what an amazing find, to my knowlegde both giganotasaurus and carcaradontosaurus are known from fairly fragmentary remains. im sure there will be a lot of great papers revisiting the reconstructions of those animals soon
:-) Giganotosaurus is known from a pretty complete skeleton all things considered. Carch isn't too far behind but far more fragmentary, more Utahraptor-style in that we have almost no articulated Utahraptor bones but know lots about it nevertheless. I agree regarding future reconstructions!!! Thanks for commenting!
I find it fascinating that the Carcaradontosaurids produced so many giant predators. But perhaps that's why they went extinct. Maybe they became too accustomed to hunting extremely large prey but when their environments changed and the large prey became less abundant their massive size became more of a disadvantage. Perhaps that combined with competition from other Therapods drove them to extinction. Just my 2 cents.
While plausible, what I think happened is as sauropods got bigger(South American wise anyway) the charchar family decided to keep growing. We will never know what made them go “extinct” but maybe it was themselves evolving into larger predators that were only killed in the asteroid extinction event.
Giganotosaurus, Mapusaurus, Tyrannotitan, and now Meraxes are all giant Carcharodontosaurids of roughly the same size that lived in Argentina. What's with Argentina and its massive Carcharodontosaurids? What's even funnier is that Giga, Mapu, and Meraxes all lived at roughly the same time periods as Meraxes is only a few millions years after Giga and before Mapu.
I know one of the people who worked on this guy, Akiko Shinya. I worked with her during my stones and bones 2022 camp. She is a very nice person and I still keep in contact with her
@@FossilCrates Also, Dr. Curtice I wanted to tell you that I had my birthday at the Field museum labs with Akiko and Dr O'Conor and Lance Grande (and an astroid geologist named Holstein) and after I got to eat some pizza and cake I actually went to the 3d printers where I saw some of your casts on the side.
@@greyideasthetheliopurodon4640 That makes my heart sing! What a great birthday experience!!! And to hear our casts were there was the cherry on top for me :-)! Happy belated birthday!
Another awesome video! I love the details about the specific humerus ratios, adjusted sharpness of both forelimb vs toe claws (which IMO genuinely DOES raise implications about their usage) and the fusion of pelvic/sacral bones- too many people overlook details like this and miss out on some rich info!
Thank you for your kind words! Though your daily path didn't take you to a daily paleo job I am happy to hear you are still loving paleontology! The internet makes it so much more accessible than it was when I (and possibly you) grew up.
I think you have to take on count Megaraptorans, here in Argentina we are barely scratching the surface in the research of these animals, they were theropods with big and powerful arms, not so tiny head, and they reached the KT limit with the abelisaurids, dominating the food chain of the late cretaceous.
Excellent point! They don't mention 'em in the paper and I didn't think of them, despite the fact we sell an Argentine megaraptorid claw cast and have been indirectly involved with some megaraptorid projects for ~20 years. Mea culpa and great point!
Yep, Megaraptorids seem to be popping up everywhere in Southern Patagonia. They appear to be edging out the Abelisaurids in that region by the end of the cretaceous, not nearly as common the further north you go, however. There must have been some kind of zonal barrier at the time, perhaps to do with climate or environmental factors.
@@paulw6057 The carchs go extinct at the Turonian, many, many millions of years before the Very Bad Day while the abelisaurids make it to the Very Bad Day.
I agree! Carcharodontosaurids are some pretty cool beasts. By the way, have you filled out a bracket for our 2022 Chewly Chompionship? You can get the bracket from our website fossilcrates.com. Giganotosaurus is the #2 seed!
@Dan Folkes (paleotologist) Hi! Check out www.PaleoPortals.com/join for out x2/month live paleo Zoom sessions. Email me Brian@FossilCrates.com with any other questions!
Got to love these giant mysterious carcharodontosaurids. Does the discovery of the age of this particular meraxes gigas have any wider implications on the life span of giant theropods? Perhaps they live longer than we estimate?
It suggests at least some were capable of living longer, right now I'd say folk would think tyrannosaurid lives were too violent and couldn't get that old, perhaps carchs had a slightly gentler life?
Great video! I would watch an unlimited number of videos like this. Please consider making more such as ones about both popular and obscure dinosaurs. Thanks so much. P.S. I have the Torvosaurus Fossil Crate and it's one of my most prized possessions.
So glad you love the videos! We are working on more vids of obscure and popular ones :-) So glad you loved the Torvosaurus crate!!! It is one of my personal favorites too!
know you have already done some short videos on the storage rooms,but id still like to see an extended tour since iv read Jim Jensen's sauropod fossils are stored there and there only a few photos of them...
@@gnarkill176 I enjoyed the exhibit. I thought the interactive elements are fun for the kids and even the adults. The skeletons of the various members of the Tyrannosaur family were impressive, which includes Scotty. I felt it was worth the price of admission to Fernbank. There is also a documentary on the dinosaurs found in Antarctica as well.
