Welcome Guest [Log In] [Register]
Welcome to Carnivora. We hope you enjoy your visit.


You're currently viewing our forum as a guest. This means you are limited to certain areas of the board and there are some features you can't use. If you join our community, you'll be able to access member-only sections, and use many member-only features such as customizing your profile and voting in polls. Registration is simple, fast, and completely free.


Join our community!


If you're already a member please log in to your account to access all of our features:

Username:   Password:
Add Reply
Spinosaurus aegyptiacus v Tyrannosaurus rex
Topic Started: Jan 7 2012, 02:16 AM (459,126 Views)
Wolf Eagle
Member Avatar
M E G A P H Y S E T E R
[ *  *  *  *  *  * ]
Tyrannosaurus rex
Tyrannosaurus is a genus of coelurosaurian theropod dinosaur. The species Tyrannosaurus rex (rex meaning "king" in Latin), commonly abbreviated to T. rex, is a fixture in popular culture. It lived throughout what is now western North America, with a much wider range than other tyrannosaurids. Fossils are found in a variety of rock formations dating to the Maastrichtian age of the upper Cretaceous Period, 67 to 65.5 million years ago.[1] It was among the last non-avian dinosaurs to exist before the Cretaceous–Paleogene extinction event. Like other tyrannosaurids, Tyrannosaurus was a bipedal carnivore with a massive skull balanced by a long, heavy tail. Relative to the large and powerful hindlimbs, Tyrannosaurus forelimbs were small, though unusually powerful for their size, and bore two clawed digits. Although other theropods rivaled or exceeded Tyrannosaurus rex in size, it was the largest known tyrannosaurid and one of the largest known land predators. By far the largest carnivore in its environment, Tyrannosaurus rex may have been an apex predator, preying upon hadrosaurs and ceratopsians, although some experts have suggested it was primarily a scavenger. The debate over Tyrannosaurus as apex predator or scavenger is among the longest running in paleontology. Tyrannosaurus rex was one of the largest land carnivores of all time; the largest complete specimen, FMNH PR2081 ("Sue"), measured 12.8 metres (42 ft) long, and was 4.0 metres (13.1 ft) tall at the hips. Mass estimates have varied widely over the years, from more than 7.2 metric tons (7.9 short tons), to less than 4.5 metric tons (5.0 short tons), with most modern estimates ranging between 5.4 and 6.8 metric tons (6.0 and 7.5 short tons). Packard et al. (2009) tested dinosaur mass estimation procedures on elephants and concluded that dinosaur estimations are flawed and produce over-estimations; thus, the weight of Tyrannosaurus could be much less than usually estimated. Other estimations have concluded that the largest known Tyrannosaurus specimens had a weight exceeding 9 tonnes.

Posted Image

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).

Posted Image
Edited by Taipan, Apr 24 2015, 10:10 PM.
Offline Profile Quote Post Goto Top
 
Replies:
Jiggly Mimus
Member Avatar
Heterotrophic Organism
[ *  *  * ]
I dont know why Ausar I am oddly attracted to you as a friend(I know that probably didn't come out right).
Anywho any one else agree that Spiny here would have a fairly strong bite force?
Offline Profile Quote Post Goto Top
 
theropod
Member Avatar
palaeontology, open source and survival enthusiast
[ *  *  *  *  *  *  *  * ]
Ausar
Nov 8 2014, 10:44 AM
Stomatosuchus had like, no weapons though.

Edit: I might be wrong on that, it seems likely small, conical teeth existed in Stomatosuchus.
I wouldn’t really call those weapons actually. While the teeth themselves weren’t actually preserved, hasn’t it been suggested that Stomatosuchus was a suspension feeder, making the teeth most analogous to whale balean?
Offline Profile Quote Post Goto Top
 
bone crusher
Heterotrophic Organism
[ *  *  * ]
Well as of now according to the most reliable data or sources, it's clear that T.Rex should easily take this on land simply due to being heavier, much taller and more robust built. I know everything is debatable but simple logic tells us everything is more favorable to the Rex. Take a look at Spino's skeleton in frontal and top view especially and compare it to Sue's, tell me in a straight face if you can't tell which one has more fire power in a fight.
Offline Profile Quote Post Goto Top
 
theropod
Member Avatar
palaeontology, open source and survival enthusiast
[ *  *  *  *  *  *  *  * ]
Easier said than done. Do you have any frontal or dorsal views of a spinosaurus skeleton?

Seems unlikely, considering the obvious lack of a spinosaurus skeleton that's coMplete enough…
Edited by theropod, Nov 8 2014, 10:06 PM.
Offline Profile Quote Post Goto Top
 
Spartan
Kleptoparasite
[ *  *  *  *  *  * ]
Yeah Stomatosuchus seemed to be rather defenseless compared to Spinosaurus, my bad.

