5 largest Theropods

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Acro Rex

NoobMember0 XPJun-18-2014 11:14 AM

Before i start, i'd like to ask you do not say "that's your opinion" or "every body has their opinion" on this list! This is the result of hours and hours of research!

To make things fair, the 'Fragmentary giants' from each species will not be factored into their respective sizes...just to many unknowns at the moment.

Anywho....let's kick it off, shall we?

5. Mapusaurus roseae

Family: Carcharodontosauridae

Length: 12.3 m
Height: 4.0 to 4.25 m
Weight: 5 to 6 t

Another giant Carcharodontosaurid coming out of South America. Mapusaurus was a giant, and what made that situation worse for the resident Sauropods is the fact these gigantic killers roamed in packs. A recent find saw the excavation of multiple individuals of varying sizes and ages, suggesting pack hunting behavior for the larger genus' of Carcharodontosauridae. The largest individual was around 10.3 meters long, yet a femur ~10% larger then that of the Giganotosaurus holotype points to an animal of around 13.7 meters.

4.  Giganotosaurus carolinii

Family: Carcharodontosauridae
Length: 12.5 to 13 m
Height: 4.25+ m 
Weight: 5 to 7 tons

Discovered in the late 90's, Giganotosaurus was thought to be substaintially larger then Tyrannosaurus Rex. However, new evidence has come to light that shows it wasn't only slightly shorter, but lighter as well. The  holotype was recently estimated at 12.2 m and if the second specimen is 8% bigger (Which I doubt it is) that still barely puts it in the 13 m range. (But as we know theropod skull sizes vary, so it doesn't hold much weight.) So here's the latest from Scott Hartman and we can put this to rest now I suppose, Sue is 0.5m longer and most likely heavier than Giganotosaurus Holotype by a ton or two.Of course we know the giga paratype but it's too fragmentary, otherwise we'll have to use all the fragmentary UCMP and MOR T Rex specimens just to be fairPosted Image

3. Tyrannosaurus rex

Family: Tyrannosauridae
Length: 11.5 to 13.2 m
Height: 4.25 m
Weight: 6 to 9 t (depending on which method you use)

We all know this animal; the star of the Jurassic Park films that has held a mainstream fixation for at least a hundred years. Estimates for this theropod have bounced around quite a deal, various studies have been conducted placing it at the ends of two extremes: ridiculously small and overly obese. The new 9-11 ton figured would produce something resembling a sausage casing rather then an apex predator. I myself did some calculations to get a better idea of how large Tyrannosaurus actually got. Averaging the length and weight of 10 individuals who are pretty well known, i got these results. The average tyrannosaurus would stretch the tape to ~12.24 meters and tip the scales at 7 tons. An impressively sized animal, indeed. It may not be ther largeest predatory dinosaur to ever stalk the earth, but it is the largest Tyrannosaurid as of today.

2. Carcharodontosaurus Saharicus

Family: Carcharodontosauridae
Length: 12.5-13.6 m
Height: 4.25 to 4.5 m
Weight: 7 to 9 tons

Carcharodontosaurus was a gigantic theropod; the largest of its family. It roamed Africa at the same time Spinosaurus did, although they would rarely ever come into contact let alone confront each other. That's just based on modern day animal behaviors though..Any way, Carcharodontosaurus was discovered in the early 1900's, yet wasn't really all that well known. The "African Skull" as it's sometimes referred to, was overexaggerated when first published. It was much closer to 1.5 meters as opposed to the 1.8 it was once thought to be. That's where the 15 meter, 12 ton estimates originated. Digging into it, and doing some calculations based off of the 144 cm skull, I got 12.8 meters and 8 tons for C. Saharicus. The 'maximum' skull length of 157 cm produces at a jaw dropping 15 meters and 9 tons.  A second species of Carcharodontosaurus cropped up in the 90's; C. Iguidensis. We have to call it Carcharodontosaurus iguidensis for now, it hasn't been assigned it's own genus yet. Something that boggles my mind is this, there are still those who maintain Giga and Rex are larger, how they do so in the face of evidence is beyond me..onto the next.

