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Meraxes - The Sickle-Clawed Carcharodontosaur

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Large, imposing and dominant, Carcharodontosaurids dominated Southern hemisphere environments throughout the early through mid cretaceous, although much about them is little known, both due to their general tendency to be fragmentary, with some exceptions here and there, or poor descriptions cough cough Giganotosaurus. Therefore, finding more of their remains is key in understanding more about them, and thankfully, that has been the case with a new description of a new taxon hailing from the Huincul Formation of Argentina. I hope you enjoy.
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Опубликовано:

31 авг 2022

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Комментарии : 111

@GeorgeTheDinoGuy Год назад

Weird to think Carcharodontosauridae has such a slow growth rate, I wonder if similar to Australia’s Dromornis their growth rate was one of the reasons later Carcharodontosaurs went extinct 🤔

@bkjeong4302 Год назад

We already kind of know what happened to the carcharodontosaurs: they took a massive hit during the Cenomanian-Turonian Boundary Event and never recovered in either diversity or body size.

@GeorgeTheDinoGuy Год назад

@@bkjeong4302 I’m aware, but I’m speculating that perhaps their growth rate and sexual maturity was relevant to their downfall similarly to how members of Dromornithidae survived onwards until 20 thousand years ago.

@HenrythePaleoGuy Год назад

Potentially. Could potentially have been an influence, but we just need to do some research to find out some more.

@GeorgeTheDinoGuy Год назад

@@HenrythePaleoGuy yeah, I really think it would be cool to see a study on sexual maturity in dinosaurs, how it might affect their extinction and success.

@rileyernst9086 Год назад

@@bkjeong4302 i personally think that they went extinct during the cenomanian-turonian boundry. The teeth we have afterwards are not necessarily distinct enough to be identified as those of carcharodontosaurs and can eaily be disputed as to being from abelisaurs and megaraptorans, which i would attribute them to until we get solid evidence otherwise. Although the idea of large sized carchs holding on bitterly to the position of dominant South American predator to the end is quite appealing to me.

@f.u.m.o.5669 Год назад

I thought I was the only one who noticed it's dromaeosaur-like foot claw

@velociraptormongoliensis7509 Год назад

The increased skull size and arm reduction is also seen in terror birds.

@HenrythePaleoGuy Год назад

That too!

@jass9571 Год назад

And kiwis 🥝

@gregorysaugustine5236 Год назад

It is seems to be the trends. The bigger and more used the head is, the smaller the hands/wings become.

@MaryAnnNytowl Год назад

Pretty impressive that they got such a full skeleton out from under that thick slab of stone without just having to bust it out! Thanks for yet another interesting video, so here's a like and comment for the Almighty Algorithm!

@HenrythePaleoGuy Год назад

Indeed! It's astounding how efficient and precise paleontologists can be! Thank you for the algorithm help! This reply should help as well. :)

@rileyernst9086 Год назад

Having looked at the pictures I'd say its toe claw is much more like an eagle talon than a dromeosaurian 'sickle'. A more raptorial gripping and penetratingclaw than than the flattened sickle(which to me seems to be more of a cutter, like a sickle.) I also find the orientation of the teeth at the tip of the maxila as fascinating. They are cutting teeth and even the teeth at the front of the jaw are going to be drawn across the meat like duble edged steak knives.

@santiagofernandez8551 Год назад

Currently meraxes its almost as big as acro with almost 12 m long and weighting near 6 tons

@joshuaW5621 Год назад

I heard of this new carcharodontosaurid but today is my first time hearing the name Meraxes.

@HenrythePaleoGuy Год назад

It certainly stands out!

@The_PokeSaurus Год назад

Although I disagree with the current idea of Tyrannosaurus ontogeny, I do find its differences from Carcharodontosaurid aging very interesting. Also, it's amazing to finally find a Carcharodontosaurid with most of the skull finally!

