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Allosaurus fragilis (Pack of 5) v Spinosaurus aegyptiacus
Topic Started: Oct 25 2012, 09:11 PM (19,018 Views)
DinosaurMichael
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Allosaurus fragilis (Pack of 5)
Allosaurus (play /ˌælɵˈsɔrəs/) is a genus of large theropod dinosaur that lived 155 to 150 million years ago during the late Jurassic period (Kimmeridgian to early Tithonian). Allosaurus was a large bipedal predator. Its skull was large and equipped with dozens of large, sharp teeth. It averaged 8.5 meters (28 ft) in length, though fragmentary remains suggest it could have reached over 12 meters (39 ft). Relative to the large and powerful hindlimbs, its three-fingered forelimbs were small, and the body was balanced by a long, heavy tail. As the most abundant large predator in the Morrison Formation, Allosaurus was at the top of the food chain, probably preying on contemporaneous large herbivorous dinosaurs and perhaps even other predators (e.g. Ceratosaurus). Potential prey included ornithopods, stegosaurids, and sauropods. Allosaurus was a typical large theropod, having a massive skull on a short neck, a long tail and reduced forelimbs. Allosaurus fragilis, the best-known species, had an average length of 8.5 meters (28 ft), with the largest definitive Allosaurus specimen (AMNH 680) estimated at 9.7 meters long (32 ft), and an estimated weight of 2.3 metric tons (2.5 short tons). In his 1976 monograph on Allosaurus, James Madsen mentioned a range of bone sizes which he interpreted to show a maximum length of 12 to 13 meters (40 to 43 ft). As with dinosaurs in general, weight estimates are debatable, and since 1980 have ranged between 1500 kilograms (3300 lb), 1000 to 4000 kilograms (2200 to 8800 lb), and 1010 kilograms (2230 lb) for modal adult weight (not maximum). John Foster, a specialist on the Morrison Formation, suggests that 1000 kg (2200 lb) is reasonable for large adults of A. fragilis, but that 700 kg (1500 lb) is a closer estimate for individuals represented by the average-sized thigh bones he has measured. Using the subadult specimen nicknamed "Big Al", researchers using computer modelling arrived at a best estimate of 1,500 kilograms (3,300 lb) for the individual, but by varying parameters they found a range from approximately 1,400 kilograms (3,100 lb) to approximately 2,000 kilograms (4,400 lb).

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This picture will be used from now on when more than 1 Allosaurus is requested in a fight.

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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Dark allosaurus
Oct 25 2012, 08:48 AM
3-6 allosaurus or as much needed vs spinosaurus
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MysteryMeat
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theropod
Jan 3 2013, 08:33 AM
if you ask me 16+m, with a proportionally rather short tail, is more than enough to easily overshadow any other theropod in terms of weight.
I think it has a normal-sized tail, Baryonyx has a rather long tail.
I agree Spino probably outweighed the next largest theropd by quite a bit.
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TyrantLizardKing
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I've seen on another forum (Topix) where most people voted a single Allosaurus over a Spinosaurus. But 5 is probably more than enough
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dinosaur
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The Allosaurus would win.5 is too much. However 2 out of 5 would be dead.
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theropod
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I think I change my opinion. Assuming we are talking about a 16-18m Spinosaurus, I think it would be too much for average, <9m Allosaurus. Large Allosaurus fragilis at ~9-10m woudl put up a more even fight, however still with a slight edge towards spinosaurus because it would have a tremendous height, weight and strenght advantage allowing it to pretty much easily kill a single Allosaurus.

I would still strongly favour a pack of 5 "Epanterias" sized Allosauruses tough, why ought to be obvious.
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yigit05
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spinosaurus win weight,stronger bite
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Drift
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Hmm while the fictional lengths and weights can help either of the two here, Allosaurus clearly takes this.
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Teratophoneus
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In this thread the best scale is the 7Alx one, wich don't use a liberal Spinosaurus and a conservative Allosaurus.

Imo Spinosaurus is the winner here.
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Composite Gojira
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Pack of 5?

Mismatch for Allos.
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Teratophoneus
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Composite Gojira
Aug 29 2013, 01:29 AM
Pack of 5?

Mismatch for Allos.
5 average, 8-9 m Allosaurus, not 5 36-40-feet long Epanterias.
Edited by Teratophoneus, Aug 29 2013, 01:56 AM.
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Composite Gojira
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Then it depends on the Spino size we're using. If we're talking the weird 18-19 meter estimate which I don't believe in at all, Spino takes this.

If we're talking Andrea Cau's ridiculously conservative 12 meter Spino, then it's still a mismatch for the Allos.

And if we're talking Hartman's 15.6 meter Spino, I'd be willing to say Allosaurus, though the pack will definitely take major casualties. Interpreting a 55/45 win rate. You've got to remember that when working against Spinosaurus and especially when working with a pack of Allosaurus agility is a huge factor, and Allosaurus has maneuverability down pat. I can definitely see a few go down, but if most just latch on to the sides and make incisions, Spiny's going to bleed out rather soon.
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Makaveli7
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Well, I was going to use Allosaurus packs taking down sauropods as an example as to how they could win, but Spino is faster and more heavily armed than sauropods.
Spino above 16 meters takes out average 8 or 9 m Allosaurus with his size, jaws and claws. Allosaurus pack could win fairly often, but I think 51/49 Spinosaurus.
Edited by Makaveli7, Aug 29 2013, 04:35 AM.
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retic
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one on one this would be a mismatch, but i think 5 allosaurus should be enough to take the victory. allosaurus wins about 60% of the time.
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thesporerex
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I think spinosaurus can handle it, its still heavier than all the allosaurus combined and would have and easier time picking them off since 1 ram, kick, tail swing, swipe and possibly bite would kill the allosaurus instantly or in seconds at most.
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SpinoInWonderland
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thesporerex
Aug 29 2013, 06:04 PM
I think spinosaurus can handle it, its still heavier than all the allosaurus combined and would have and easier time picking them off since 1 ram, kick, tail swing, swipe and possibly bite would kill the allosaurus instantly or in seconds at most.
Tail swing? :blink:

I don't think Spinosaurus' tail is of much use as a weapon.
Edited by SpinoInWonderland, Aug 29 2013, 08:46 PM.
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thesporerex
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SpinoInWonderland
Aug 29 2013, 08:41 PM
thesporerex
Aug 29 2013, 06:04 PM
I think spinosaurus can handle it, its still heavier than all the allosaurus combined and would have and easier time picking them off since 1 ram, kick, tail swing, swipe and possibly bite would kill the allosaurus instantly or in seconds at most.
Tail swing? :blink:

I don't think Spinosaurus' tail is of much use as a weapon.
I don't think spinosaurus would use it as a weapon but if the tail impacted with the allosaurus he would die by the impact force.
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