On the subject of the head size to arm length ratio.... am I missing something? It doesn't feel like a mystery to me. The larger the head, the smaller the arms need to be to help balance the body weight. If they had huge skulls and huge arms, would they not be too front heavy? So one needs to give way for the other. Idk, I'm not a paleontologist, so it can't possibly be that easy. But that's what keeps going on in my brain.
We have animals like Deinocheirus with big heads and large arms but they aren’t apex carnivores. It was a surprise to find the big head small arms in a third group of large theropods, and in paleo when one finds convergence like this it certainly suggests theropods have in their DNA something that makes this the outcome. Like you suggest, it may be balance related. Or something else. We will keep looking :-)!
@@FossilCrates Ah, yes. I misunderstood you in the video. I thought you said Deinocheirus had a relatively small head (even though I was unsure about that). So then perhaps chasing prey was easier with smaller arms partially for aerodynamic purposes as well as weight distribution purposes? Having the arms smaller, lighter and relatively close to the body while running could help when chasing prey, since the jaws really were the main weapon involved for the kill.
@@alecmcgrathofcanada9175 Makes sense. Another hypothesis I recently heard was the arms were smaller because they lived in family unit and as the size and bite strength increased, having long arms meant risking losing them wild feeding together.
Carcharodontosaurids probably grew slower in a fast changing environment before late cretaceous began. Drought eliminated their food source during the mid cretaceous.
The middle finger of it's feet was larger than the rest so it's assumed that it used it's feet to either kill preys with it's kicks or against rival males during mating season.
From the image in the paper it looks like it is Digit II, not Digit III, which makes it the inside toe claw and not the middle. I added the paper link in the description box.
I dont think its a coincidence that sauropod diversity drops off around the same time. I think Carcharodontosaurids specialised in sauropods and their demise was the reason. Abelisaurs better generalists wernt affected.
Well technically because Alamosaurus was the last Titanosaurian sauropod that lived in the late Cretaceous period with the same time period as T. rex but not in the same place
@@memes7317 I believe Sampson and Loewen found Tyrannosaurus in the North Horn Fm of Utah. I have described Alamosaurus from that Formation. I wonder when we will find them at the same locality? That’d be awesome!
I noticed that the diversity of carcharodontosaurs are highly concentrated in South America the largest ones are mostly from this continent don't get me wrong carcharodontosaurs were also in Africa (Carcharodontosaurus Eocharcaria ) Asia ( Shaochilong) Europe ( Concavenator) and North America (Siats Acrocathosaurus) but the fact they're so common in South America amazes me is it because of it's location it allowed them to become giants? Why are theses scary huge predators not common in Africa for example maybe they are once scientist will found evidence a lot of questions indeed. The fact Meraxes lived slightly after Giganotosaurus is scary.
I suspect sampling bias in part is to blame and we will find more in Africa and Asia as we locate more sites. It is scary to think Mapusaurus is younger (and larger) than Meraxes. It reminds me of northwestern North America tyrannosaurids diversity-wise.
You know that Carcharodontosaurids is another top favorite group of theropods along with The Tyrannosaurids and I think the reason why the carcharodontosaurids were wiped out because I think those certain type of species couldn’t be able to adapt to a change in the environment which is why Abelisaurids were successful predators.. without large sauropods even medium sized ones the large predator will still be doomed as its primary prey item has disappeared but nonetheless one of the last Abelisaurids lived in the Late Cretaceous period in Morocco but was beloved to have died from the KT extinction event
I like what you wrote but I do have one doubt, that these big theropods hunted large sauropods. As a sauropod researcher that’d be way too dangerous. Far better to eat the small ones and the big size might have been needed to competition for mates?
@@FossilCrates I did forget to mention that they needed to hunt in a pack to take one down because a fully grown Titanosaurian is too dangerous to hunt alone
@@memes7317 We almost never see packs of lions take down an elephant, too risky for the individuals. Even if they hunted in packs, they’d be targeting smaller animals. Titanosaurs likely lived in herds, making it even more dangerous. There is suggestion Mapusaurus may have hunted as a group, or perhaps a family unit.
@@FossilCrates Phil Currie believed that allosauroids were evolved to go after big dinosaurs like the sauropods because of their their teeth which could cut meat from bone and also because they were very active animals which was a must since they would need to eat something as big as a person each and every day just to survive.
@@keerthivasannambiraju955 Hi! Thanks for commenting! One question I always have about that is why would they need to go after big sauropods? That is too dangerous in my opinion. It would make more sense that they were eating smaller, more abundant animals like baby and juvenile sauropods, hypsilophodontids, and the like. Look at large predators today, they almost never go after animals as large, or larger, than them. Even packs of lions steer clear of fully adult elephants unless they are desperate. And sauropods were much larger than elephants. I don't believe sauropods were "walking meat lockers" either, if that were the case then why wouldn't modern sharks swim up to blue whales and take bites from them?