1. Spinosaurus Aegyptiacus

Family: Spinosauridae

Length: 16 to 18 m
Height: 5 m (7 m with the myscle ridge)
Weight: Indeterminate, probably between 9 and 12 tons

The size of this animal has been hotly contested for half a century or more now. The main issue with Spinosaurus is the holotype was bombed to dust in WWII. Other fragments have been found though, and they give us a basic idea of Spinosaurus' morphology. Basing off of related taxa, we also have a basic knowledge of its diet and possible behaviors. One ridiculous aspect when it comes to this animal is many think the holotype was a juvenile, which doesn't make much sense at all. They use that to 'prove' S. Aegyptiacus got to 18 m+. To any of those on this forum who believe this, i challenge you to provide me evidence of this...for i have not found anything of convincing nature to prove it. Spinosaurus sizes have been criticized by several paleontologist, but it's incomplete so we don't know how big it was. Estimates have varied between 12-18 m(Which is a big difference, just shows how little of it we have). Basing off the sestimated 1.75 m skull and  an 11 m Suchomimus, the math yielded a staggering 16 meters long and 10 tons in weight. Placing it at number 1 on this list.

This all can be debated, and if you feel like somethings wrong let me know!

Here's a neat image i found whilst doing this list..

"Our lives are in your hands and you have butterfingers?" - John Hammond
27 Responses to 5 largest Theropods

Lord Vader

LegendMember6270 XPJun-18-2014 12:49 PM

Nice list. Do I completely agree with it? No. Does that matter? No, it's your list, if you did the research, so be it, this is how it is. 

Jack of all trades. Master of none


2KMember3687 XPJun-18-2014 1:55 PM

Nicely done.


Acro Rex

NoobMember0 XPJun-18-2014 2:28 PM

what parts of it do you not agree with?

"Our lives are in your hands and you have butterfingers?" - John Hammond

Lord Vader

LegendMember6270 XPJun-18-2014 4:14 PM

The Spino weight, but that's just my opinion against your research. It doesn't matter, and I'm not trying to start anything.

Jack of all trades. Master of none

Acro Rex

NoobMember0 XPJun-18-2014 4:48 PM

no one said you were...? anyways, what do you think spino weighed? just curious :)

"Our lives are in your hands and you have butterfingers?" - John Hammond

Lord Vader

LegendMember6270 XPJun-18-2014 5:13 PM

I was just saying. For weight, I usually have it about 7-8 tons, topping out at 9 tons, and for my fights Spino is in the 7-8 ton range.

Jack of all trades. Master of none

John Morrison

NoobMember0 XPJun-18-2014 7:01 PM

Good list and hope to see more to come.

Ian Malcolm: No I'm, I'm simply saying that life - uhhh - finds a way.


NoobMember1 XPJun-19-2014 12:02 AM

What about acrocanthosaurus, it was 40 ft. long and 5.5-7 tons. Just wondering.

I also found these very compelling images concerning Rex vs Spino sizes.

Here you can see a 40 ft. rex and a 60 ft. spino, it shows that rex only comes two-thirds the length of spino. That is a big difference of size.

Here spino is slightly smaller, but you can still see that spino is way bigger.

And here is an awesome drawing of a Rex vs Spino fight. :)

Youre fat, and I'm not sugarcoating it cause you'd probably eat that too.

Lord Vader

LegendMember6270 XPJun-19-2014 12:36 AM

Jezza, I'm not sure what to say, but sixty feet is pretty much an absolute maximum for Spino, not an average. I myself see Spino averaging 50 feet in length, while Rex about 41 feet. Also, JP3 is about as accurate as my friends when the topic is guns. My friends don't know Jack about guns. Also, if that's the comparison, why do people get pissed off when we say the 37 foot Tyrannosaurus was a sub adult vs the 60 foot ADULT Spinosaurus. Wasn't the Spino ACTUALLY in the ball park of 45 feet long. The only image I actually agree with is the last one, and I'm going to stop this rant before I start cussing real bad.

