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Mapusaurus roseae v Spinosaurus aegyptiacus
Topic Started: Nov 13 2015, 10:14 PM (5,980 Views)
Taipan
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Mapusaurus roseae
Mapusaurus ('earth lizard') was a giant carnosaurian dinosaur from the early Late Cretaceous (Cenomanian stage) of what is now Argentina. It was similar in size to its close relative Giganotosaurus, with the largest known individuals estimated as over 12.6 metres (41 ft) in length* and weight estimates of approximately 3 metric tons to 5.5 metric tons. Mapusaurus was excavated between 1997 and 2001, by the Argentinian-Canadian Dinosaur Project, from an exposure of the Huincul Formation (Rio Limay Group, Cenomanian) at Canadon de Gato. It was described and named by paleontologists Rodolfo Coria and Phil Currie in 2006. The fossil remains of Mapusaurus were discovered in a bone bed containing at least seven individuals of various growth stages. Coria and Currie speculated that this may represent a long term, possibly coincidental accumulation of carcasses (some sort of predator trap) and may provide clues about Mapusaurus behavior. Other known theropod bone beds include the Allosaurus-dominated Cleveland Lloyd Dinosaur Quarry of Utah, an Albertosaurus bone bed from Alberta and a Daspletosaurus bone bed from Montana.

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Spinosaurus aegyptiacus
Spinosaurus is a genus of theropod dinosaur which lived in what is now North Africa, from the lower Albian to lower Cenomanian stages of the Cretaceous period, about 112 to 97 million years ago. Spinosaurus may be the largest of all known carnivorous dinosaurs, even larger than Tyrannosaurus and Giganotosaurus. Estimates published in 2005 and 2007 suggest that it was 12.6 to 18 metres (41 to 59 ft) in length and 7 to 20.9 tonnes (7.7 to 23.0 short tons) in weight. The skull of Spinosaurus was long and narrow like that of a modern crocodilian. Spinosaurus is thought to have eaten fish; evidence suggests that it lived both on land and in water like a modern crocodilian. The distinctive spines of Spinosaurus, which were long extensions of the vertebrae, grew to at least 1.65 meters (5.4 ft) long and were likely to have had skin connecting them, forming a sail-like structure, although some authors have suggested that the spines were covered in fat and formed a hump. Multiple functions have been put forward for this structure, including thermoregulation and display. Dal Sasso et al. (2005) assumed that Spinosaurus and Suchomimus had the same body proportions in relation to their skull lengths, and thereby calculated that Spinosaurus was 16 to 18 meters (52 to 59 ft) in length and 7 to 9 tonnes (7.7 to 9.9 short tons) in weight. The Dal Sasso et al. estimates were criticized because the skull length estimate was uncertain, and (assuming that body mass increases as the cube of body length) scaling Suchomimus which was 11 meters (36 ft) long and 3.8 tonnes (4.2 short tons) in mass to the range of estimated lengths of Spinosaurus would produce an estimated body mass of 11.7 to 16.7 tonnes (12.9 to 18.4 short tons).

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Jaws
Nov 13 2015, 03:57 PM
Mapusaurus versus spinosaurus please taipan
Edited by Taipan, Apr 8 2018, 08:56 PM.
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Ausar
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Ceratodromeus
Feb 3 2016, 11:22 AM
Ausar
Jan 4 2016, 10:00 PM
Grimace
 
None of the other giant theropods could use their arms to grab
>The giant carnosaurs or Spinosaurus' fellow megalosauroids (among others) don't exist.

Even those that couldn't clutch and grip with their forelimbs (i.e. tyrannosaurids and MAYBE abelisaurids) wouldn't be at a disadvantage, as they could easily hold and grip with their jaws instead.

If by grabbing you mean the forelimbs will be the first thing touching the opponent, you're still laughably dead wrong; the only giant theropods that would be doing that would be the giant maniraptorans.
Grimace
 
and all of them would be pretty screwed if something was actually grabbing them in a position they couldn't bite effectively
And then Spinosaurus would dispatch its opponent with weaponry that's perfectly suited for effectively killing similar-sized, giant opponents...oh wait...
you read like, way too far into his post there.
No I didn't. Frankly, to suggest I did after reading my post would require reading comprehension problems.

I got an implication from one part that one could reasonably get from it (opponent is screwed because Spinosaurus has it in a grip where it couldn't effectively retaliate. What comes next? Spinosaurus is then able to dispatch said opponent->implying it has the weapon potency to do that) and decided to take into account possible things which he may have meant in the other (well...look back into my comment on that one). I looked just as much into it as I needed to, far from anything "way too far in".