@@FossilCratesok did u also know that it’s arms were smaller than a T. rex and it has a sickle toe claw and some say that meraxes used it’s feet to pin it’s prey down and use it’s jaws to finish the job
@@OMNH1188 Cool info! I only know of what I've read in the academic papers and the unpublished photos I have observed from researchers visiting the material.
Wait if this carnivore live up to ~ 46 years can T. rex live the same age Thomas car a well known tyrannosaur expert thinks that Sue (the oldest T. rex) was young when she died this could be evidence that theropod dinosaurs could live longer
thanks for the video realy interessting bwe i have biteforce from agrocantosaurus 10 000 newtone and from giganotosaurus carolinie 13.600 newton but i can not finde something charchaodontosaurus except some maximum unrealistic estimates like 30k newtons hahaha
Personally I dislike the current name, Meraxes Gigas, or Meraxes, sounds less like a dinosaur, and more like a undiscovered Mesopotamian Emperor, and sounds more like an individual to me. Meraxesaurus sounds far better to me personally, cooler too. And if you think coolness shouldn’t apply to the names of ancient animals, you are never telling me the people who named the Saurophaganax, Tyrannosaurus Rex and Sarcosuchus, didn’t think at some point, ‘yeah that’s a cool name.’
Hahahah! I hear ya! I know for a fact Saurophaganax was thought of as cool, Chure worked to keep as much of its original name, Saurophagas, as he could (it was already taken by a lizard eating bird). I'd like to say I don't have a list of potential dinosaur names for taxa I need to name, that I'd simply select a useful feature (like Triceratops or Stegosaurus or Ankylosaurus, all of their names tell me immediately something about them), but I can't say 🙂
It is one of the largest but t Rex is simply heavier and bulkier then all the rest making it the biggest,length and height don't determin bigger I could be 176 pounds at 5,5 feet tall and someone beside me is 154 pounds and 7,3 feet tall,height and length don't equels power or mass or being giant
Define biggest. Do you mean length or weight? Brachiosaurus wins both. No one will ever know for sure. However, my money is on T. rex! No one will ever know this one for sure. I’d say Spinosaurus though.
why Meraxes??!! What bothers me is the name. It's my opinion, but giving names based on fictitious things from POPULAR culture (not ancient mythology) to a dinosaur annoys me. But nothing worse than the dinosaur named Thanos. That although they say that perhaps it is based on mythology, it is made clear that it is in the character that they already know what it is.
@@FossilCrates I read on wikipedia (english and spanish) that it was named after the gringo character from marvel. Or maybe I don't quite understand what you're saying dr. I'm Latina, from Costa Rica, I don't speak English, I use Google's translator 😂 But I love very, very much, the dinosaurs.
the giga skull is 1.53 and and more than 1. 60 is oversize because they stretch the skull to get a bigger dinosaur by the spino is the same the skull is 1,6 m long 1,7 m is not currently
It is such an amazing feeling to find one! To know you are the first person to lay eyes on an animal that lived millions and millions of years ago is awesome! Keep at it and I'm sure you can become a paleontologist. You can possibly join a local dig to get started.
Correct! I find it interesting that the authors don't address fragmentary large T. rex specimens like Scotty in their fragmentary big skull section. They only address Sue and that is why that is the only one I mention. I definitely would redo that section if I were easily able to, but videos are "locked in stone" 🙂
@@FossilCrates Maybe that is because averaged across all skeletal elements listed by Persons et al., Scotty is like ~1% larger than Sue, so it didn’t really seem worthwhile? I mean, we can scale up Sue by 1% in our mind to account for that if we want, but for all practical intents and purposes, Sue is only negligibly farther away from being the largest _T. rex_ than it was before Scotty was described, the latter just got way overhyped as some sort of monster outclassing the previous record holders, as seems to be done with every alledged new "biggest theropod". Also, the second _Giganotosaurus_ (despite also being way overhyped when it was first publicised) also keeps getting ignored in these sorts of comparisons, despite that specimen being described as 8% larger than the holotype (though granted, that measurement has justifyably been called into question…albeit by a bunch of people who have never seen the actual bones or taken any measurements of them).
Their paper (check the link in my response to another person on this page) states 140cm for Sue. Interesting that, if your numbers are true (can you provide me a peer-reviewed source for your numbers?), they skipped a giant specimen in Scotty and may have undersold Sue? Def please provide me sources from the academic literature with measurements. Thank you for your comment!
@@FossilCrates you only have to enter sue skull size 99.9 percent of the entries are 150 cm and with scotty skull size you have to go to reconstructions of scotty
@@rex432m.5 I also know websites copy one another and that when I started in paleo Ultrasaurus was listed as the world’s heaviest dinosaur. Just because it is common doesn’t make it correct. I was hoping you could point me to a paper where a paleontologist measured the original skull. I will do some digging!
