Abelisaurs: Gondwanan Success Story
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- Опубліковано 24 лип 2024
- Abelisaurids were a successful lineage of mostly Gondwanan Theropod Dinosaurs, first appearing in the Middle Jurassic and persisting until the very end of the Cretaceous. These were distinctive looking animals, defined by their blunt, bulldog-like skulls, tiny forelimbs and heavily ornamented heads. With powerful deep jaws, Abelisaurs were proficient hunters of the Titanosaurian Sauropods with which they shared their environment. Interestingly, Abelisaurs were also present in Cretaceous Europe, where they became apex predators in the absence of Tyrannosaurids. Most genera have been recovered from South America, although important finds have also stemmed from Africa, Madagascar and India.
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Abelisaurs! Rulers of the southern world. They were dominant at the end of the cretaceous. I have always been fascinated by abelisaurs. Awesome video!
Great to hear it!
The most intriguing thing I fond about abelisaurids is whether they became the apex predators of the South America since Allosaurids (Giganotosaurus, Mapusaurus etc) had gone extinct in the middle of the Cretaceous. Pycnemosaurus may present some evidence to it.
It's also interesting that European abelisaurids didn't shrink as most of the fauna did, maybe in their case being bigger and bulkier was better? It would be a rare case where the predators are the biggest species in the ecosystem, something unknown to the Earth since, if I recall correctly, the Paleozoic
Thank you for translating your measurements from the metric. We didn't spend much time on the metric system when I was growing up in my American school, so I get confused now. (I'm 65.)
I have been enjoying your shows a great deal. Thank you for sharing your work.
I've found weight is roughly doubled from kg to lb and one meter is a little over a yard. Hope this helps, or at least you learned something!
I help you somewhat, a pine is half a kilogram, a foot is 30 centimeters with 100 centimeters being a meter, I hope that helps
Basically Abeliosaur where cool speedy sauage bois.
You’re right, they are quite sausage-like!
Not all were speedy tho, some were huge and fat and chunky
@@dr.polaris6423 also Adult Pycno has been estimated to be 11 meters at most
Heh
@@dr.polaris6423 would you agree with me that they would have been out competed by the tyrannosaurs if they had invaded there territory of the southern continents
My wife calls me a bellysaurus.
Oh my God, this pun! My dad made these kinds of puns when I was a kid. This is a great one.
Was that after you made the beerasaurus extinct?
😂👍
So she basically calls you fat 😢
every abelisaurid is permanently stuck naruto running
Game theory: Carnotaurus evolved to be faster because it seems that some saurolophines migrated to South America i.e (Bonapartesaurus like animals), so Carnotaurus was the southern equivalent of albertosaurinae.
edit: "it seems" because most south american hadrosaurids are either dubious or invalid taxa
I wonder if they lived in Antarctica and Australia? It's sad that these continents are either not good at making fossils or the conditions are tough for digs.
Megaraptorids seem to have been Australia's only large theropods from the Aptian-Turonian.
@@Ozraptor4 Perhaps abelisaurs made it there by the Coniacian?
Ozraptor is a possible Australian albelisaur but we’re still not sure if it’s a albelisaur or a noasaur we only have a ankle bone so it’s all guesses
@@mralmond693 Perhaps Noasaurids in the absence of their larger cousins grew to large sizes and were large predators alongside Megaraptorans, only more fossils would tell.
Australia actually has the oldest hunting foot prints of Dinosaurs.
Awesome video dude, it’s awesome to hear an entire group of prehistoric animals.
Abelisaurs are known for have those short stubbed limbs, and skulls correct? It makes them unique, which is why I love them
They certainly are unique animals.
Interesting that most larger predators of the time were stocky, ambush hunters, even though they had cursorial adaptations. Cursoriality took off with boreioeutherian placental mammals at the second half of the Cenozoic.
13:40 I wonder if it needed to be fast to be able to outrun Mapusaurus which might have seen a large Abelisaurid as a competitor...
Have other fossils of Pycnonemosaurus been found yet? I ask because the genus was just added to the video game Path of Titans, and it was given a pair of Carnotaurus horns. A stylistic and speculative design choice, but it does serve as a reminder that it's a Carnotaurine
It's interesting that they are known from the southern hemisphere but not Australia
also could Thanos snap his fingers?
Megaraptorans seem to have been Australia's dominant Cretaceous Theropods instead and Thanos could certainly not have snapped it's stubby useless fingers!
@@dr.polaris6423 Abelisaurs would've made Late Cretaceous Australia even more dangerous! XvD
@@Grant_Scarboro and yet not as dangerous as what's there now.
@@dr.polaris6423 than how did all of the non avian dinosaurs go extinct?
There are Australian abelesaurids!
Why Good day to you too my good sir I also honestly love fact, you’ve talked about pretty much. Talked about every currently known genus of abelisaurid and I absolutely love it.
