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 (459,340 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:
Grey
Kleptoparasite
[ *  *  *  *  *  * ]
Fragillimus335
Sep 26 2012, 04:43 AM
Hmm.. we really need to get a new pic for Spinosaurus in the op, maybe this?
Posted Image
The one that's there now looks pretty pathetic.
Nice pic ! Though, the neck seems way too slender to me.
Offline Profile Quote Post Goto Top
 
blaze
Carnivore
[ *  *  *  *  *  *  * ]
Maybe is the giant head and the skinny neck, but it doesn't look much better than the current one to me.
Offline Profile Quote Post Goto Top
 
Fragillimus335
Omnivore
[ *  *  *  *  * ]
Grey
Sep 26 2012, 09:31 AM
Fragillimus335
Sep 26 2012, 04:43 AM
Hmm.. we really need to get a new pic for Spinosaurus in the op, maybe this?
Posted Image
The one that's there now looks pretty pathetic.
Nice pic ! Though, the neck seems way too slender to me.
The head is too big, and the neck to thin, but at least it looks better than that anorexic cartoon that we currently have!
Offline Profile Quote Post Goto Top
 
Grey
Kleptoparasite
[ *  *  *  *  *  * ]
The model from Planet Dinosaur is the best to date IMO.
Offline Profile Quote Post Goto Top
 
SpinoInWonderland
The madness has come back...
[ *  *  *  *  *  *  *  * ]
Fragillimus335
Sep 26 2012, 01:47 PM
Grey
Sep 26 2012, 09:31 AM
Fragillimus335
Sep 26 2012, 04:43 AM
Hmm.. we really need to get a new pic for Spinosaurus in the op, maybe this?
Posted Image
The one that's there now looks pretty pathetic.
Nice pic ! Though, the neck seems way too slender to me.
The head is too big, and the neck to thin, but at least it looks better than that anorexic cartoon that we currently have!
Use this one instead:
Posted Image
head isn't too large, and the neck isn't too thin
Offline Profile Quote Post Goto Top
 
Verdugo
Member Avatar
Large Carnivores Enthusiast
[ *  *  *  *  * ]
This Spinosaurus looks much cooler, in my opinion :D

Posted Image

Made by Teratophoneus deviantart

For T rex, i suggest we should use this guy

Posted Image

Posted Image


Offline Profile Quote Post Goto Top
 
Grey
Kleptoparasite
[ *  *  *  *  *  * ]
The JP version of T.rex remains, overall, quite correct, despite some details. I read that Holyz, tyrannosaurids specialist, acknowledged on it.

Though, your guy is pretty cool and badass Verdugo.
Offline Profile Quote Post Goto Top
 
Verdugo
Member Avatar
Large Carnivores Enthusiast
[ *  *  *  *  * ]
Grey
Sep 26 2012, 02:35 PM
The JP version of T.rex remains, overall, quite correct, despite some details. I read that Holyz, tyrannosaurids specialist, acknowledged on it.

Though, your guy is pretty cool and badass Verdugo.
For Planet Dinosaur Spinosaurus, i has a pretty good pic that can be used for the OP :D

Posted Image


http://nq9.upanh.com/b3.s31.d2/302c9ebd6d2b0ed5b4a865845fa9dc78_49485709.spbookcoverv009finalrevised2.jpg
^ Direct link if the pic is too huge
Offline Profile Quote Post Goto Top
 
SpinoInWonderland
The madness has come back...
[ *  *  *  *  *  *  *  * ]
No, the Tyrannosaurus must be partially feathered, it's a coelurosaur
Offline Profile Quote Post Goto Top
 
Verdugo
Member Avatar
Large Carnivores Enthusiast
[ *  *  *  *  * ]
brolyeuphyfusion
Sep 26 2012, 03:35 PM
No, the Tyrannosaurus must be partially feathered, it's a coelurosaur
Nope, when it's young, yes, when it grows up, no. It would make large bodied creature like T rex overheated. But it may have partially feathered purely for display purpose. And because of this:
http://news.nationalgeographic.com/news/2012/07/120702-squirrel-tail-feathers-dinosaurs-fossil-science-proceedings/?source=hp_dl1_news_dinosaurs20120705
Seems like all Theropod should have feather, not just coelurosaur
Offline Profile Quote Post Goto Top
 
Grey
Kleptoparasite
[ *  *  *  *  *  * ]
brolyeuphyfusion
Sep 26 2012, 03:35 PM
No, the Tyrannosaurus must be partially feathered, it's a coelurosaur
Nothing definitive has been valided there. It is a possibility but far off a fact.
Offline Profile Quote Post Goto Top
 
theropod
Member Avatar
palaeontology, open source and survival enthusiast
[ *  *  *  *  *  *  *  * ]
just as likely as it is not to be feathered, but it seems like there is a growing consensus on tyrannosaurids with feathers. grey, i agree that the uppermost version has both a disproportionately large skull and too thin neck. this is the exact opposite to what one would expect from a fish eater which uses it´s jaws to grab and lift.
Offline Profile Quote Post Goto Top
 
Jinfengopteryx
Member Avatar
Aspiring paleontologist, science enthusiast and armchair speculative fiction/evolution writer
[ *  *  *  *  *  *  *  * ]
theropod
Sep 26 2012, 04:11 AM
We're very sorry; we've run into a problem processing your request. Please try again in a few moments. If you continue to experience problems, please contact JSTOR User Support for assistance.


JSTOR is paywalled. how come you have access?

Than you have to klick at what Gecko posted and log in, as he described.
Offline Profile Quote Post Goto Top
 
ArachnidKid
Heterotrophic Organism
[ *  *  * ]
Verdugo
Sep 26 2012, 02:31 PM
This Spinosaurus looks much cooler, in my opinion :D

Posted Image

Made by Teratophoneus deviantart

For T rex, i suggest we should use this guy

Posted Image

Posted Image


Yes! the photo's you provided are rather kick ass!
Offline Profile Quote Post Goto Top
 
Carcharadon
Member Avatar
Shark Toothed Reptile
[ *  *  *  *  *  *  *  * ]
I would prefer this for T.rex
Posted Image
Edited by Carcharadon, Sep 27 2012, 07:18 AM.
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.