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| Gorgosaurus libratus v Rajasaurus narmadensis | |
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| Tweet Topic Started: Mar 8 2012, 08:26 PM (8,796 Views) | |
| Taipan | Mar 8 2012, 08:26 PM Post #1 |
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Gorgosaurus libratus Gorgosaurus is a genus of tyrannosaurid theropod dinosaur that lived in western North America during the Late Cretaceous Period, between about 76.5 and 75 million years ago. Fossil remains have been found in the Canadian province of Alberta and possibly the U.S. state of Montana. Paleontologists recognize only the type species, G. libratus, although other species have been erroneously referred to the genus. Like most known tyrannosaurids, Gorgosaurus was a bipedal predator weighing more than a metric ton as an adult; dozens of large, sharp teeth lined its jaws, while its two-fingered forelimbs were comparatively small. Gorgosaurus was most closely related to Albertosaurus, and more distantly related to the larger Tyrannosaurus. Gorgosaurus was smaller than Tyrannosaurus or Tarbosaurus, closer in size to Albertosaurus and Daspletosaurus. Adults reached 8 or 9 meters (26 to 30 ft) from snout to tail. Paleontologists have estimated full-grown adults to weigh more than 2.4 tonnes (2.7 short tons). The largest known skull measures 99 centimeters (39 in) long, just slightly smaller than that of Daspletosaurus. ![]() Rajasaurus narmadensis Rajasaurus was an abelisaurid, a member of a group of theropod predators known to have lived only on landmasses that were part of the supercontinent Gondwana, such as Africa, India, Madagascar, and South America. Rajasaurus closely resembles Majungasaurus, a contemporary abelisaur from Madagascar, an island that had separated from the Indian landmass about 20 million years earlier.[4] It was found to be an abelisaurid through a phylogenetic analysis of anatomical characteristics, and was described as a carnotaurine abelisaurid (the subfamily including Carnotaurus) because of the configuration of its nasal bones and its possession of a growth ("excrescence") on its frontal bone. Rajasaurus is distinguished from other genera by its single nasal-frontal horn, the elongated proportions of its supratemporal fenestrae (holes in the upper rear of the skull), and the form of the ilia (principle bones of the hip) which feature a transverse ridge separating the brevis shelf from the hip joint. Rajasaurus was identified from a partial skeleton including a well–preserved skull (with a complete braincase and 70% of the rest of the skull bones recovered), hip bones and parts of the hind legs, backbone and tail. This specimen, GSI 21141/1–33, serves as the type specimen of the genus and species. Rajasaurus measured about 7.6–9 m (24.9–29.5 ft) long, 2.4 m (7.9 ft) in height, and weighed about 3 to 4 tons. The skull was short, measuring 60 cm (23.6 in) in length, and bore a distinctive low rounded horn. This horn is made up of outgrowths from the nasal and frontal bones. ![]() ___________________________________________________________________
Edited by Taipan, Nov 13 2016, 01:34 PM.
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| theropod | Apr 9 2014, 06:01 AM Post #31 |
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palaeontology, open source and survival enthusiast
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I think you are getting that impression because your comparison likely does not show them at parity (nevertheless, I wouldn’t exactly call that "outclassed"). The two animals are within 2% of each other in terms of axial lenght. I think the Ceratosaurus here is simply the heavier animal, which is qhat leads you to the assumption it was more impressive. But that’s like comparing an anaconda and a reticulated python at lenght parity and proclaiming the retic was outmatched. |
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| theropod | Apr 9 2014, 06:30 AM Post #32 |
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palaeontology, open source and survival enthusiast
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Gorgosaurus is likely bigger, there are many really large specimens of this guy, more than it’s usually given credit for. TL between 8 and 9m and a skull lenght approaching 1 metre seems to be fairly common, Rajasaurus seems smaller than that. |
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| thesporerex | Apr 9 2014, 06:40 AM Post #33 |
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Kleptoparasite
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That was awhile ago, I think its more even now. |
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| TheMechaBaryonyx789 | Apr 9 2014, 04:44 PM Post #34 |
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Herbivore
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Gorgosaurus would most likely win due to its superior weaponry and likely size advantage, adult Gorgosaurus are often underestimated and called 'gracile' because only the immature specimen has a skeletal based from its remains:![]() Even the immature specimen has a fairly impressive skull. |
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| dino-ken | Apr 9 2014, 06:44 PM Post #35 |
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Herbivore
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Agreed - I think many people on this match have underestimated the Gorgosaurus and over estimated the Rajasaurus. 1st off - Gorgosaurus is a Albertosaurine Tyrannosaurid. While it is fairly gracile (as the Albertosaurines are) when compared with the Tyrannosaurines like T.rex and Tarbosaurus - it's still a Tyrannosaurid. Which means it would have big teeth and a very powerful bite. 2nd - Rajasaurus was a Majungasaurine Abelisaurid. Which means it would have had a small skull and tiny teeth compared to other theropods of it's size. In addition - Gorgosaurus could definitely grow to be about 9 meters in length and weighed 2.7 tons, as the largest known specimen is already this size. While Rajasaurus's skull suggest that the holotype would have only grown to about 7 meters in length. So using Majungasaurus as a model - good estimate for the maximum size of Rajasaurus would be closer to 8 meters and weighed 2 tons (not the 9 meters and 3+ tons which as been so often used). Except - of course, unless the holotype wasn't actually an adult - which IIRC it is believed to be. So over all - IMO the fight goes to Gorgosaurus - 55/44. Edited by dino-ken, Apr 9 2014, 06:45 PM.
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| Megasaurus | Nov 12 2016, 03:30 AM Post #36 |
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Heterotrophic Organism
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gorgosaurus wins more time gorgosaurus had possibly stronger bite Rajasaurus weight is overestimation |
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| GallirallusAustralis | Nov 24 2017, 02:46 PM Post #37 |
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Autotrophic Organism
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Tyrannosaurid's jaws is much stronger. Gorgosaurus wins 65/35 |
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| Carnotaur | Nov 25 2017, 05:57 AM Post #38 |
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Saprotrophic Organism
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If adult Gorgosaurus reached 8m-9m in lenght, then it should win most battles with Rajasaurus comfortably. The latest estimate for Rajasaurus body lenght, from Grillo and Deulcort ( you can see it here), puts it at the 5,6m range, and thats way too small when compared to Gorgosaurus. |
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| Daspletosaurus | Nov 25 2017, 11:15 AM Post #39 |
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Heterotrophic Organism
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Abelisaurids (for the most part) were adapted for biting and gripping, their jaws could take side to side pressures and their necks were well adapted to holding prey still or thrashing side to side with pray, they were masters of attrition, out lasting there struggling pray. Tyrannosaurids (for the most part) were built for crushing and ripping, their jaws were heavy and thick supporting thick long teeth, (housing some of the largest bite forces known), with short stocky necks that could generate large amounts of force when pulling, and masters of the one shot kill... (as I have stated before this is my opinion and is solely based on my own observations and the research I have done.) So as for this match up, we put them at parity, I would say 8 meters long for both, and approximately 2.5 tonnes each. |
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| Drift | Jan 24 2018, 10:06 PM Post #40 |
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High Spined Lizard
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Size is often conflated with power which is false in matches like these, when at parity (aka most of the time) the one with a more effective killing apparatus is the victor. |
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