Love that intro
Thanks, glad you like it!
Thank you very much. I learned quite a bit about these.
Excellent and fascinating video, Many thanks Dr
I wonder if there was not KT extinction event... would Abelisaurids evolve into gigantic armless killing machines with just a massive powerful jaw and fast long legs?
They were that already.
@@majungasaurusaaaa But the size of giant Carcharodontosaurids and Tyrranosaurids and with completely internal arms like the Moas.
Imagine if the future of carnivorous dinosaurs were chunky sausages with eventually no arms. Just angry killer reptilian blimps.
oh damn my art is in this video 😳 great one as always!
Great video, and info, Thank you for sharing : )
They are the Dinosaurian version of pitbulls
That’s a good way of putting it!
I hope the giant Turkana Grits Abelisaurid gets more material and an official description one day, who knows maybe it could reach 12 meters and 6,5 tons max?
Don't know why i always love these guys
They just have this endearing underdog energy
Nice channel, are you interested in a collaboration?
Nice to see you here.
Thank you for including Imperial measurements!
Great video
Yoo 3.1k congrats bro!
Thanks pal!
@@dr.polaris6423 been here since 1.5k and plan on staying :)
@@arcosprey4811 :)
@ 14:57
And also make them the undisputed winners of the coveted title of "fugliest theropod"
Love them anyway!
Isn't that the word of warcraft battle for azeroth Zul'dazar soundtrack in the background? nice one :)
Making fun of his arms would be pretty abelist
You should put a name of the artist on the image you're using. Anyways great video and I found a hidden gem on UA-cam.
With over 100 images in some videos, many of which have no attached credit to the creator, that suggestion is totally unrealistic.
I feel like the music used here is edited from WoW. I love it.
Those tiny large pupper-sized theropods were adorable
I love this chanbel
The Tyrannosaurus of the Southern Hemisphere.
The undescribed giant Turkana Grits Abelisaur Dr.Polaris briefly mentioned could have been as large or perhaps larher than Tarbosaurus as far as we know.
Please make a video on the Noasaurs
That cladogram towards the start of the video is incorrect, it mixes up the dinosaurs from India vs those found in Madagasgar (Pink and Grey are interchanged). For example, Rajasaurus and even Indosaurus are listed as being from Madagasgar while Mahjungasaurus is shown as being from India.
The holotype of Spectrovenator is considered a young. So it's so little because is not adult.
Abelisaurs have some of the most deceptively cute sounding names
Oh yeah, like the Skorpiovenator, Ekrixinatosaurus, Xenotarsosaurus, Spectrovenator, Kurupi, Thanos or Pycnonemosaurus, very cute🥰
@@Sun-God2 🙄 a belly saur. If you're gonna correct me, at least know what I'm talking about beforehand
Do we have any clue how the ceratosaurids spread and evolved into the abelisaurs? Or is the fossil gap too large to tell?
They must have been quite a sight when running at top speed.
They were the three stooges of their time at 12:46.
Why did abelisaurs have such large shoulderblades, whe they had so smaar arms?
Modern birds with heavily reduced forelimbs, such as emus, still have quite large shoulder blades as well.
@@dr.polaris6423 Neat What do they yse them for?
@@esbendit I don't think anyone really knows for sure, but probably for some sort of display or sexual signalling.
@@dr.polaris6423 Oh, I thought the reason for it was to power their neck muscles. Also, do you think that Spectrovenator was fluffy?
@@dr.masiaka7048 probably not, Ceratosaurus is known to have been fully scaly and it is one of the most basal member of the lineage where Abelisauria comes from, not to mention the fact that there's evidence of Carnotaurus also being fully scaly, and abelisaur osteoderms.
"CeRaToSaUr BaD! CaRnOsAur GoOd!" - Every paleo doc
And yet they Pormote a Coelurosaur like a mad man without knowing it.
@@MrEmilable are you talking about Trex?
@@user-mp8wy8lp4y Yes
@@MrEmilable well to be fair people didn't know Trex was a coelurosaur at the time, because at the time people thought only small theropods were coelurosaurs
@@user-mp8wy8lp4y Yeah that´s ture but,
Also the what i said, they were glorifying a Coelurosaur without knowing it.
Fast leggy sausages.
:)
I like Abelisaurs.
So Tyrannosaride was not as wide spread as Abelisauroid back in the late creataceous? Also I thought there were some Europe Tyrannosaur?
there were european tyrannosauroids. not tyrannosaurids
@@alcyon7536 oh ok, thank you for clarify the problem. I am not very good at renembering names.
@@leoornstein3963 but I'm pretty sure they didn't survive to the late cretaceous, although there is a primitive Asian Tyrannosauroids that lived really close to europe so they might've made gone there not to mention the fact a bunch of Asian lineages of dinosaurs moved to europe by the end of the cretaceous, basal Lambeosaurines, Tsintaosaurini and protoceratopsidae (Ajkaceratops).
