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Tyrannosaurus rex
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 (09-13-2018, 01:53 AM)GuateGojira Wrote:Guys, do you believe that "sue" is not the biggest T-rex？ Jack.Hoener has some huge T-rex's specimens may larger than sue, as a matter of fact, The Tyrannosaurs rex's maximum weight could up to over 12tones, more than twice of African bush elephant.(09-13-2018, 12:12 AM)Spalea Wrote: Very happy to read such conclusions like these ones about the T.rex ! After having read the Jack Horner's book "The complete T.rex" I remember to have been in total disagreement with his theory i.e. the T. rex was a total scavenger. I prefered the Robert T. Bakker's depictions which were revolutionary. 
Sadly, Jack Horner is not a good source, he said that he had another T. rex named "Celeste" years ago (at the 90's) and that was "10% larger than Sue", but since then nothing has been published. In fact, this is the only information available of this specimen:
 *This image is copyright of its original author This is from the book "Tyrannosaurus rex: the tyrant king". So no, there is not a larger specimen from the part of Horner. However, while for the moment there is not a T. rex "longer" than Sue - FMNH PR 2081, there is a heavier one. The specimen RSM P2523.8 know as "Scotty" was apparently heavier than Sue with more robust bones despite its similar length (c.12 m.). This is a picture of Scotty:  *This image is copyright of its original author These are the known bones of this specimen:  *This image is copyright of its original author The study of Campione et al. (2014) "Body mass estimation in non-avian bipeds using a theoretical conversion to quadruped stylopodial proportions" calculate a weight of 8,004 kg (6,000 - 10,007) for Scotty compare with Sue at 7,377 kg (5,531 - 9,224). Another study of Scott Harman from 2013, calculated a weight of 8,400 kg for Sue, this means that Scotty was heavier than that, probably around 9 tons. An amateur investigator at DevianArt named "Franoys" made abother study with Sue and he calculated a body mass of 8,830 kg, check this image from him:  *This image is copyright of its original author So if Sue weighed 8,839 kg, Scotty weighed more than 9 tons! From my point of view the maximum size of the Tyrannosaurus rex, for the moment, is 12.3 m long and a weight of c.9 tons.  
In my own personal view of Tyrannosaurus rex - like Arctodus simus ( also my personal view ) - T-rex was a scavenger, a kleptoparasite, and a part-time predator. He was the king of his territory and could displace any more accomplished predator from its kill.
We always heard female Tyrannosaurs are much larger, heavier and maybe even more dominant than the smaller males. Pete Larson and Carpenter are one of those who proposed such idea. But to be sure, I am not sure if the females are indeed bigger and more dominant than the males. It could be the males that are much bigger and dominant than the females just like most modern land apex predators.
(09-26-2018, 02:13 PM)johnny rex Wrote: We always heard female Tyrannosaurs are much larger, heavier and maybe even more dominant than the smaller males. Pete Larson and Carpenter are one of those who proposed such idea. But to be sure, I am not sure if the females are indeed bigger and more dominant than the males. It could be the males that are much bigger and dominant than the females just like most modern land apex predators. Just a thought; is there a typical size difference between sexes in birds? I really don't know much about birds. Do any of them ( the males ) battle for a mate or territory?  (09-26-2018, 02:47 PM)brotherbear Wrote:Apparently, scientists are able to distinguish T-Rex gender from skeletal remains, but how?(09-26-2018, 02:13 PM)johnny rex Wrote: We always heard female Tyrannosaurs are much larger, heavier and maybe even more dominant than the smaller males. Pete Larson and Carpenter are one of those who proposed such idea. But to be sure, I am not sure if the females are indeed bigger and more dominant than the males. It could be the males that are much bigger and dominant than the females just like most modern land apex predators. 
Some bird species have males which are the larger and dominant morph @
Not really @chaos, finding gender by just looking at fossils is actually nearly impossible. So far, only one specimen of Tyrannosaurus have been assumed as female called as MOR 1125 or B-rex because there is a medullary tissue found in its femur. It is known that only female birds have this kind of tissue especially when the female bird is about to lays eggs, so this Tyrannosaurus specimen is assumed to be female if what was found in its femur is indeed 100% similar to bird medullary tissue.  *This image is copyright of its original author  *This image is copyright of its original author  *This image is copyright of its original author 《T-rex Generation》 Cartoon painted by Ted.Rechlin a famous animal cartoonist (09-26-2018, 01:44 PM)brotherbear Wrote: In my own personal view of Tyrannosaurus rex - like Arctodus simus ( also my personal view ) - T-rex was a scavenger, a kleptoparasite, and a part-time predator. He was the king of his territory and could displace any more accomplished predator from its kill.As a matter of fact, Tyrannosaurus-rex was a positive and awesome super massive predator, meanwhile, it also played an role of super massive scavenger. Tyrannosaurus-rex like combined the role of tiger and brown bear in ecosystem at that period.  *This image is copyright of its original author  *This image is copyright of its original author
 *This image is copyright of its original author  *This image is copyright of its original author  *This image is copyright of its original author Tyrannosaurs-rex VS Triceratops (09-16-2018, 12:31 PM)GuateGojira Wrote: Sadly, Jack Horner is not a good source, he said that he had another T. rex named "Celeste" years ago (at the 90's) and that was "10% larger than Sue", but since then nothing has been published. In fact, this is the only information available of this specimen:Guate, have you heard about the UCMP 137538？it's said it would be the biggest T-rex individual according to calculation  *This image is copyright of its original author  *This image is copyright of its original author The UCMP 137538 specimen's photo  *This image is copyright of its original author In fact, ucmp 137538'body-size is based on sue or stan to calculate and estimate  *This image is copyright of its original author The size comparison between different T-rex individuals (11-29-2018, 07:08 PM)Smilodon-Rex Wrote:When and where was this UCMP found? Ever since my childhood I've been fascinated by the T-Rex, as have millions of others. It amazes me as to what new discoveries will eventually be un-earthed.(09-16-2018, 12:31 PM)GuateGojira Wrote: Sadly, Jack Horner is not a good source, he said that he had another T. rex named "Celeste" years ago (at the 90's) and that was "10% larger than Sue", but since then nothing has been published. In fact, this is the only information available of this specimen:Guate, have you heard about the UCMP 137538？it's said it would be the biggest T-rex individual according to calculation Great topic! |
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