I found the source they used: Brochu C.A. Osteology of Tyrannosaurus rex: insights from a nearly complete skeleton and high-resolution computed tomographic analysis of the skull. J. Vertebr. Paleontol. 2003; 22: 1-138
@@rex432m.5 I found the measurements! length, tip of snout to back of left quadratojugal 140.7 cm length, tip of snout to back of right quadratojugal 138.0 cm These are from Brochu 2003, a person that actually studied and then scanned it. I would consider these to be "official" numbers. Anything that says 150 cm isn't looking at the original fossil, or is a typo, or is from a different specimen. The Meraxes paper doesn't use other Trex skulls I suspect because they aren't as complete, I don't think Scotty's skull is even 70% complete, which means there is certainly doubt on its total length.
The skull of tyran length is 140 cm, giga is 169 cm, cardo is 160 cm, and Spinosaurus is 175, and he says that tyran has a large skull, 🤣🤣🤣, in fact, it is a large skull, but it is the smallest among giants
One item of note is that the T. rex skull is *heavily* built compared to the veritable flyweight Spinosaurus (all slender snout). The Giganotosaurus and Carcharodontosaurus skull bones aren't as massive either. Holding the skull bones in one's hand showcases how robust the massive Tyrannosaurus is. The others are big for sure, and I am loathed to use the term gracile here, but they aren't as robust in construction. This makes sense as they were eating different prey in different fashions. Thanks for commenting!!!
@@Dinosaurssongs Tyrannosaurus. Spinosaurus, with those long gharial-like dentaries and maxilla, is a lightly built skull inc comparison to the massive bone-cruncher that is T. rex.
@@Dinosaurssongs Keep in mind we do not have a complete Spino skull. The one we created is via upsizing a number of disparate parts to reflect what we believe this skull would look like. So there is no way to answer that question with actual bone to bone comparison. Comparing the casts, though, the T. rex skull would be heavier.
i love hearing the passion in his voice, as a meraxes gigas fan myself, im so glad i found this video
Blush! Thank you for your kind words!!!
what an amazing find, to my knowlegde both giganotasaurus and carcaradontosaurus are known from fairly fragmentary remains. im sure there will be a lot of great papers revisiting the reconstructions of those animals soon
:-) Giganotosaurus is known from a pretty complete skeleton all things considered. Carch isn't too far behind but far more fragmentary, more Utahraptor-style in that we have almost no articulated Utahraptor bones but know lots about it nevertheless. I agree regarding future reconstructions!!! Thanks for commenting!
I find it fascinating that the Carcaradontosaurids produced so many giant predators. But perhaps that's why they went extinct. Maybe they became too accustomed to hunting extremely large prey but when their environments changed and the large prey became less abundant their massive size became more of a disadvantage. Perhaps that combined with competition from other Therapods drove them to extinction. Just my 2 cents.
Definitely plausible!!!
While plausible, what I think happened is as sauropods got bigger(South American wise anyway) the charchar family decided to keep growing. We will never know what made them go “extinct” but maybe it was themselves evolving into larger predators that were only killed in the asteroid extinction event.
@Dan Folkes (paleotologist) But Giga and Carchar were heavier than Acro though. 🤷
my 10 cents
Giganotosaurus, Mapusaurus, Tyrannotitan, and now Meraxes are all giant Carcharodontosaurids of roughly the same size that lived in Argentina. What's with Argentina and its massive Carcharodontosaurids?
What's even funnier is that Giga, Mapu, and Meraxes all lived at roughly the same time periods as Meraxes is only a few millions years after Giga and before Mapu.
I suspect they needed to be large because of either the prey they specialized in or because of reproductive reasons.
Probably because they want to exploit the abundant of Titanosaurid species?
Skull of Meraxes seems to be quite similar to Acrocanthosaurus.
I wonder who made the cast, maybe they used Acro as a guide?
I know one of the people who worked on this guy, Akiko Shinya. I worked with her during my stones and bones 2022 camp. She is a very nice person and I still keep in contact with her
That is so cool!!!
@@FossilCrates Also, Dr. Curtice I wanted to tell you that I had my birthday at the Field museum labs with Akiko and Dr O'Conor and Lance Grande (and an astroid geologist named Holstein) and after I got to eat some pizza and cake I actually went to the 3d printers where I saw some of your casts on the side.
@@greyideasthetheliopurodon4640 That makes my heart sing! What a great birthday experience!!! And to hear our casts were there was the cherry on top for me :-)! Happy belated birthday!
@@FossilCrates Thank you Dr Curtice, I look forward to seeing more of your stuff and your wonderful casts.
@@greyideasthetheliopurodon4640 My pleasure! I hope to get back to producing more videos next month!!!
Another awesome video! I love the details about the specific humerus ratios, adjusted sharpness of both forelimb vs toe claws (which IMO genuinely DOES raise implications about their usage) and the fusion of pelvic/sacral bones- too many people overlook details like this and miss out on some rich info!
Thank you so much for your kind words! I am glad you enjoyed it. I will strive to keep making these deeper cuts of academic papers!