Sorry if I seem angry, it's exam time here, I'm sick, and it's early in the morning, I don't even know why I'm awake.

Jack of all trades. Master of none

Dynamosaurus Imperiosus/ Raptorexxx 700

NoobMember3 XPJun-19-2014 1:01 AM

You know what i agree with you on almost evrything except one thing, the Tyrannosaurus's weight which should probably be around 9-11.03 tons but i agree with the rest (including spinosaurus size)

Rex Fan 684

NoobMember0 XPJun-19-2014 9:07 AM

Personally, here's my top 5


5. Acrocanthosaurus/Tarbosaurus/Mapusaurus/You get the idea

10-12 meters long and 4-6 tons


4. Carcharodontosaurus

11-12 meters long and 5-7 tons


3. Spinosaurus

14-17 meters long and 5-8 tons


2. Giganotosaurus

12-14 meters long and 6-8.5 tons


1. Tyranosaurus

12-15 meters long and 7-10 tons


Just my opinion/own research though


Jezza, I think these are more accurate size comparisons...



"Men like me don't start the wars. We just die in them. We've always died in them, and we always will. We don't expect any praise for it, no parades. No one knows our names." ―Alpha-98

UCMP 118742

NoobMember0 XPJun-20-2014 7:28 AM


I personally can't see how a Carcharodontosaurus would weigh more than a Tyrannosaurus. Carcharodontosaurids were gracile and long animals, whilst Tyrannosaurids were extremely stocky and robust. The second picture shows a Giganotosaurus, but that one was very similar in terms of robusticity (it was actually even robuster, heck there is even a subgroup of Carcharodontosaurids, the Giganotosaurines, which only had two big differences: the wierd boxy ending of the lower jaw and that they were more robust than other Carcharodontosaurids. As of now, only Giganotosaurus and Tyrannotitan are in that group).

Keep in mind that many people have died for their beliefs; it's actually quite common. The real courage is in living and suffering for what you believe in. -Brom-


NoobMember0 XPJun-20-2014 3:27 PM

So here is my opnion on the topic first of all, giga spino and rex I consider them like this 

spino= Light weight 

giga =medium weight 

trex = heavy weight 

and here are my max lengths and weights all of these are based off my reserch/opnion

spino 55 feet long and 7.5-8 tons 

giga 50 feet long and 8.5-9.5 tons 

trex 45 feet long and 9-10 tons 

"Somewhere on this island is the greatest predator that ever lived. Second greatest predator must take him down."Roland Tembo"

"Jurassic park: The Lost World"


NoobMember1 XPJun-21-2014 12:43 AM

That first image I found was from JP 3, sure the guy who made the comparison used those specific models, that's it. I was using max sizes on them Mr. Happy. I also didn't get my research on spino from JP 3, I got it from, well, multiple places (except for wiki), in fact, my post had nothing to do with JP 3. You know what, just ignore that little box with rex's size on the chart. They probably could've made rex a bit bigger, but really not that much. A sixty foot spino would look similar to that in my perspective.

The second chart i posted is very agreeable, it's got good sizes for both animals, but spino's a tiny bit small in my opinion.

I don't think those charts you found were accurate Rex Fan, but you don't mine accurate either, so it really doesn't matter. I especially think it's weird how spino looks like a skeleton in your second chart, if your charts and sizes were correct, t-rex would easily take spino (I wasn't refering to your top 5, just spino and rex, I actually quite agree with it for the most part). I do agree with UCMP's post, except for carchar's neck, dang that thing is tiny. It's like a bobblehead. Also thank you Raptorexxx 700 for your support.

