Meraxes gigas, The Most Complete Carcharodontosaur
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- Опубліковано 11 лип 2022
- Meraxes gigas is the most complete carchardontosaur found yet, and it really helps to show a lot of important features about the group, their evolution, and how successful they were before the latest Cretaceous.
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Its good to see Carhcarodontosaurs finally receiving deserved attention!
It's also just super nice to have one which is relatively complete too.
@@RaptorChatter indeed it is
It’s nice to see dinosaurs like Meraxes gigas getting their well deserved attention!
I'm really enjoying your videos these days! They're very informative, and you do a great job of communicating the concepts. Thanks for all that you do to make paleontology more equitable and accessible.
You're welcome and thanks for the compliments! Making the field easier to get into and stay up to date with was always one of my main goals, so good to hear that I'm doing that!
In a nutshell: Merexas is a blessing to the Carchardontosaur group,and is just another cooler new dinosaur to add to the Paleontology collection
Good video would watch again,and I wish y'all are having a great day
Could you cover the larger South American/ oceanic pterosaurs (eg: tupuaxara, thallasodromeus or stuff like tropeognathus?)Thanks
That shrink wrapped art is too creepy man. I hope somebody draws a new one soon
There's a few other examples which are already out there, but this is what came with the press release
2:46/2:55 I did mentioned on your Ulughbegsaurus vid that the Carcharodontosaurs most likely became extinct around the time of the Cenomanian-Turonian Anoxic Event (despite it primarily affecting marine life), between 95 & 90 MYA.
Although is Unquillosaurus ceibalii considered to be a later member of the group based on a 2012 article?
Unquillosaurus is so partial that it's not reasonable to claim it belongs to any specific group. As for the anoxic event it and the clamate change at the same time may very well have been the reason for their extinction, but it's really hard to say that for sure, so it's possible, but just unclear right now how much of an impact it had.
Now would Meraxes and Mapusaurus live at slightly different times between the Mid/Late Ceromanian and Turonian or would they have to find ways to live with each other without going into intense competition?
I also somewhat apply this to both Giganotosaurus & Tyrannotitan because of how I place the timespan of the Mid-Cretaceous. Between the Aptian Extinction & the Cenomanian-Turonian Anoxic Event (115 & 125 - 100 & 95/90 MYA).
Based on what we have they lived at slightly different times in the formation. Meraxes was found in the lower portion, and Mapusaurus has only been found in the upper part of the formation.
hmm, perhaps I'm just crazy, but the thing that stood out to me as of maximum interest was the age of the Meraxes specimen at death/the rate at which it matured. Actually having arms & actually having a skull, are, of course, very much awesome things...we all likely are way too comfortable with our made up dinos (which is quite a bit/% of many of them)
Can you imagine if they find a complete carnivore fossil and its nothing like they assumed with the made up fossils? i know for sure theres more to it than meets the eye.
I found out about meraxes yesterday so its amazing to have a video on it
Musta been really cold water for even the arms to shrink lmfao
Great video
I'm guessing a massive head full of teeth does everything arms would need to do. Infact if I envisage these animals with long arms they seem out of balance.
As always very interesting, thank you
Most likely that is the case. If the jaws can do the job there's not really as much reason for them to need large arms.
They're in the same boat as flightless birds, or any birds really that are on the ground.
It seems really weird (to me at least) not to use arms given how dependent we are on them but plenty of things do.
Interestingly, they did have extremely muscular arms, so they arent wholly vestigial, they were still using them for something. Perhaps for mating.
It should be noted that modern predatory birds also follow this plan of larger bodies, larger heads, stronger legs with long talons, and oddly, no wing claws. Other bird groups including waterfowl did retain wing claws. So a goose has claws on its wings, but an eagle doesnt!
