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Top 10 Largest Theropods - Update

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Gigadino

MemberCompsognathusNovember 08, 2014

I'm back, and since there have been a lot of new things during last months, I think it's time to update my top 10 largest Theropods list. You may find some big surprises:

#1. Tyrannosaurus rex

Everybody's favourite meat eater. Called "the absolute wardlord of the Earth" by New York Times in 1905, it's the most famous dinosaur in this list. This guy is pretty big: the largest specimen in called FMHN PR2081, or "Sue", and it's the largest good Theropod specimen: it was around to 3.5 meters tall, with a lenght of 12.3 m. This guy wasn't the longest meat-eaters but, due to its massive built, it was likely among the heaviest. Estimates for "Sue" range from as little as 5.6 t to over 9.5 t. Hartman recently proposed a lower estimate, wich puts this animal at over 8 t. It can beat any other Theropods in my list in terms of weight and since this ranking is about the largest (=heaviest), it earned the first place.

#2, #3, #4: Mapusaurus rosae, Giganotosaurus carolinii, Carcharodontosaurus saharicus

The three largest Carcharodontosaurids are very similar in size, so they share a common place.

 

Mapusaurus is often thought to be just 10-11 m long. Actually, that's just a myth. Coria & Curria, Mapusaurus's describers, mentioned some specimens comparable in size with Giganotosaurus carolinii's holotype. There is also a specimen wich is 110 % the size of Giganotosaurus carolinii's holotype. That's just a piubic shaft, so we cannot give a precise estimate for this animal. If it was really 110 % the size of G.carolinii's holotype, it was 13.6 m long, but as this is a fragmentary specimen, we don't know if it really was that large. A wiser 12-13 m range is better for large Mapusaurus specimens. A weight range similar to that of Giganotosaurus is also feasible.

 

One of the well know guys is Giganotosaurus carolinii. This south american Carcharodontosaurid was discovered back in 1993, and it was one of the largest Theropods. The first specimen is a uncomplete skeleton (around to 50-70 % complete), wich is longer than "Sue" (at 12.2-12.4 m), but lighter (at 6-7 t). A second specimen has been discovered. It's a piece of dental, and it's estimated to be 6.5 % larger than the first specimen. If it was really that big, it was 13.2 m long, but again this specimen is very fragmentary, and precise estimates aren't safe. A 12-13 m range for this specimen is pretty good. Weight estimates ranges from 5 to 14 t, but something like 7-8 t is supported by most of the paleontologist.

Carcharodontosaurus saharicus is the most fragmentary of the three. It's been discovered back in 1927, but only recently we realized how big it really was. Its size strongly depends on its proportions: if it was small-headed, like Acrocanthosaurus, well, the largest speimen, SMG-din 1, would have been a huge behemot, at almost 14 meters long. However, a such build is pretty unlikely, as Acrocanthosaurus is a less derivated Carcharodontosaurid. The much closer Giganotosaurus is a big-headed Theropod, so a big-headed build is likely for Carcharodontosaurus saharicus, too. If it was big headed, it would end up between 12 and 13 meters. Again, 12-13 m is the best range for a such fragmentary beast. A weight similar to that of other giant Carcharodontosaurids is likely.

#5: Spinosaurus aegyptiacus

Once regarded as the biggest Theropod, something changed during last months. In fact, Ibrahim et. al proposed a new recostruction based on new materials. This time, the animal was much closer to the ground than before, and it had a much less deep chest, thus the animal would be lighter. There is no official estimate for the new recostruction, but Andrea Cau mentioned a 6-7 t figure, wich would fit perfectly for a such gracile animal. Spinosaurus aegyptiacus still holds the record as longest Theropod though, at 12-15 meters long.

#6: Tyrannotitan chubuitensis

This guy may not be that well know among the public, but it would definitely deserve to: it's got an epic name, rivalling Tyrannosaurus rex itself. Joking aside, Cau called it "the Cinderella of Giant Theropods", because it's often forgotten, when it's the largest Theropod know from good specimens along with T.rex. Its lenght was estimated at 12.2 m, and that's the only estimate I found. There's even a 13 meters one by GSP, but seems to be based on a 13 m Giganotosaurs holotype, wich is doubtfull. The largest specimen is around as big as Giganotosaurus holotype - so, between 6 and 7 t - making it one of the largest Theropod.