@Jiggly Aegypticus:

I don't think a Carcharodontosaurus would dare to challenge a Spinosaurus or vice versa.
If it happened, though, I would generally favor Carcharodontosaurus on land.
Offline Profile Quote Post Goto Top
 
Jiggly Mimus
Member Avatar
Heterotrophic Organism
[ *  *  * ]
did crusher say that spino was lighter than a t-rex are you kidding me :D Also with that extra weight anyone else agree that spino if threateed could slam into its oponets like a sauropod or at least smack them with its huge tail?
Offline Profile Quote Post Goto Top
 
Spartan
Kleptoparasite
[ *  *  *  *  *  * ]
Jiggly Aegypticus
Nov 8 2014, 11:29 PM
did crusher say that spino was lighter than a t-rex are you kidding me :D Also with that extra weight anyone else agree that spino if threateed could slam into its oponets like a sauropod or at least smack them with its huge tail?
Latest estimates from Cau place Spinosaurus in the 6-7t range. At parity I would favor any of the other giant theropods against it.
Spinosaurus' main attacks surely wouldn't be ramming or smacking anything with its tail. This would have been very ineffective compared to biting (or possibly attacking with its claws).
Offline Profile Quote Post Goto Top
 
Ausar
Member Avatar
Xi-miqa-can! Xi-miqa-can! Xi-miqa-can!
[ *  *  *  *  *  *  *  * ]
theropod
Nov 8 2014, 07:01 PM
Ausar
Nov 8 2014, 10:44 AM
Stomatosuchus had like, no weapons though.

Edit: I might be wrong on that, it seems likely small, conical teeth existed in Stomatosuchus.
I wouldn’t really call those weapons actually. While the teeth themselves weren’t actually preserved, hasn’t it been suggested that Stomatosuchus was a suspension feeder, making the teeth most analogous to whale balean?
I think so, but I was under the impression the description "small, conical teeth" implied some biting.

Though yeah, if those teeth were baleen-esque, it seems like Stomatosuchus wouldn't have any weapons going for it save for blunt trauma.
Edited by Ausar, Nov 9 2014, 12:03 AM.
Offline Profile Quote Post Goto Top
 
bone crusher
Heterotrophic Organism
[ *  *  * ]
theropod
Nov 8 2014, 10:05 PM
Easier said than done. Do you have any frontal or dorsal views of a spinosaurus skeleton?

Seems unlikely, considering the obvious lack of a spinosaurus skeleton that's coMplete enough…
Posted Image
Not exactly 100% dorsal view but you can easily discern how narrow the ribcage is compared to Sue's. I'm only going by what's available and considered reliable at present time, not a hundreds of other possible scenarios that people personally prefers. I'm not saying the weight or size can't change, it most likely will if ever so slightly. But if Cau suggests 6-7 tons then at least it's a relatively accurate start (one that's based on 3d scan and all), not some die hard Spino fan's wet dream 11 tons JP3 monster.
Offline Profile Quote Post Goto Top
 
theropod
Member Avatar
palaeontology, open source and survival enthusiast
[ *  *  *  *  *  *  *  * ]
The teeth not having been found, we can’t know for certain what shape they had, but I tend to think of them as either needle-like rows helping with filter-feeding and gripping very small animals, or as mere vestiges. Either way (as is apparent from the shape of the skull), it’s very unlikely it had the resistance required to do serious damage to a reasonably-sized animal by biting it.
Offline Profile Quote Post Goto Top
 
Jiggly Mimus
Member Avatar
Heterotrophic Organism
[ *  *  * ]
I don't mean to be naive. But shouldn't something with a large body size be heavier than something that doesn't I mean this creature was fairly large if you think about it and I have heard things going around 16-18 tons.
Offline Profile Quote Post Goto Top
 
theropod
Member Avatar
palaeontology, open source and survival enthusiast
[ *  *  *  *  *  *  *  * ]
Not sure what you want to say. Of course somethign with a large body size is heavy, indeed being heavy is the most commonly used definition of being large-bodied.
Offline Profile Quote Post Goto Top
 
Jiggly Mimus
Member Avatar
Heterotrophic Organism
[ *  *  * ]
To me it is bigger than a t-rex therefore it should be heavier.They weren't at parity i thought therefor giving spino an advantage. Also i think you guys are way underestimating those arms if understand right were over 300 hundred pounds so wouldnt that give a fairly large advantage to spino?
Think about this i mean all it would have to do is get those giant meat hooks into the t-rex and pull him down but id on't know just my opinion.
Edited by Jiggly Mimus, Nov 9 2014, 04:22 AM.
Offline Profile Quote Post Goto Top
 
Spartan
Kleptoparasite
[ *  *  *  *  *  * ]
But you did hear of the recent changes to Spinosaurus, didn't you?
Offline Profile Quote Post Goto Top
 
Levi
Unicellular Organism
[ * ]
Based on the new Spinosaurus model. I'd have to say Tyrannosaurs Rektz
Offline Profile Quote Post Goto Top
 
2 users reading this topic (2 Guests and 0 Anonymous)
Go to Next Page
« Previous Topic · Dinosauria Interspecific Conflict · Next Topic »
Add Reply

Find this theme on Forum2Forum.net & ZNR exclusively.