívora and a deadliest predator. This prehistoric sea monsters had no teeth, it was a carnivorous fish. It was reported that the fish contains two pairs of plates in gnathal area that created a beak like structure.

Dunkleosteus bites are always compared with a crocodile or T-Rex bite with an estimated pressure of 8000 pounds per square inch.

Fortunately, this prehistoric sea creature became extinct late in the Devonian period, otherwise it would swim in the ocean, it’s little scary….


Archaeopteryx

Amazing Animals Facts: 25 Deadliest Prehistoric Monsters That Existed

According to the scientists, it is the most primitive bird that ever lived. These birds are commonly famous as the “first bird”. During the late Jurassic period, this monster bird were existed in major parts of the southern Germany where Europe was no more than a group of islands at that time.

Researchers told the size of Archaeopteryx is about 1.6 feet tall that is the average size of a  common magpie presently and it was small, has large sharp teeth like razors, feathers and wings.

The toe claws of the bird were hyperextensible and therefore it was named as killing claw.


Elasmosaur

Amazing Animals Facts: 25 Deadliest Prehistoric Monsters That Existed

This animal existed during the Late Cretaceous. Elasmosaur weighed more than 2.2 tons and 46 feet long. His neck covered half the length of its body and had approximately 70 vertebrae more than any animal known today.

Being the animals with giant body size, Elasmosaur must have large fins. But, according to the Dr. Theophilus Turner who had found studied the fossils of Elasmosaur, it had four fins with small size. His body was accompanied by sharp teeth and a small head.


Deinotherium

Amazing Animals Facts: 25 Deadliest Prehistoric Monsters That Existed

Deinotherium was a prehistoric animal sometimes also known as elephant hoe. Scientists believed that this animal was the third largest land animal that ever existed. They lived during the Middle Miocene era and died sometime during the Early Pleistocene.

Deinotherium weighed more than 15.4 tons and 15 meters tall while standing. This creature has a appearance just like a elephant, the only real difference is that they had tusks attached to the lower jaw and had a shorter trunk.

Deinotherium fossils have been found everywhere, mainly in Europe, Asia and Africa.


Opabinia

Amazing Animals Facts: 25 Deadliest Prehistoric Monsters That Existed

There are only twenty or less that twenty models of Opabinia existed with excellent quality. Therefore, the Opabinia is one of the rarest fossils found in the world.

This creature is known to have a soft body and lived on the seabed. This species had a scary head with five eyes and a mouth with seven centimeters long body. The creature also had a segmented body, topped by a fan-shaped tail.

This extinct monster had also a horn that might be used for hunting or more likely to pass food to the mouth.


Helicoprion

Amazing Animals Facts: 25 Deadliest Prehistoric Monsters That Existed

Helicoprion is believed to lived during the Carboniferous period and also named as the Spiral Saw. Later, Helicoprion had become extinct during the Triassic period.

It is still chanllenge to find complete fossils of this monster sea animal. Archaeologists got a success to find the tooth-spiral and jaw bones and then they reconstructed it with many possible structure to find the idea about the appearance of Helicoprion.

The only fact we knew surely that this prehistoric species had teeth that much similar to a circular saw joined to the lower jaw. They were 10 to 15 feet long just like a shark and carried a multitude of teeth where new teeth displaces the old, constructing a spiral shape.


Quetzalcoatlus

Amazing Animals Facts: 25 Deadliest Prehistoric Monsters That Existed

Quetzalcoatlus was believed to be one of the biggest (not the largest) creatures existed but the theory of its existence is still vague.

The name of this species inspired from Aztec god Quetzalcoatl, also named as a feathered serpent. The prehistoric creature had a pointed beak to collect food, despite the fact that he had no teeth. The fossils were discovered and collected in Big Bend, Texas in 1971.

It is said that when he was on the ground, the animal was quadruped, and had so much power that they could directly take flight.