#7: Deinocheirus mirificus

This guy is a new entry. Once an unsolved puzzle, today the most depicted dinosaur on Deviant Art. Only recently we realized how much strange (and big) it was; we've new materials, wich includes two new very good preserved skeletons. This animal was in the 6-6.5 t range, according to new estimates based on new specimens, so it was almost as big as Spinosaurus. Its lenght is measured at 11 m long, thus it was pretty long as well. It may hold the record as the tallest Theropod, at over 4 meters tall.

#8: Acrocanthosaurus atokensis

This guy is easily recognizable due to its muscolar ridge on its back. Even though it isn't always mentioned, it's earned its place here, as it's one of the largest Theropod, as well as apex predator of its ecosystem. The largest specimen is called "Fran", and it's indeed pretty big; it's measured to reach 11,5 meters long over the curves. Weight estimates rage between 5 and 6 t, even though Mazzetta proposed a higher weight of 7 t. Cau said that this Theropod was much more gracile than Tyrannosaurus rex, so a 5-6 t range can be good.

#9: Therizinosaurus cheloniformis

This guy isn't mentioned everywhere, but it should. It's the most massively built Theropod, even more than Tyrannosaurus rex, thus it was among the heaviest. This guy is the only herbivore in my ranking, but it was a Theropod, so I included it. I've found a lot of estimates for this animal, but a 10 meters estiamte for lenght appears to be good. This animal could have weighted around to 5 t. It may have been the tallest Theropod, only rivalled by Deinocheirus.

#10: Suchomimus tenerensis

You weren't expecting to find it here, were you? Actually, even though it's often forgotten, it definitely deserves to be there. Suchomimus's type specimen is a sub adult, yet it's very big: it was originally estimated at 11 meters, but GSP later gave a 9.5 m estimate. However, hartman recently made a skeletal of this specimen, wich is 12 meters long. And it even wasn't an adult. Weight estimates rage from 4 to over 5 tonnes, thus a 4-5 t range can be good.

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kom
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He doesn't give reasoning and ?

This is discussed in the manuscript which will be used in a further paper. You think he's going to give a extended explanation about a not yet published study to some random guy on Facebook ? Seriously man...

 

If you have FB, you contact the guys, and done, you're clarified. 

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Carnosaur
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no, not expecting him to give you a study. merely he gives no reasoning for his supposed downsizing. thus, i won't take it until i have valid reason. already posted my examples as to why it wouldn't weigh less, don't feeln like re-iterating again.

Nature doesn't deceive us; it is we who deceive ourselves.

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kom
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Well I can ask specifically in a short question why there was such a downsizing, hoping he does not respond "I can't share as of now the content of the future detailled study".

But I can ask him. And you know, if you have FB, you can ask him too. 

I've read your examples and I'm unconvinced, the new shape of Spinosaurus really implies a shrunk weight estimate compared to the older, large legged, more massively chested reconstructions.

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Tyrant king
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Instead of yapping about how you talk to those paleontologists you show us all evidence. I don't believe you cause all 50 of your posts are based around how you talked to this guy. you should say what he actually said to you, that is if you even talk to him. And post a paragraph of what we says and make it so we know you talk to him and not just randomly found his post and put it on here.

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kom
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There's nothing special about talking to paleontologists, I've never expressed any pride from that.

I just see that you don't want to do it, maybe because you fear what they might say when they respond to you?

 My 50 posts are about that because the guys I'm talking to just don't want to believe me, because they don't want Spinosaurus to be downsized or more likely they don't want their opinion appear to be flawed.

Like if that was incredible that someone can contact a paleontologist. I've posted the response and even the screenshots and you still keep doubting ?

You just don't want to see the truth that's all.

One question, how old are you guys ?

 

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Spinosaurus Rex
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Im 20 son, and if i recall, i dont think we asked you to show yourself in anyway, you're kinda just going overboard, we just asked for a simple screenshot, which i guess you did, but the guy just states his opinion instead of going into depth on why he thinks the way he does. Im not afraid to contact him and/or get rude with him if necessary. I'm not afraid to say what i need to, which is the exact reason why i told you to cool it. We are talking about a new recontructed animal that hasnt been proven to be the correct image of it, so i suggest you drop the bias act.