@HenrythePaleoGuy Год назад

Definitely! A lot to consider with that. The age ranges is very cool. Would've been out there hunting for a good length of time! Nice to see how its completeness has helped with filling in the gaps with Giganotosaurus.

@The_PokeSaurus Год назад

@@HenrythePaleoGuy Gap filling for related dinosaurs is always awesome! The age range reminds me of elephants, and they are a similar size.

@darklighttwins2776 Год назад

I can’t find the Dan folkes picture that you showed in the beginning with the lineup of carcharodontosaurid skulls anywhere online.

@Alberad08 Год назад

Pretty interesting news! As always, thank you very much for sharing.

@Alberad08 Год назад

BTW as you said, "Large, imposing and dominant, Carcharodontosaurids dominated Southern hemisphere environments throughout the early through mid cretaceous." I have no idea what animals filled their niche when they where gone - off course there where the smaller Abelisauridae, but they played in another ballpark - didn't they?

@HenrythePaleoGuy Год назад

Many thanks! Abelisauridae took up a good many of their niches after they declined and disappeared from the fossil record, although they didn't have too much time to really get to their level of size because of the extinction event. There are some very big ones currently in description limbo, such as the Kenyan abelisaur, so hopefully we get some more clarification on them shortly.

@josecortes5802 Год назад

Is it true that Meraxes could have coexisted with Mapusaurus? While both carcharodontosaurids are from the same formation, Meraxes was apparently found in lower, older layers while Mapusaurus and most of the Huncul species were found in the upper layers. However, some artists have speculated they might have coexisted (perhaps briefly?) because their fossils are only known from specific bonebeds or places. If so, it would interesting how apex carcharodontosaurids could have coexisted, along with the many medium sized theropods such as Gualicho, Skorpiovenator, Ilokesia and more.

@HenrythePaleoGuy Год назад

There could well have been some overlap, although the time gap and geological layering means it's unlikely. Certainly cool to think about!

@williamjordan5554 Год назад

Perhaps one is the ancestor of the other.

@datmedetbek5165 Год назад

@@williamjordan5554 No Meraxes is too basal to be considered as Mapusaurus ancestor

@ironcarnage1019 Год назад

There'd probably be quite a decent amount of competition between the two if they did coexist, unless they had different niches in the same ecosystem of course

@Ozraptor4 Год назад

Given that Meraxes diverged before the common ancestor of the earlier Giganotosaurus + later Mapusaurus, then the direct ancestors of Mapusaurus roseae must have lived in South America at the same time as Meraxes.

@efrainoctavio3506 Год назад

I know Gustavo Monroy, I'm actually eating pizza with him right now. I saw the miniatura of the video and clicked on to see if one of his illustrations was here and it was the fucking first one lol

@theprehistorichubert9448 Год назад

maybe the large claw was also used to help them with running ( like the non-retractable claws of a cheetah), or to help them move around in different terrain

@HenrythePaleoGuy Год назад

Another good explanation, although you'd expect the other claws to be a similar length, typically.

@theprehistorichubert9448 Год назад

@@HenrythePaleoGuy true, you have a good point, but it's still very plausible ( especially when you consider the fact that evolution loves doing wierd and "unnecessary" shit even if the original purpose of some body part is simple, which might be the case here. And the fact that only one claw displays this enlargement wloud still make it a good tool to help it chase down prey

@purplehaze2358 Год назад

I’m not entirely sure how to feel about the fact that this thing’s name is in reference to a dragon from _A Song Of Ice And Fire._

@HenrythePaleoGuy Год назад

It's most definitely less cringey than Thanos, which was named due to the current top thing, and was even more unusual given it was given to such a fragmentary animal. Meraxes is not as well known, being not only a cooler name, but is assigned to a well preserved animal. Helps the name isn't the most commonly heard.

@KhanMann66 Год назад

I see nothing wrong. We even name a dromeosaur after the Greek hero Achilles.