Thank you for sharing this. Really enjoyed it.
Thank you for your kind words!
Palaeontology has always been my first love, although my path in life went nowhere near it. I loved this video, and have subscribed.
Thank you for your kind words! Though your daily path didn't take you to a daily paleo job I am happy to hear you are still loving paleontology! The internet makes it so much more accessible than it was when I (and possibly you) grew up.
I think you have to take on count Megaraptorans, here in Argentina we are barely scratching the surface in the research of these animals, they were theropods with big and powerful arms, not so tiny head, and they reached the KT limit with the abelisaurids, dominating the food chain of the late cretaceous.
Excellent point! They don't mention 'em in the paper and I didn't think of them, despite the fact we sell an Argentine megaraptorid claw cast and have been indirectly involved with some megaraptorid projects for ~20 years. Mea culpa and great point!
Yep, Megaraptorids seem to be popping up everywhere in Southern Patagonia. They appear to be edging out the Abelisaurids in that region by the end of the cretaceous, not nearly as common the further north you go, however. There must have been some kind of zonal barrier at the time, perhaps to do with climate or environmental factors.
@@paulw6057 The carchs go extinct at the Turonian, many, many millions of years before the Very Bad Day while the abelisaurids make it to the Very Bad Day.
@@FossilCrates I was talking about Megaraptorids. 😄
That makes the paragraph read much clearer. Thanks!!!
This was really interesting to see, Tyrannosaurus Text is my favorite but I have become interested in this group.
I agree! Carcharodontosaurids are some pretty cool beasts. By the way, have you filled out a bracket for our 2022 Chewly Chompionship? You can get the bracket from our website fossilcrates.com. Giganotosaurus is the #2 seed!
@Dan Folkes (paleotologist) Hi! Check out www.PaleoPortals.com/join for out x2/month live paleo Zoom sessions. Email me Brian@FossilCrates.com with any other questions!
tu canal es espectacular, muy buena información.
Muchas gracias!
This is very cool to see people talk about not as know dinosaurs like this!
Thank you for your kind words!
Very cool stuff thanks for the update. Mike
My pleasure!!!
Cool I’m going to be posting a video to my RUclips page as well. Nice job with the video as well, Mike
Thanks! I am eager to see your video!
Got to love these giant mysterious carcharodontosaurids. Does the discovery of the age of this particular meraxes gigas have any wider implications on the life span of giant theropods? Perhaps they live longer than we estimate?
It suggests at least some were capable of living longer, right now I'd say folk would think tyrannosaurid lives were too violent and couldn't get that old, perhaps carchs had a slightly gentler life?
Congrats on 1k subs
Thank you!!!
Great video! I would watch an unlimited number of videos like this. Please consider making more such as ones about both popular and obscure dinosaurs. Thanks so much. P.S. I have the Torvosaurus Fossil Crate and it's one of my most prized possessions.
So glad you love the videos! We are working on more vids of obscure and popular ones :-)
So glad you loved the Torvosaurus crate!!! It is one of my personal favorites too!
know you have already done some short videos on the storage rooms,but id still like to see an extended tour since iv read Jim Jensen's sauropod fossils are stored there and there only a few photos of them...
After visiting my local museum to see the traveling Tyrannosaur family exhibit, I would like to see one for the Carcharodontosaurids one day.
I am glad to hear that as we are working on making one with carchs in it!
The Fernbank Museum? If so, how was the exhibit?
@@gnarkill176 I enjoyed the exhibit. I thought the interactive elements are fun for the kids and even the adults. The skeletons of the various members of the Tyrannosaur family were impressive, which includes Scotty. I felt it was worth the price of admission to Fernbank. There is also a documentary on the dinosaurs found in Antarctica as well.
Meraxes Gigas is now 5,700 kilograms and 11.7 meters long so as long as Tyrannotitan & Acrocanthosaurus.
On the subject of the head size to arm length ratio.... am I missing something? It doesn't feel like a mystery to me. The larger the head, the smaller the arms need to be to help balance the body weight. If they had huge skulls and huge arms, would they not be too front heavy? So one needs to give way for the other.
Idk, I'm not a paleontologist, so it can't possibly be that easy. But that's what keeps going on in my brain.
We have animals like Deinocheirus with big heads and large arms but they aren’t apex carnivores. It was a surprise to find the big head small arms in a third group of large theropods, and in paleo when one finds convergence like this it certainly suggests theropods have in their DNA something that makes this the outcome. Like you suggest, it may be balance related. Or something else. We will keep looking :-)!
@@FossilCrates Ah, yes. I misunderstood you in the video. I thought you said Deinocheirus had a relatively small head (even though I was unsure about that). So then perhaps chasing prey was easier with smaller arms partially for aerodynamic purposes as well as weight distribution purposes? Having the arms smaller, lighter and relatively close to the body while running could help when chasing prey, since the jaws really were the main weapon involved for the kill.