0:16
Who's the artist?
Abelisaurs seem roughly analogous to ground storks given liscence to dominate
We are all Ogs we were here before polaris blew up.
1:15 WHAT?!?! How is that undesceibed?!?!?!?! Scientists get in that now,
My thoughts exactly!
Where the cainasaurous at?
She calls me a late night Asaurus 🙃
Flightless birds
(Mynas Gerays) 3:00 I Love hearing english speaking people trying to pronounce words in portuguese. It's just so god-damn funny to hear it.
How is it supposed to be pronounced?
@@dr.polaris6423 you actually said it right. It just sounds so funny for a brazilian like me to hear foreign people say a language they have never said it before. The pronunciation just sounds funny.
@@ermac3530 What makes you think he had not previously "said it", ?
Happy to see indian theropods in a highly successful lineage
:)
The era of prehistory are the closest humans will come to seeing alien lifeforms?
2021🎉🎊🎊🎊🎊🎊🎊
Life is too short to worry about what others think. Do whatever you have to do, and do it for you.
Marry me, oh man of wisdom.
You forgot Kurupi itaata
Spectrovenator = Yoshi
Though, i suggest we change the name of dinosaurs into dragons. I mean, look at them, they're what ancient humans called dragons, basically. Probably from seeing their fossils
The tyrannosaurs would have drove the abelisaurs to extinction if the tyrannosaurs had invaded the southern continents
Not really, Abelisaurids were far better Sauropod hunters so they could have partitioned niches.
No talk about the "controversial" first member of the group, the problematic Abelisaurus what is considered by Lamanna et al. to be a Carcharodontosaurid.
Or or hear me out the single horn made him feel like a pwettty unicorn...
Ok
So they got stamina better than a trex, huh
Short burst speed for sure in these case of Carnotaurus and friends. Long distance maybe not. Tyrannosaurids too had great adaptations for being cursorial. Both Abelisaurids and Tyrannosaurids outlocomoted Carchs.
@@majungasaurusaaaa Not really.
@@eybaza6018 Care to elaborate?
@@AncientCreature-i2o No, i don't.
It looks like a carno
The majongasaurus should be fast tho no? Considering the tailbones??
I came here for the dinosaur, I'll stay here for the red panda !
bUrr
FiRsT
This lineage of dinosaurs, probably had many species with bite forces for their size, as strong as the Tyrannosaurus lineage....
what?
@@alcyon7536 -My comment is pretty easy to understand..
@@edwinreveron870 "probably had many species with bite forces for their size, as strong as the tyrannosaurus lineage"
1. it could've been written better
2. abelisaurids didn't have especially strong bite forces, majungasaurines had wide and deep skulls which helped to grapple with prey, inflicting a lot of blood loss like allosauroids.
3. What do you mean by Tyrannosaurus lineage?
Pantyrannosaurs (proceratosaurids and yutyrannosaurinae) didn't have especially strong bite forces, the same goes for tyrannosauroids.
the only families that had really strong bite forces were the daspletosaurini and tyrannosaurini which both had bite forces way above any abelisaurid
@@alcyon7536 -I mean Tyrannosauridae (or tyrannosaurids) clade and many Abelisauridae skulls indicate that some of them had very strong bite forces, compatible to that to the Tyrannosauridae...
@@edwinreveron870 sorry for the late reply.
No, most Abelisaurid skulls do not indicate a bite force even close to the tyrannosaurinae. (Although albertosaurinae has a close bite force 'range' compared to Abelisaurids, even then Albertosaurines weren't specialized for a strong bite force). Also there would be no need for them to evolve a stronger bite force, most of their prey items were either much larger or much smaller than them.
I feel like the Abelisaurids were the Hyenas of the minder day. Hunting in pack and stealing bodys off of the apex carnivores of there time period. The one exception of course is Carnotaurus.
Yup if I were to compare them to any modern animal hyenas would be my pick the aren't particularly large fast and powerful but they can be very dangerous if they want to they are also normally scavenger's but can kill if needed
To be honest by the late Cretaceous they didn't have a lot of competition from other large theropods in their enviroments with the exitinction of Carcharodontosaurids and very scarce Megaraptoran material (as always).
Except hyenas get their kills stolen much, much more than they steal from predators like lions and leopards. Maybe they were the Creataceous Cheetahs?
@@jihunshin4864 Hyenas are more efficient than people give them credit for, they often overwhelm other predators with sheer numbers. Apex predator Abelisaurids had little competition so they likely lived a different livestyle.
@@jihunshin4864 Cheetas do not steal kill. They're not built for competitive confrontations with large animals.
Snakes with chicken legs. Got it.