@TheHortoman Год назад

@@KhanMann66 the difference is game of thrones is shit and cringe

@mako7710 Год назад

House Targaryen!!!!

@demoths Год назад

Better than naming a tyrannosaurus "Stan" if you ask me

@minted1841 Год назад

Well done. Fascinating :)

@HenrythePaleoGuy Год назад

Glad you enjoyed it!

@rickharold7884 Год назад

Fascinating

@HenrythePaleoGuy Год назад

Definitely, Rick! Goes to show there's still a ton out there!

@rileyernst9086 Год назад

Great video as always👍i think its about time we got a reasonably complete large carcharodontosaur from the midd Cretaceous!

@HenrythePaleoGuy Год назад

Sure was! And thanks! Takes a lot of time to describe these guys.

@johnelliott7850 Год назад

The slower growth rate estimates currently out there kind of chime more with my expectations BEFORE I read one or two dinosaur books written by authors (on a mission) in the 1990s.

@kuitaranheatmorus9932 Год назад

Meraxes is cool and so was this video

@HenrythePaleoGuy Год назад

Thank you! Much appreciated. :)

@oleandreasjensen5263 Год назад

Exellent story and video.

@HenrythePaleoGuy Год назад

Many thanks! Love making these kinds of videos. :)

@oleandreasjensen5263 Год назад

@@HenrythePaleoGuy You are very professional and I am very thankful for for your videos. Best greetings from Norway : )

@PPaleoartist Год назад

thank you for the feature!

@HenrythePaleoGuy Год назад

My pleasure! :D

@maozilla9149 Год назад

great video

@HenrythePaleoGuy Год назад

Many thanks! :)

@maozilla9149 Год назад

@@HenrythePaleoGuy your welcome

@ceruleanclouds5871 Год назад

Thank you

@mikefraley6935 11 месяцев назад

Had to slow down the playback to 75% to understand most of this, but good info.

@nicolasnozuki4311 Год назад

Meraxes's claw makes me wonder if other Carcharodontosaurids also have the sickle-claw on their foot.

@HenrythePaleoGuy Год назад

I've seen some recent skeletals, Giga as an example where it's incorporated, although given its so far only been found in this animal, I'd reserve not giving it to other animals for the moment, although it can be reasonable to assume.

@nicolasnozuki4311 Год назад

@@HenrythePaleoGuy Since Meraxes is closely related to Giga and Mapu and Tyrannotitan. I think maybe three of them may have the sickle-claw while other member may not have it.

@indyreno2933 Год назад

Can you do a video on the saola?

@HenrythePaleoGuy Год назад

I've got that marked down in my notes, so I'll be getting around to it eventually. :)

@bestomator6568 Год назад

This really bothers, in its description paper, out of all the interesting or fascinating things about it, why the hell, did the author put so much importance on its small arms?

@a.randomjack6661 Год назад

Probably because it matters to specialists in that field?

@bkjeong4302 Год назад

Yeah the most interesting parts of this animal weren’t mentioned in any news report.

@HenrythePaleoGuy Год назад

Helps in getting closer to answering some long-standing questions regarding their function and how they come about, so that's neat.

@Ozraptor4 Год назад

When publishing in higher-impact scientific journals, the editors and reviewers require the manuscript to provide a major scientific breakthrough. Something that significantly enhances our understanding in the given scientific field. A simple description of a single new genus of carcharodontosaur is insignificant, and would be referred to a lower impact journal. A discovery which helps to map the reduction of forelimbs in the evolution of multiple lineages is considered important. Thus the authors need to “pimp up” their papers by focusing on how their data feeds into existing or novel hypotheses.