@@alecmcgrathofcanada9175 Makes sense. Another hypothesis I recently heard was the arms were smaller because they lived in family unit and as the size and bite strength increased, having long arms meant risking losing them wild feeding together.
Carcharodontosaurids probably grew slower in a fast changing environment before late cretaceous began. Drought eliminated their food source during the mid cretaceous.
Def could see that ad a possibility
The middle finger of it's feet was larger than the rest so it's assumed that it used it's feet to either kill preys with it's kicks or against rival males during mating season.
From the image in the paper it looks like it is Digit II, not Digit III, which makes it the inside toe claw and not the middle. I added the paper link in the description box.
@@FossilCrates then the media lied to me how could they 😢?
@@demonofreason7574 🤣🤣🤣
@@demonofreason7574 it's okay pal 😞
@@demonofreason7574 I curse you misinformation !
Giganotosaurus: Sonic
Meraxes gigas: Shadow
:-)
@@FossilCrates It gets better.
ruclips.net/channel/UCmf0TdtkQNberHBC7rkDt8gcommunity?lb=UgkxwACdwinKkgMz2x5P7_1quFdrB6qe1o38
Carcharodontosaurus: Knuckles
I dont think its a coincidence that sauropod diversity drops off around the same time.
I think Carcharodontosaurids specialised in sauropods and their demise was the reason. Abelisaurs better generalists wernt affected.
Interesting hypothesis!!!
@@FossilCrates thank you.
@@stephengiles1356 My pleasure!
Well technically because Alamosaurus was the last Titanosaurian sauropod that lived in the late Cretaceous period with the same time period as T. rex but not in the same place
@@memes7317 I believe Sampson and Loewen found Tyrannosaurus in the North Horn Fm of Utah. I have described Alamosaurus from that Formation. I wonder when we will find them at the same locality? That’d be awesome!
I think this dinosaur will be amazing for the next trilogy of the Jurassic franchise
It does look pretty cool!
The new trilogy needs to wait for another 20 years to boot.
@@wikansaktianto9215 🤣
Saurophaganax, Meraxes, Acro or Carcharo
Meraxes is a big Carnivore in Argentina with scary sharp flat knife like teeth Dr. Curtice.
So who would win in a fight? Meraxes or Zuchengtyrannus?
What sized animals?
Zhuchengtyrannus~ 5,870 kgs
Meraxes~ 5,700 kgs
Zhuchengtyrannus wins . It's like T rex vs Giganotosaurus at same size
I noticed that the diversity of carcharodontosaurs are highly concentrated in South America the largest ones are mostly from this continent don't get me wrong carcharodontosaurs were also in Africa (Carcharodontosaurus Eocharcaria ) Asia ( Shaochilong) Europe ( Concavenator) and North America (Siats Acrocathosaurus) but the fact they're so common in South America amazes me is it because of it's location it allowed them to become giants? Why are theses scary huge predators not common in Africa for example maybe they are once scientist will found evidence a lot of questions indeed. The fact Meraxes lived slightly after Giganotosaurus is scary.
I suspect sampling bias in part is to blame and we will find more in Africa and Asia as we locate more sites. It is scary to think Mapusaurus is younger (and larger) than Meraxes. It reminds me of northwestern North America tyrannosaurids diversity-wise.
@@FossilCrates Yeah hopefully they'll find more evidence Carcharodontosaurs are unique creatures that we need to know more about
Don’t forget the ulabegsaurus from Uzbekistan 🇺🇿
@@vahidhosoda6614 However, we know it from a fist-sizedish chunk of right maxilla…
@@vahidhosoda6614 ohh yes you're right!
Have you seen camp Cretaceous season 5 ?
I have not
You know that Carcharodontosaurids is another top favorite group of theropods along with The Tyrannosaurids and I think the reason why the carcharodontosaurids were wiped out because I think those certain type of species couldn’t be able to adapt to a change in the environment which is why Abelisaurids were successful predators.. without large sauropods even medium sized ones the large predator will still be doomed as its primary prey item has disappeared but nonetheless one of the last Abelisaurids lived in the Late Cretaceous period in Morocco but was beloved to have died from the KT extinction event
I like what you wrote but I do have one doubt, that these big theropods hunted large sauropods. As a sauropod researcher that’d be way too dangerous. Far better to eat the small ones and the big size might have been needed to competition for mates?
@@FossilCrates I did forget to mention that they needed to hunt in a pack to take one down because a fully grown Titanosaurian is too dangerous to hunt alone
@@memes7317 We almost never see packs of lions take down an elephant, too risky for the individuals. Even if they hunted in packs, they’d be targeting smaller animals. Titanosaurs likely lived in herds, making it even more dangerous. There is suggestion Mapusaurus may have hunted as a group, or perhaps a family unit.
@@FossilCrates Phil Currie believed that allosauroids were evolved to go after big dinosaurs like the sauropods because of their their teeth which could cut meat from bone and also because they were very active animals which was a must since they would need to eat something as big as a person each and every day just to survive.
