Jurassic World Movies

Top 5 Dinosaurs That Have Changed Over Time

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MemberAllosaurusJul-09-2017 8:22 AM

 5. Stegosaurus ungulatus


Stegosaurus is one of the most famous dinosaurs, but very different from how it was shown in older portrayals. It held its tail above the ground rather than dragging it, and it carried its head upright instead of horizontally. The spikes on its tail actually were positioned horizontally instead of upwards, making it a deadly weapon that could injure predators, and Allosaurus agrees. One Allosaurus was impaled in the crotch by a Stegosaurus spike. Ouch. However, I doubt that the thagomiser of Stegosaurus would fare well against larger titanic murder-machines like Tyrannosaurus rex.


4. Diplodocus carnegii



This was among the most lizard-like dinosaurs in the olden days, being portrayed as slow and stupid. It was thought that sauropods like Diplodocus lived underwater, but this has been disproven. It is now thought that they had spikes running down their spine, and a blow from their tail would break the sound barrier.


3. Triceratops horridus/prorsus



Definitely the second most famous and iconic dinosaur, Triceratops is not hard to recognise. Like all dinosaurs, it was shown as slow-moving and lizard-like, but it was larger and faster than previously thought, making the modern Trike more terrifying than older depictions. It was originally thought to have skin like an elephant or rhinoceros, but it actually possessed scales, and even had quills on its back and tail. Originally, this formidable herbivore was thought to charge at opponents like a bull, but this was disproven when it was discovered that the impact of charging would shatter its skull. Instead, Triceratops was more accustomed to stabbing and slashing in close-quarters combat. And in contrast to pop culture, it may have been more of a foe for the king than previously thought, which brings us to the penultimate entry on this list.


2. Tyrannosaurus rex

Knight Trex

Easily the most famous of all dinosaurs, Tyrannosaurus rex has gone through several drastic changes. At first, it stood upright, dragging its tail on the ground. Like all theropods, it was depicted as a dumb, slow-moving, lizard-like creature and was thought to be related to Allosaurus, classified as a carnosaur. It was also originally shown with three-fingered hands prior to the two seen in modern times. Its small arms were also stronger than previously thought. But as time passed, the Tyrant King only became more terrifying. It was later placed as a coelurosaurian theropod, making it more closely related to dromaeosaurs like Velociraptor. Like all carnivorous dinosaurs, it was later shown walking in a horizontal stance, making for a much quicker and agile animal. Prior to the claims of Jurassic Park, its vision was excellent, allowing for depth perception. It was also shown to be more intelligent than previously thought, being smarter than other theropods of its size such as Giganotosaurus. While old depictions showed T.rex as a solitary predator, new evidence shows that this beast may have hunted in packs. In addition, it was feathered, debunking the image of a scaly, reptilian rex. There is also evidence to suggest that Tyrannosaurus may have been bigger than previously thought--a massive JUVENILE rex measuring forty feet long and fifteen to twenty feet tall was uncovered last year, and it likely would have been forty-five to fifty feet long had it reached adulthood. Add to this a body built like a tank and designed to take extreme punishment, high intelligence compared to theropods similar in size, acute senses that can detect prey from far away, and jaws that can crunch straight through solid bone, and it's easy to see why it's the Tyrant King of the Dinosaurs.


Honourable Mentions:

Allosaurus fragilis

Allosaurus was once thought to be the top predator in the Late Jurassic--however, it has long since been dethroned by the likes of Torvosaurus gurneyiEpanterias amplexus, and Saurophaganax maximus. And it was thought to bite down on prey like a classic theropod, but instead, it used its upper-jaw like a hatchet, slamming it down onto prey items, creating tremendous shock and heavy blood loss.


Giganotosaurus carolinii

This is one of the cases where an animal is not as big as previously thought. Older estimates put the giant southern lizard at fifty feet long and twelve tons, but this has decreased to around forty feet long and 6.8 to 8.2 tons.


1. Spinosaurus aegyptiacus

Like all theropods, Spinosaurus was first depicted as standing upright in a tripod stance, dragging its tail on the ground. The first appearances of this animal showed what was essentially a giant carnosaur with a semi-circular sail on its back. However, like its fellow theropods, it transitioned to a horizontal posture. Then, it was made famous in Jurassic Park III, where it was shown as a powerful superpredator with an enlongated snout, powerful grasping arms, and a massive body. Around this time, estimates put Spinosaurus at sixty feet long and weighing twenty tons, which would make it the largest terrestrial carnivore. But then in 2014, that all changed. Its length was cut by ten feet, and its weight reduced to less than half. Spinosaurus only became more bizarre--walking on all fours and spending most of its time fishing in rivers. Although the days of Spinosaurus aegyptiacus being a behemoth hyper-carnivore are long gone--it still remains as one of the most bizarre and unique dinosaurs of all time, and my second-favourite.