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Tyrant king
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Your beating around the bush instead if just showing us evidence. The thing about the three if us( carnosaur, spino rex, me) are persistent as hell if you haven't already noticed. Aresale we ask is for pics or some form of evidence.

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kom
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Tyrant King, seriously ?  I showed you the data from the guy, I don't have the paper at hand, it's not still published. Is that so difficult to understand ?

 

Spinosarus Rex, I'm older than you. Son.

 

Normally a simple copy of my discussion was enough, on other board, no one asks and harass for a screenshot of a communication. Then I've posted the screenshot but some now are asking for the entire conversation as screenshot. 

 

The guy states his opinion because he certainly has other works to do than to give a lengthy responses on FB to a random guy and to share not yet published discussions, maybe still under discuss at now. You don't know how scientific domain works or what ?

Well contact him, get rude with him ? Ahah, you're going to harass the guy if he doesn't give the responses you'd like maybe ? You believe professionnal paleontologists owe you something maybe ? There's a really strange mentality on that board...

 

A new reconstructed animal with the latest revision, and I'm certainly giving more credits to Ibrahim's team than to "Carnosaur", "Tyrant King" or "Spinosaurus Rex". 

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Tyrant king
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Well Ibrahims team dosent have and evidence tk back up the new reconstruction.

pic of your dick? Really, is  that appropriate?

And j an sorry for the fact that we want evidence.

if you don't gave the paper then why did you bring it up?

really insulting? That is a sign if weakness.

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Spinosaurus Rex
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If the guy decides to downgrade my educated opinions and theories, i will not hesitate to give the same back. And did you really... need to bring that into this? If there is something ive learned in my lifetime, age does not always reflect on maturity, as i am seeing with you. I said nothing about anybody owing me anything, in fact its more about people needing to owe this animal for many always downgrading it and expecting people to accept it as the truth, when we still have little remains of it. 

Ah, turning my words back on me lol, how "mature" of you. You seem to enjoy expessing your maturity.

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Tyrant king
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@Kom,I thout you were like 12.

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Svanya
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Here is the screenshot Kom tried to post:

*For those having trouble posting images, just upload it to a hosting site like Tiny Pic or Imgur, then right click on the picture and "COPY" the image, then paste it directly to the part of the page where you want it to appear. Try not to post links, it's harder to get them to post correctly. 

Here is a link that can help: How to Post Images on Scified

Wat

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Lord Vader
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Well, KOM certainly brings up some interesting points, and until you guys provoked him, did it in a friendly manner. No need to be so persistent and rude to him. He did get immature after, but we all do. He did, you do, I do, everyone does. 

Jack of all trades. Master of none

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Spinosaurus Rex
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Nobody provoked him, he was spouting nonsense from the beginning and tried to make people who didnt agree with him look stupid. 

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Spinosaurus Rex
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His first comment :

 

Damn, why there are still people keeping with their 11 tonnes estimate for Spinosaurus since the authors of the publication THEMSELVES reject this, and have estimated Spinosaurus at 6-7 tonnes using digital model ?

 

People are really unable to perform a slight research and display humility rather than always playing the ultimate experts ?

 

Found one paleo-authority who at now agrees on a 11 tons Spino. You'll search for a while...

Now is that what you call "friendly" or are you once again defending someone who's clearly in the wrong due to you agreeing with his claims?

 

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Tyrant king
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easy guys, and he is right we diidnt provoke him. he got mad at us and said things and we retaliated back.

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Lord Vader
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Alright, not friendly friendly, just friendly, compared to you. I personally like to give people scone chances, so how about forgive and forget this time around? 

Jack of all trades. Master of none

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Tyrant king
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spino rex was actually somewhat friendly.

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Lord Vader
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Depends on if you're on his good side or bad side. Pretty sure I'm wayyyyyyy past his bad side. 

Jack of all trades. Master of none

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Spinosaurus Rex
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Forgive and forget will be an option if he changes his ways right away.

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