However, considering how you accused me of looking way too far into Grimace's post, it makes me wonder if you (ironically) looked way too far into mine to come to that conclusion.

Nice try, though...not.
Edited by Ausar, Mar 3 2016, 08:40 AM.
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Snow Leopard
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Spartan
Feb 4 2016, 02:41 AM
What is the difference between bite force and jaw strength? I really don't think we can make conclusions about either one's intelligence. Mapusaurus also seems to be larger.


The Jaw Strength refers to how strong the jaw bone is. A Mapusaurus's jaw would have to be stronger, because it hunted 75 ton animals.

The Mapusaurus could use this to his advantage, if he tried to break the jaw of the Spinosaurus.

Mapusaurus was a pack hunter, requiring at least moderate intelligence to work together, and kill the prey. A Spinosaurus only had to grab a fish.


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Edited by Snow Leopard, Feb 4 2016, 11:07 PM.
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Spartan
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We don't know if Mapusaurus was a pack hunter. I also don't think intelligence would matter here especially since the difference wouldn't be enormous.
Edited by Spartan, Feb 4 2016, 11:33 PM.
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LordMax2222
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Spartan
Feb 4 2016, 11:32 PM
We don't know if Mapusaurus was a pack hunter. I also don't think intelligence would matter here especially since the difference wouldn't be enormous.
Is intelligence even a factor? Aren't these just mindless killers who's only thoughts are destroying each other?
I going to assume so, if they weren't they both would just walk away mildly confused, and these battles wouldn't really work.
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Drift
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LordMax2222
Feb 18 2016, 02:12 AM
Spartan
Feb 4 2016, 11:32 PM
We don't know if Mapusaurus was a pack hunter. I also don't think intelligence would matter here especially since the difference wouldn't be enormous.
Is intelligence even a factor? Aren't these just mindless killers who's only thoughts are destroying each other?
I going to assume so, if they weren't they both would just walk away mildly confused, and these battles wouldn't really work.
Intelligence is hardly ever a factor here,It's honestly right up there with "agility!!" on the list of things that don't impact battles as much as people think they do.I wouldn't call them mindless either but definitely not holding my breath for the day cognitive function becomes advantageous in dinosaur duels.
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Megasaurus
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Spinodontosaurus
Dec 30 2015, 12:54 AM
The Mapusaurus specimens were found in a big bone bed, representing quite a few separate individuals at least one of which is clearly a juvenile. It's not clear whether some of the say 10-11 meter stuff is adult or sub-adult; if large adults are >13 meters (possible, based on some of the remains) then even the <11 meter individuals could still be adults, but that doesn't mean they are.

Also if you subscribe to the Ibrahim et al. viewpoint that almost all spinosaurid fossils from the Cenomanian of North Africa belong to Spinosaurus then there is a large amount of size variation there too, with the S. aegyptiacus type specimen ending up as one of the larger specimens.
I agree
I think mapusaurus wins if it is 12-13 m long
If it is 10-12 m long i think 50/50
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Soopairik
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Map wins because it's only slightly smaller and was suited for land combat.
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MarlinMan133
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Mismatch in favor of spino.
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Taipan
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AngryAnteater123
Apr 8 2018, 10:23 AM
Mismatch in favor of spino.


Due to size, or what other factors?

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MarlinMan133
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Because size and, Spino lived in the same area as the larger and arguably more deadly Carcharodontosaurus and we know they have gotten into fights before such as the Spinosaurus sail with Carcharodontosaurus bite marks on it. Spino also lived with the giant crocodile Sarchosuchus. so I think it has the experience advantage. Mapusaurus did have competition with the large and very intimidating Giganotosaurus but that's about it for large carnivore competition. Mapusaurus also most likely hunted in packs so in a 1v1 I doubt it would know what too do against the hulking beast of a dinosaur. in a 1v1 spino 8/10 2v1 Mapu 10/10.
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Drift
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Snow Leopard
Feb 4 2016, 11:04 PM
Spartan
Feb 4 2016, 02:41 AM
What is the difference between bite force and jaw strength? I really don't think we can make conclusions about either one's intelligence. Mapusaurus also seems to be larger.


The Jaw Strength refers to how strong the jaw bone is. A Mapusaurus's jaw would have to be stronger, because it hunted 75 ton animals.

The Mapusaurus could use this to his advantage, if he tried to break the jaw of the Spinosaurus.

Mapusaurus was a pack hunter, requiring at least moderate intelligence to work together, and kill the prey. A Spinosaurus only had to grab a fish.


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This is definitely a mismatch in favor of Mapusaurus,The gape along with damage caused by the more deadly dentition would allow it to win.
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