Sorry guys, I'm homeschooled, so I don't get your exams. Though I'm so behind it's not even funny. ;)

Youre fat, and I'm not sugarcoating it cause you'd probably eat that too.


NoobMember1 XPJun-21-2014 12:46 AM

You know what, I just realized something, we're actually carying a spino/rex conversation rationally. 


 (I believe that's andrewsarchus in Rex Fan's first chart, the one to the left with the curly tail)

Youre fat, and I'm not sugarcoating it cause you'd probably eat that too.

Lord Vader

LegendMember6270 XPJun-21-2014 3:03 AM

Holy crap we are. 


I just don't see any reason for Spino to need to reach such massive sizes. The thing was most likely not an active land hunter for the most part, so it didn't need to have supercharged jaws and exceptional strength like Rex, who would be killing Hadrosaurs and possibley Ceratopsians and Ankylosaurs. 


Remember, I'm of the opinion that the one fossil found was from a rather large individual because it was the only one that was durable enough to survive the Sahara.


Like I said, sorry for kinda blowing up on you the other day. It was early in the morning, I wasn't feeling great, it's a stressful time of the year for me, and I'm a bit edgy when it comes to Rex vs Spino.

Jack of all trades. Master of none


NoobMember1 XPJun-21-2014 6:14 PM


It's cool Mr. Happy. I get grumpy in the morning too.

While I think spino was spent a lot of time in the water, I also think it got on land to hunt as well. It didn't have those long therapod legs for nothing. Spino's jaws actually did have to be quite strong, they had to keep massive slippery fish under control. Another way I think spino could have hunted was ambush, he'd sneak up on a drinking dinosaur by swimming underwater. Then, at the right moment, he'd strike forward with his jaws agape to grab the victims neck and pull it under to drown it. As you can see, that is exactly what crocs do. Another reason that I say spino had a very strong bite force is that he had the head of a crocodile, and everyone knows that crocs have to strongest bite force of today. Here's also another reason, that hunting tactic I used  earlier would need a strong bite force to grip a large animal, drab it under, and drown it while crushing its wind pipe. Spino would need a large body to compete with other dinos, survive in a land of giants (bahariasaurus, carcharadontosaurus, parililititan, etc.), and hunt on land. More evidence for spino actively being on land are those giant claws. Those claws didn't just stay tucked up next to his body 24/7. They were massive and had to have had some use.

I know this is off topic, what do you guys think of velociraptor climbing trees? It had all the right tools, its claws even face in the right direction for it.

Youre fat, and I'm not sugarcoating it cause you'd probably eat that too.


NoobMember0 XPJun-21-2014 8:07 PM

It would appear some paleontoligists think they did...the juveniles anyway. Read this paper...pretty cool stuff

Clicky click here

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


NoobMember1 XPJun-22-2014 11:29 PM

Nice Carnosaur, thanks. :)

Youre fat, and I'm not sugarcoating it cause you'd probably eat that too.


NoobMember0 XPNov-16-2014 3:35 AM

I'm completely disagree. Gig's holotype wasn't shorter than Sue, it was longer (by a slighty margin), but lighter. Carcharodontosaurus wasn't likely anything bigger than Giganotosaurus. Carch's skull was 156 cm long, around as long the one of Gig's holotype. SMG din-1 was likely beween 12 and 13 m, as big as or even slighty smaller than Giganotosaurus' largest specimen (but given that both are fragmentary, I treat them as two same sized animals), so there is no evidence that suggest us that Carch is the largest. And how can an average T.rex be 12.2 m long, when the largest is 12.3 m long? 

The comparison you posted is also wrong. Gig's skull is greatly exagerrated, it was closer to 1,4-1,6 m long. Mapusaurus' skull should be similar to that of Giganotosaurus in lenght. C.iguidensis wasn't even closer to that huge size, it was actually 83% the size of C.saharicus, so less than 11 m. Torvosaurus skull is also exagerrated, it was more like to 1,1-1,2 m long, the 1,58 m measurement was wrong. T.rex's skull is also too big, the largest one belongs to Sue and it's slighty over 1.4 m.