"Part of the journey is the end..."

16 Replies


MemberStegosaurusJul-09-2017 8:47 AM

It's really interesting to see how we thought dinosaurs looked like in the past.

Godzilla... Truly a God incarnate.

I Meme Everything

MemberAllosaurusJul-09-2017 8:49 AM

^Modern dinosaurs>>>>>>>>>>>>>>>>>>old dinosaurs

"Part of the journey is the end..."


MemberStegosaurusJul-09-2017 9:06 AM


Godzilla... Truly a God incarnate.

The Hooded Figure

MemberStegosaurusJul-09-2017 10:14 AM


I Meme Everything

MemberAllosaurusJul-09-2017 10:18 AM

^Some scientists think that Triceratops was partially carnivorous and I just facepalmed

"Part of the journey is the end..."

The Hooded Figure

MemberStegosaurusJul-09-2017 10:25 AM



MemberTriceratopsJul-09-2017 10:34 AM

Those thagomizers would still inflict serious injury to T.rex.  

Where is the evidence for quills on Triceratops?  We only have phylogenetic bracketing to suggest this theory, based on irrefutable evidence from Psittacosaurus.  The only irrefutable evidence related to this theory is that there were large scales between smaller ones.

Tuft Love's Rex would not gotten much longer if said specimen reached adulthood.  Heavier yes, but not much longer.  See my comment on the topic on this specimen.

Paleontologists are still unsure whether Saurophaganax and Epanterias are valid genera, or if they're just much larger specimens of Allosaurus fragilis.  And the hatchet-bite theory, while interesting, may not actually be valid.  Just because the skull could absorb high magnitudes of maxillary force, doesn't necessarily mean that it did bite down on prey the way it's shown.  This video explains why, from 15:40-18:50.  I'm also guilty of thinking about it that way in the past.

I have never heard, from a credible source, that Spinosaurus would have weighed 20 tons before Ibrahim et al's reconstruction.  The highest estimate from said type of source was 12 tons.  The 60 foot long estimate was from Jack Horner on an interview on the set of JP3 that was a part of the special features for the movie, but keep in mind that very little fossil evidence was still known, AND the JP3 crew only made that Spinosaurus 43 feet and 9 inches long, with the animatronic measuring 45 feet total, so they didn't even go overboard with Horner's hyped exaggeration.

Spinosaurus may not have even been an obligate quadreped.  If it pulled its neck in, and raised its tail and torso, then its centre of mass would have shifted from its torso its knees, which is where it was for any theropod when in locomotion.  And of course, there's Scott Hartman's criticism of Ibrahim et al's study, which states that the pelvis and hind limbs were too small in the study, which suggests that Spinosaurus' hind limbs, though still small for such a large therapod, were not as small as suggested.

I Meme Everything

MemberAllosaurusJul-09-2017 10:58 AM

^I think they found bumps on its back and tail that may have held the quills. 20 tons may be a fanboy estimate, but I got it from this chart:

"Part of the journey is the end..."


ModeratorAllosaurusJul-09-2017 11:06 AM

From lumbering reptiles to fast moving feathered giants, pretty amazing.

Good grief.

I Meme Everything

MemberAllosaurusJul-09-2017 11:07 AM

^Yeah. Spino went from a sail-backed rex to a hyper-carnivore to a piscivorous crocoduck.

"Part of the journey is the end..."

Sci-Fi King25

MemberAllosaurusJul-09-2017 12:43 PM

(No dromaeosaurs?)


I agree with a lot of the points stated, but Alphadino already listed all the points I disagree with.

“Banana oil.”- George Takei, Gigantis: The Fire Monster

I Meme Everything

MemberAllosaurusJul-09-2017 12:44 PM

^They've changed a lot, but not enough to make it on top 5

"Part of the journey is the end..."

Something Real

MemberTyrannosaurus RexJul-09-2017 3:42 PM

DRACONUS - This was an exceedingly interesting presentation! I can not wait to see what Mankind will "reenvision" dinosarus to appear as in the next ten or twenty years. Who knows? Perhaps you will look back upon our "modern" ideas of dinosaurs and think we were foolish to believe what we do now! :)


MemberAllosaurusJul-10-2017 6:53 AM

I was hoping to see Iguanodon and Megalosaurus on this list.


Sci-Fi King25

MemberAllosaurusJul-10-2017 7:28 AM

^Those two probably changed the most out of any dinosaur.

“Banana oil.”- George Takei, Gigantis: The Fire Monster


MemberAllosaurusJul-12-2017 1:48 AM

Yeah, saw nobody was mentioning the first and second dinosaur discovered.

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