Whoa I didn't know it had an enlarged second toe! 🤔
Yeah, it's a bit odd, but we often don't get well preserved feet, so maybe the others had something similar too!
this is just my theory so more like a speculation, but perhaps the bigger toe claw shows it ate smaller prey than what other carcharodontosaurids ate because it could of use it to pin its prey to the ground better so sauropods were probably not in its diet but mid to small dinosaurs were, I imagine it living like a huge predatory bird as birds like eagles and owls also do this with their claws, so they might have co-existed from this niche partitioning with other carcharodontosaurids, but again its just a theory on my part so feel free to disprove what I think.
Most complete carcharodontosaurid from Gondwana perhaps, but for completeness Concavenator is way ahead in the lead.
Giant flightless birds.
Can you make a video about tauroventor cause I know nothing about it other than its name.
Was this dinosaur named after Rhaenys Targaryen's dragon, from the ASOIAF universe? Because, if so, it was an awesome choice!!!! Here's looking forward to the species Balerion and Vhagar :D
Yes it was.
How come you have a "friendly" spell-checker? Mine hates me!
Does the small arms rule apply to megaoptors?
They are the only exception, and so far we haven't found very complete, very large ones. They definitely got big, but not as large as these other groups as far as we know. So maybe there is a size limit which causes the large theropods to trend towards having small limbs, and the megaraptorans just hadn't reached it, or maybe it's something unique to how they were living. Right now it's really hard to know with how partial most megaraptorans are.
Non si possono aggiungere le traduzioni automatiche in altre lingue?
It's more automatic, but if we get big enough I'd love to be able to pay to get it translated, we just don't have that ability right now.
Oh i thought its a new villain for an jurassic world movie in furture but ok.
Had the asteroid not arrived, it looks as if they'd have carried on evolving until they had no arms at all. Clearly they were becoming vestigial at this point.
I don't think so as far as im aware they had pretty long arms when they were young but once adults they relied more in their jaws than the arms
At least in abelisaurs they may have been getting there. In tyrannosaurs the muscles were still pretty strong, so may have been more useful.
Question
Do you think this carnivore is stronger or bigger than the tyrannosaurus Rex?
I know next to nothing when it comes to taxonomy so there's probably a simple answer to this. Wouldn't a number of creatures adapting in the same way without common ancestors, especially when several creatures do this, be a possible hint that we might the taxonomy incorrect and that those creatures are closer related than we might think?
I find it easy to think of convergent evolution when a smaller number of species find that path, the more species that do it I find it harder to follow. Maybe some all-invasive environmental change that affects all of those species in the same way and that they all landed on the same solution?
You are seeing a general body plan and a handful of superficial features and wanting to group them together with other animals with those superficial features. This would be like putting sharks and ichthyosaurs and dolphins all together in the same group because they share a general body plan and features. The simple answer is that similar environmental pressures are resulting in a similar body plan and superficial features in loosely related species. Even in modern birds we see larger bodies, with larger heads and stronger legs with dangerous claws as features of predatory species. So the pressures resulting in this body plan are not even unique to the Cretateous.
These days dinosaur phylogenetics is done using thousands of tiny features in hundreds of bones. That is how they can find small fragments of an animal and generally know what it is. So all of those tiny features together is what gives us this grouping. As mentioned in the video, physical location also helps to confirm the phylogeny. Because we know that animals evolved in isolation on different continents.
No one knows how this creatures really were, or if their fossils are even built right since the majority are just made up. Unless we have a time machine, i wont believe what scientists say, they're very deceptive.
It could be, but the number of other features help to show it isn't. Modern matrices for testing relationships rely on hundreds of features and often over a hundred fossil animals, so the trend in arm size does seem independent.
Oh! there's a rounded form on the anterior squemocillcellcellcell, on the upper jugularattele post posterior bibbely bobbely boink bone - you do realise, it would be more helpful, and you could show off more, if you explained what and where these formations were.
He’s not trying to show off. Yes it might be more helpful to some if he did, but there are videos on youtube about the anatomy of dinosaurs, he doesn’t have to explain it for everyone🤷🏼♂️