@@keerthivasannambiraju955 Hi! Thanks for commenting! One question I always have about that is why would they need to go after big sauropods? That is too dangerous in my opinion. It would make more sense that they were eating smaller, more abundant animals like baby and juvenile sauropods, hypsilophodontids, and the like. Look at large predators today, they almost never go after animals as large, or larger, than them. Even packs of lions steer clear of fully adult elephants unless they are desperate. And sauropods were much larger than elephants. I don't believe sauropods were "walking meat lockers" either, if that were the case then why wouldn't modern sharks swim up to blue whales and take bites from them?
Question do you think this Meraxes Gigas bigger than Scotty The T-Rex?
I do not.
@@FossilCrates oh okay thanks 👍
@@omni-rex7455 Any time!
Fun fact meraxes gigas is the most complete carcharodontosaurid
I did not know that.
@@FossilCratesok did u also know that it’s arms were smaller than a T. rex and it has a sickle toe claw and some say that meraxes used it’s feet to pin it’s prey down and use it’s jaws to finish the job
@@OMNH1188 Cool info! I only know of what I've read in the academic papers and the unpublished photos I have observed from researchers visiting the material.
And also was meraxes found in huincul formation
Wait if this carnivore live up to ~ 46 years can T. rex live the same age Thomas car a well known tyrannosaur expert thinks that Sue (the oldest T. rex) was young when she died this could be evidence that theropod dinosaurs could live longer
Maybe!!!
A new Theropod name after that Game of thrones also Meraxes Gigas Was an easy Name also the head/Skull
I don’t know too much about this animal and I’m pretty sure a lot of people don’t either
I made this video from the only paper that had been published on it. I don't know of any new info on it. Let me know if there is a newer paper!
thanks for the video realy interessting bwe i have biteforce from agrocantosaurus 10 000 newtone and from giganotosaurus carolinie 13.600 newton but i can not finde something charchaodontosaurus except some maximum unrealistic estimates like 30k newtons hahaha
That is because to determine bite force requires specific skull bones from one skull and I suspect we don’t have those for Carch. Great observation!
Personally I dislike the current name, Meraxes Gigas, or Meraxes, sounds less like a dinosaur, and more like a undiscovered Mesopotamian Emperor, and sounds more like an individual to me. Meraxesaurus sounds far better to me personally, cooler too.
And if you think coolness shouldn’t apply to the names of ancient animals, you are never telling me the people who named the Saurophaganax, Tyrannosaurus Rex and Sarcosuchus, didn’t think at some point, ‘yeah that’s a cool name.’
Hahahah! I hear ya! I know for a fact Saurophaganax was thought of as cool, Chure worked to keep as much of its original name, Saurophagas, as he could (it was already taken by a lizard eating bird). I'd like to say I don't have a list of potential dinosaur names for taxa I need to name, that I'd simply select a useful feature (like Triceratops or Stegosaurus or Ankylosaurus, all of their names tell me immediately something about them), but I can't say 🙂
I was thinking more of a Greek leader fighting the Ottomans alongside Thomas Cochrane :P
@@thhseeking I had to look up Cochrane, very cool!! Thank you for commenting!
It is one of the largest but t Rex is simply heavier and bulkier then all the rest making it the biggest,length and height don't determin bigger I could be 176 pounds at 5,5 feet tall and someone beside me is 154 pounds and 7,3 feet tall,height and length don't equels power or mass or being giant
I agree (that's why there are weight classes in most sports :-)).
So titans are carharo, giga,achro and meraxes
I’d call ‘em carchs but def titans! (I study sauropods and my titanosaurs would disagree with any theropod being called a “titan” :-))
@@FossilCrates nice, ur fav is? Mine is diplodocus
@@pekiimatvrdi Supersaurus is mine (but I'm biased and partial). I also love Brachiosaurus and Diplodocus. I'm a "classics" guy at heart 🙂
Who is biggest
Mossasaurus or brachiosaurus...
Who is heaviest carnivorous
TRex or spinosaurus
Who is longest carnivorous dino
Giga or spinosaurus..
Define biggest. Do you mean length or weight? Brachiosaurus wins both.
No one will ever know for sure. However, my money is on T. rex!
No one will ever know this one for sure. I’d say Spinosaurus though.
why Meraxes??!!
What bothers me is the name. It's my opinion, but giving names based on fictitious things from POPULAR culture (not ancient mythology) to a dinosaur annoys me.
But nothing worse than the dinosaur named Thanos. That although they say that perhaps it is based on mythology, it is made clear that it is in the character that they already know what it is.
I understand and don’t disagree per se. Did you know Thanos was named from a subtle bone to boot? :-)
@@FossilCrates
I read on wikipedia (english and spanish) that it was named after the gringo character from marvel.
Or maybe I don't quite understand what you're saying dr. I'm Latina, from Costa Rica, I don't speak English, I use Google's translator 😂
But I love very, very much, the dinosaurs.