Dimorphodon

Amazing Animals Facts: 25 Deadliest Prehistoric Monsters That Existed

The Dimorphodons were lived in the early Jurassic period who were the medium-sized pterosaur. The fossils of Dimorphodons were found in Lyme Regis, Dorset, UK in the year 1828.

The average lenght of Dimophodon was about 3.3 feet, with a large head but small neck. They had usually a wingspan of 4.6 feet and tail that contains 33 vertebrae. The tail may be useful during the flight but it is confusing to estimate that whether the tail was useful as a mechanism to balance while walking.

Also there is a contradiction, whether the Dimophodon contain two legs or four.


Jaekelopterus

Amazing Animals Facts: 25 Deadliest Prehistoric Monsters That Existed

This creature was one of the largest arthropods discovered so far. The first fossil was found near the Prum, Germany. It is beleived that the Jaekelopterus had lived in fresh water of rivers and lake.

They are supposed to be 8.2 meters tall, however, the exact dimensions are still not clear.


Hallucigenia

Amazing Animals Facts: 25 Deadliest Prehistoric Monsters That Existed

Hallucigenia fossils were recently found in China and earlier in Canada and British Columbia. The fossils was found by Charles Walcott and the first sample observed by the Hallucigenia Simon Conway Morris. Therefore this creature was named as Hallucigenia.

The fossils of the creature is very strange and still a subject for study. We haven’t any full proof of any existence of this animal or it may be no more than a hallucination.

The creature had a bizarre appearance like a worm with a head that hadn’t eyes, nose and any sensory organs.

Hallucigenia had seven tipped tweezers in the tentacles on each side of his body, then three pairs of tentacles behind the first. Some of these tentacles were paired with thorns.


Liopleurodon

Amazing Animals Facts: 25 Deadliest Prehistoric Monsters That Existed

 

This creature had a large body and was a carnivorous marine reptile. Liopleurodon was the good swimmers with four strong limbs. They can swim with a great extent of acceleration.

It is recognized as a leader of the Jurassic and early Cretaceous seas and also one of the largest predators of their time. However, its size remains the point of controversies.


Predator X

Amazing Animals Facts: 25 Deadliest Prehistoric Monsters That Existed

The Predator X is assumed to belong to the family of pliosaur like the Liopleuredon. Predator X is an informal name that was given to a marine predator and thus claimed to be the most deadliest and fearsome species ever.

Predator X had 30 centimeters long teeth and usually had a life in oceans. The researchers revealed its length about 15 meters and it weighed around 45,000 kilograms.

His teeth were more powerful even compared to those of Tyrannosaurus rex, so its bite 10 times more powerful than any animal of today and four times more powerful than Tyrannosaurus rex.

There is one more thing that turns this creature even scarier that, they used only two of his four flippers for swimming and the other only two, when necessary, to catch prey.


Therizinosaurus

Amazing Animals Facts: 25 Deadliest Prehistoric Monsters That Existed

Although Therizinosaurus was not a predator, its appearance makes hysteria. When the fossils were first discovered, it was thought that it is a giant turtle-like reptile.

It is not known who belongs to the theropod family until 1950. Although it remains unclear who was supposed to Therizinosaurus primary herbivore.

They had a small skull, a top long neck and three clutches of one meter long on each of its two front legs. The claws are used to fight for territory or for mating and to reach the boughs ofleafy trees.


Megalania

Amazing Animals Facts: 25 Deadliest Prehistoric Monsters That Existed

Megalania is a giant seven-meter-long lizard armed with a set of very sharp teeth just like as knives, so it is very dangerous predator. Although they had venom glands along the jaw line.

While we are pleased that this monster no longer exists. It is assumed that the first Aboriginal people lived with this creature, being his prey once in a while before Megalania disappeared about 40,000 years ago.