A good list would be, for me:

1. T.rex: 10~12,3 m; 4~8 t +

2. G.carolinii, M.rosae, C.saharicus: 12~13 m, 7~8 t

3. S.aegyptiacus: 12~15 m, 6~7 t

4. T.chubuitensis: 11,4~12,2 m, 6~7 t

5. D.mirificus: 11 m, 6~6,5 t

I know it's old, but I wanted to share my opinion.


NoobMember0 XPNov-16-2014 1:29 PMyeah, this list is innacurate...but he ain't active any more and had a grudge against carnosaurs( no pun intended, haha)

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


NoobMember1 XPNov-16-2014 2:35 PM

Agreed with your list Gigadino, even though further analysis and new findings could regularly change the position between the big carcharodontosaurids and Tyrannosaurus.

It's quite impressive how much Giganotosaurus body mass and proportions have been revised. In the late 90's it was supposed to weigh 30 % more than Tyrannosaurus and have a 1.95 m skull, now it is considered just in the same size range than Tyrannosaurus (with several Tyrannosaurus individuals slightly bigger) with a 1.56 m skull.

Unsurprising though when one compare an allosaur grade built and a barrel chested animal.


I m pretty sure too that Tyrannosaurus has the heaviest skull among theropods. I ve read McHenry dissertation about Kronosaurus queenslandicus biology, at one moment it compares the volumetric mass of its skull with others predatory reptiles.

It appears that Sue's 1.5 m skull is more voluminous than the 1.8 m skull of one of the known Kronosaurus individuals (of course the largest 2.3 m Kronosaurus skull are bigger). I d be interested in seeing the volumetric mass of the skull in large carcharodontosaurids.


NoobMember0 XPNov-16-2014 3:34 PM

Sue's skull is actually closer to 1.4 m long than to 1.5 m long (from what I read). Agreed that T.rex's skull is the most volouminus between the Theropods. Giant Carcharodontosaurids' skull are likely longer but more slender and definitely not as wide.


NoobMember0 XPNov-16-2014 4:16 PM1.5 m for sue's skull is rounded outdated figure. i think the official figure is ~1.43 m.

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


NoobMember1 XPNov-16-2014 5:29 PM

I think it depends the measurement. I'll check that.


InitiateMember164 XPApr-30-2017 11:20 PM

I mostly agree, you did really good points 

But I have still some doubts on carcharodontosaurus is larger than giganotosaurus, even a skull is larger, we have no carcharodontosaurus skeletons and it is more difficult to determine a size if you have no skeletons as reference, we just use imagination while looking at giganotosaurus.

The only wrong thing you said is that sue is longer than the giganotosaurus holotype, the height and size you showed is correct.

Sue is taller ( sue is 4 meters tall while giga holotype is 3.5 meters ), bigger and larger than giganotosaurus which was just longer .




The " giganotosaurus paratype " is just based on a piece of jaw, which is nothing to prove that it is larger than the holotype while Celeste the rex is based on a skullis larger than Sue's one.  Until we don't find any other bones i would exclude the giga paratype, with the holotype as the largest .

Sue is taller , bigger and heavier that the largest giganotosaurus 

In nature, or you kill...or you get killed -Jack London

I Meme Everything

2KMember4115 XPJul-06-2017 4:55 PM

5. Oxalaia quilombensis

Length: 39-46 ft

Weight: 5-7 tons


4. Spinosaurus aegyptiacus

Length: 40-50 feet

Weight: 6-7 tons


3. Giganotosaurus carolinii

Length: 40-43 feet

Weight: 7-8.2 tons


2. Carcharodontosaurus saharicus

Length: 40-44 feet

Weight: 8-9 tons


1. Tyrannosaurus rex

Length: 36-50 feet

Weight: 8-10 tons

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

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