@bkjeong4302 Год назад

You have to wonder how Meraxes used those claws, especially because I doubt this thing (or larger theropods in general would restrict itself to hatchlings or small juveniles as an adult-it would likely be preying on larger juveniles and subadult sauropods quite often, and against prey that size pinning wouldn’t be all that useful. It’s also noteworthy that Digit II has been weaponized multiple times in theropods as a kicking weapon, stabbing/grappling implement, or both (Meraxes, paravians and especially the eudromaeosaurs, seriemas, phorusrhacids, tyrannosaurids, Australovenator, and cassowaries off the top of my head), and their functions vary from kicking (cassowaries, likely Australovenator and tyrannosaurids) to pinning down small prey (most paravians, seriemas, small phorusrhacids) to grappling with relatively large prey (eudromaeosaurs, larger phorusrhacids and possibly tyrannosaurids).

@HenrythePaleoGuy Год назад

Definitely! Pinning down prey to perhaps even intraspecific competition could also be at play. Worth checking out some more.

@rodrigoestebanquierofiguer9658 Год назад

your biggest mistake and the biggest giga is the world south america that your fans t rex sick, t rex smaller

@datmedetbek5165 Год назад

@@rodrigoestebanquierofiguer9658 Tyrannosaurus rex was larger in terms of mass and probably taller, the only dimension where Giganotosaurus might have surpassed Tyrannosaurus was length. And even in this measurement both species were pretty close to each other.

@rodrigoestebanquierofiguer9658 Год назад

@@datmedetbek5165 your sick 🤫🥱🥱giga biggest 🤴 🤫 you fans T. rex ass hhahaha

@datmedetbek5165 Год назад

@@rodrigoestebanquierofiguer9658 False, you are the one who is sick and delusional.

@matthewwelsh294 Год назад

Do a video about the extinct saber teeth salmon

@HenrythePaleoGuy Год назад

Which genus? I believe you're referring to Oncorhynchus?

@matthewwelsh294 Год назад

@@HenrythePaleoGuy That might be the one

@matthewwelsh294 Год назад

@@HenrythePaleoGuy Oncorhynchus rastrosus

@sussygojira4121 Год назад

2012 was when my sis was born...

@HenrythePaleoGuy Год назад

Well, that makes me feel older, haha. Goes to show how long it can take to prepare these kinds of finds.

@edmiwaman8922 Год назад

Hello

@HenrythePaleoGuy Год назад

Hello there!

@abdulazizrex Год назад

I never heard of a dinosaur called torivenator?

@Siamotitan678 13 дней назад

You mean Taurovenator

@dragonfox2.058 Год назад

Increasingly convinced the arms were part of sexual display. It just makes sense. The artists need to start putting more feathers on these beasts

@iksarguards Год назад

Imagine explaining these pop culture names to people a century from now.

@HenrythePaleoGuy Год назад

That's sure going to be a fun time, haha.

@drnox8268 Год назад

10/10 for speed reading, 2/10 for comprehension …

@jbenjamingrimm75 Год назад

Slow down when you talk in your videos and enunciate more, I can absorb like a fourth of what you’re saying

@HenrythePaleoGuy Год назад

There is definitely a lot going on. Will try and space some of it out more.

@Sarkozuhus Год назад

This mindless Reddit fashion of giving theropods bear lips is just disgusting.

@HenrythePaleoGuy Год назад

On which image/images?

@Sarkozuhus Год назад

@@HenrythePaleoGuy Almost any. Literally from the very first frame.

@okeefenokeetheseventeenth2200 Год назад

As interesting all these illustrations and the animals featured in your videos are, in my perception your explanations degrade very unfortunately to the most part to an accompanying background noise due to the high speed in which you are talking. My brain just cannot work out your verbal output fast enough, and so what may be valuable information is lost as much of it is perceived as noise. I really wished you could explain at a slightly lower speaking speed. Not all of your audience are native English speakers. Your speaking speed is, however, the only problem of your interesting videos, besides that the videos are excellent.

@HenrythePaleoGuy Год назад

I'll aim to slow them down a little in the future. Stay tuned for more! :)

@okeefenokeetheseventeenth2200 Год назад

@@HenrythePaleoGuy Yes, of course I will. The videos are all very good. 🙂