@@peque7426 Thanos the dinosaur is only represented by one bone
the giga skull is 1.53 and and more than 1. 60 is oversize because they stretch the skull to get a bigger dinosaur by the spino is the same the skull is 1,6 m long 1,7 m is not currently
You can check out the paper here, it was released on July 7th www.cell.com/current-biology/fulltext/S0960-9822(22)00860-0#gr2
@@FossilCrates thanks
@@rex432m.5 Anytime!
🙂🍀🍀🍀
Thank you!!!!
It's too bad they didn't find any teeth with the skull.
I agree! Maybe some will turn up when they prep the sauropod verts?
I want to find a dinosaur
It is such an amazing feeling to find one! To know you are the first person to lay eyes on an animal that lived millions and millions of years ago is awesome! Keep at it and I'm sure you can become a paleontologist. You can possibly join a local dig to get started.
I don’t think at all that Sue’s skull is the “biggest”.
Correct! I find it interesting that the authors don't address fragmentary large T. rex specimens like Scotty in their fragmentary big skull section. They only address Sue and that is why that is the only one I mention. I definitely would redo that section if I were easily able to, but videos are "locked in stone" 🙂
@@FossilCrates ah okay, great video🤙🏻
@@rodrigopinto6676 Thank you and thanks for commenting!
@@FossilCrates you’re welcome
@@FossilCrates Maybe that is because averaged across all skeletal elements listed by Persons et al., Scotty is like ~1% larger than Sue, so it didn’t really seem worthwhile?
I mean, we can scale up Sue by 1% in our mind to account for that if we want, but for all practical intents and purposes, Sue is only negligibly farther away from being the largest _T. rex_ than it was before Scotty was described, the latter just got way overhyped as some sort of monster outclassing the previous record holders, as seems to be done with every alledged new "biggest theropod".
Also, the second _Giganotosaurus_ (despite also being way overhyped when it was first publicised) also keeps getting ignored in these sorts of comparisons, despite that specimen being described as 8% larger than the holotype (though granted, that measurement has justifyably been called into question…albeit by a bunch of people who have never seen the actual bones or taken any measurements of them).
nope sue skull is 152 cm and scotty skull is 161 cm
Their paper (check the link in my response to another person on this page) states 140cm for Sue. Interesting that, if your numbers are true (can you provide me a peer-reviewed source for your numbers?), they skipped a giant specimen in Scotty and may have undersold Sue? Def please provide me sources from the academic literature with measurements. Thank you for your comment!
@@FossilCrates you only have to enter sue skull size 99.9 percent of the entries are 150 cm and with scotty skull size you have to go to reconstructions of scotty
@@rex432m.5 I also know websites copy one another and that when I started in paleo Ultrasaurus was listed as the world’s heaviest dinosaur. Just because it is common doesn’t make it correct. I was hoping you could point me to a paper where a paleontologist measured the original skull. I will do some digging!
I found the source they used: Brochu C.A.
Osteology of Tyrannosaurus rex: insights from a nearly complete skeleton and high-resolution computed tomographic analysis of the skull.
J. Vertebr. Paleontol. 2003; 22: 1-138
@@rex432m.5 I found the measurements! length, tip of snout to back of left quadratojugal 140.7 cm
length, tip of snout to back of right quadratojugal 138.0 cm These are from Brochu 2003, a person that actually studied and then scanned it. I would consider these to be "official" numbers. Anything that says 150 cm isn't looking at the original fossil, or is a typo, or is from a different specimen. The Meraxes paper doesn't use other Trex skulls I suspect because they aren't as complete, I don't think Scotty's skull is even 70% complete, which means there is certainly doubt on its total length.
The skull of tyran length is 140 cm, giga is 169 cm, cardo is 160 cm, and Spinosaurus is 175, and he says that tyran has a large skull, 🤣🤣🤣, in fact, it is a large skull, but it is the smallest among giants
One item of note is that the T. rex skull is *heavily* built compared to the veritable flyweight Spinosaurus (all slender snout). The Giganotosaurus and Carcharodontosaurus skull bones aren't as massive either. Holding the skull bones in one's hand showcases how robust the massive Tyrannosaurus is. The others are big for sure, and I am loathed to use the term gracile here, but they aren't as robust in construction. This makes sense as they were eating different prey in different fashions. Thanks for commenting!!!
@@FossilCrates Who has a heavier skull Spinosaurus or tyran
@@Dinosaurssongs Tyrannosaurus. Spinosaurus, with those long gharial-like dentaries and maxilla, is a lightly built skull inc comparison to the massive bone-cruncher that is T. rex.
@@FossilCrates You mean the tyran skull is heavier yes or no, the answers no
@@Dinosaurssongs Keep in mind we do not have a complete Spino skull. The one we created is via upsizing a number of disparate parts to reflect what we believe this skull would look like. So there is no way to answer that question with actual bone to bone comparison. Comparing the casts, though, the T. rex skull would be heavier.