The Terror Bird

Amazing Animals Facts: 25 Deadliest Prehistoric Monsters That Existed

This creature is formally known as Phorusrhacidae, but is widely known as bird of terror. It is dominant predators in South America during the Cenozoic. The terror bird was unable to fly but could run very fast trying to catch its prey. They had one meter long beak and as large as eagle. This beak empower them to swallow horses easily.


Argentavis

Amazing Animals Facts: 25 Deadliest Prehistoric Monsters That Existed

This is the largest one, ever discovered, from every aspect. The meaning of its name is  ‘magnificent bird of Argentina’. They had lived in South America and have a predator life. The bird was much likely to the glider like the condors today, but with much better skills earlier.


Sea Scorpion

Amazing Animals Facts: 25 Deadliest Prehistoric Monsters That Existed

Although they were widely known as sea scorpion, was not a real scorpion at all and only the first weremarine (later lived in freshwater only). It is formally known as eurypterid with 3 meters long body who lived in the water or above the seas and lakes during the Permian period and early Ordovician (460-250 million years ago). They became extinct about 250 million years ago.


Madtsoia

Amazing Animals Facts: 25 Deadliest Prehistoric Monsters That Existed

Madtsoia is giant snake, about 15-20 meters long. It is similar to pythons, and they become poisonous when tighten the prey until they die. Their victims were mostly dinosaurs. This predator managed to avoid extinction for a long time, until finally disappeared 45 million years ago.


Chocobo

Amazing Animals Facts: 25 Deadliest Prehistoric Monsters That Existed

You know the chocobo, the mascot of Final Fantasy? Is this animal there. When the dinosaurs died, they were left alone. That’s why we say that the chickens came from dinosaurs. They lived here in South America, then where have once been a home of chocobo.


Mosasaurus

Amazing Animals Facts: 25 Deadliest Prehistoric Monsters That Existed

Sharks are close this macabre sea monster. The shark usually only attacks when you are feeling to be provoked. The creature is relative of Comodo dragons (behold surprised us again; Dragons came from water). The estimated length of the monster were around 18 meters.

If you travel back in time and for some insane reason to jump in the water, you can bet you’re dead, because this animal will catch you in any condition.


Purussaurus

Amazing Animals Facts: 25 Deadliest Prehistoric Monsters That Existed

Purussaurus has a body structure like giant crocodile. This is a 15 meters long animal who had existence in Amazon. At the time of their occurrence, they are the most capable predators of the water and yes, there was the good reason. Purussaurus had a great strength of hunting and they can cut half of the bones of animal.


Entelodon

Amazing Animals Facts: 25 Deadliest Prehistoric Monsters That Existed

Entelodon was an evil boar… They could survive only upon meet feeding unlike the current pig families. The body had a most horrible looks and it was supposed the most monstrous mammals that ever existed.

Researchers and scientists believe that apart from the hunting, they frighten other predators to get the ready made prey and this way, they used to take the advantage of leftovers.


Azhdarchids

Amazing Animals Facts: 25 Deadliest Prehistoric Monsters That Existed

They are similar to the famous pterosaurs (the best known flying dinosaurs) and may have been the largest flying creatures ever existed. They were 12-15 meters long. Scientists believe that they did not hunt in flight, but relied on the wings and fed.

Any resemblance to the Great Toruk of Avatar is entirely coincidental.


Megalodon

Amazing Animals Facts: 25 Deadliest Prehistoric Monsters That Existed

They are the best known creature, but it is so big and scary that deserves to be on that list. Similar to the great White Shark today, it could reach 20 meters in length and weigh about 60 tons – that is, six times the size of a T-Rex.

With the character of Megalodon, Spielberg’s film would be an even bigger success.


Titanoboa

Amazing Animals Facts: 25 Deadliest Prehistoric Monsters That Existed

Perhaps this was the largest snake species discovered so far. They lived about 60 million years ago during the Paleocene in South America. It is estimated that this species would measure about 13 meters long, one meter in diameter and weighed about 1100 kilograms.

 

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