Do We FINALLY Have a New Tyrannosaurus Species?!

[@endymallorn]

Calling the common name now: T. Mac.

[@krankarvolund7771]

T. mac, a species name never gets a caps ;)

[@patreekotime4578]

T. macra!

[@-c.c.frear-]

I've read a comment on a different video calling it Mc T which I love

[@juanyusee8197]

T. Maclunky!

[@GalvyTheTom]

T. mex

[@jurassicswine]

At first I was extremely skeptical of this idea, but reading through the paper, and just thinking about it more: I’m starting to believe that it’s likely a new species of Tyrannosaurus. I still think it’s possible that this could just be another T. rex, but the idea of a new species seems more and more likely to me.

[@lordcooler8160]

I on the other hand developed skepticism after reading it in that it’s a Tyrannosaurus. In the paper they mention several times that it’s both very similar to Tyrannosaurus rex and Tarbosaurus, and in many instances more similar to Tarbo. So I think it would actually make more sense to consider this a completely new genus (but within the same tribe as T.rex) or to include Tarbosaurus in the Tyrannosaurus genus as originally envisioned back in 1955.

[@mhdfrb9971]

​@@lordcooler8160some says the species is parallel evolution to Tarbo more adapted to hunting sauropod

[@seanmckelvey6618]

@@lordcooler8160 Imagine if this ended up being an American species of Tarbosaurus rather than Tyrannosaurus. Would certainly help explain the evolution of Tyrannosaurus itself.

[@lordcooler8160]

That's also a possibility, after all there was both an Asian and North American Sauralophus species, so there can also be a North American Tarbosaurus.@@seanmckelvey6618

[@tylerknowsanimals]

Fascinating research! It'll surely be interesting to see how more scientists respond to these findings, as well as what further research will be conducted. Thank you for reporting on this.

[@RaptorChatter]

I'm sure some of the people who are likely responding to the Nanotyrannus paper are also going to respond to this

[@Geniusprimate]

What does tyrannosaurus mcraensis mean???​@@RaptorChatter

[@ar5611]

Ah yes the second “radical” tyrannosaurus paper of the year

[@seanmckelvey6618]

Obviously further research needs to be done, but if the information in this paper is accurate it does raise some interesting questions. I'm certainly more intrigued by this one than then Nanotyrannus paper.

[@lordcooler8160]

If this new Tyrannosaurus is in fact 72-71 million years old then it disproves the belief that Albertosaurus died out because Tyrannosaurus ventured into its territory and killed it. This is because this would mean that Albertosaurus and T. mcraeensis coexisted in Laramidia (though in different parts) for 3 million years, T. Mcraeensis was roughly the same size as T.Rex yet it didn’t just venture up north and bully Albertosaurus to extinction. So the extinction of Albertosaurus roughly 68 mya was not due to Tyrannosaurus. One hypothesis that I have is that northern Laramidia in the late Campanian and early Maastrichtian favored predators that were more built for speed rather than brute power, meaning Albertosaurus (being a faster animal then Tyrannosaurus) was able to dominate. But then in the late Maastrichtian Triceratops (a giant bulky tank) became the dominant herbivore, and this favored predators that were more built for power such as Tyrannosaurus.

[@RaptorChatter]

That would also make sense with a separate guild of southern tyrannosaurs, like the teratophonines in the south of Laramidia, and then taking over the rest of it later.

[@soybasedjeremy3653]

​@@RaptorChatterWhat if this is the invasive species that crossed from Asia to North America, that T.rex evolved from?

[@AmericanAdvancement]

⁠@@soybasedjeremy3653If T. mcraeensis’ dating holds up then it blows the Asian tyrannosaurus theory out of the water since zhuchengtyrannus would have been its contemporary from Asia. My hypothesis is that T. mcraeensis evolved from the southern laramidian tyrannosaur lineage that includes lythronax and migrated across Beringia just after daspletosaurus went extinct. This would mean that the Tyrannosaurini branch had two parallel lineages that lived around the same time as each other, one from Asia in the forms of zhuchengtyrannus and tarbosaurus and the other from Laramidia in the forms of T. mcraeensis and T. rex.

[@seanmckelvey6618]

@@soybasedjeremy3653 That's very possible as well. It doesn't rule out that Tyrannosaurus evolved from an invader from Asia, but it might force us to rethink the timeline of how that played out.

[@soybasedjeremy3653]

@@seanmckelvey6618 Thanks brother. Edit: It has features of Asian Tyrannosaurids. I have and several others have pointed this out, that's why I think this is the invasive species that later evolved into T.rex.

[@TheFandomExpert]

Curious and curiouser! Very interested in what the larger scientific community has to say about both this and the nanotyrannus paper. I'd particularly love to hear what the discussion is around the phylogeny, since, as you said, it appears the data set is odd or incomplete in some way that is (presumably) not addressed properly by the paper itself.

[@RaptorChatter]

My thoughts are also on another comment I saw which I didn't mention, but most other tyrannosaurs have been found over pretty broad time frames, especially with Daspletosaurus, and Albertosaurus. So an early Tyrannosaurus doesn't seem too strange. That said Albertosaurus is still one species, so I think it's more about defining a single species evolutionary trend, and what defines a species, which is always a hard question

[@seanmckelvey6618]

@@RaptorChatter Personally I find Albertosaurus being a single species that existed over such a wide time and geographical range kind of odd, I have to wonder if we're just unware that we're looking at multiple species there as well. Alternatively, that could be totally off base and maybe Albertosaurus was just especially successful & long lasting. So many questions.

[@KadenSlinker]

@@seanmckelvey6618There is still the yet to be identified Wapiti Albertosaurine which may or may not represent Albertosaurus.

[@KadenSlinker]

@@RaptorChatterI am also curious on whether or not there will be a new paper refuting the recent Nanotyrannus paper coming out later this year?

[@sskuk1095]

Hey, I just want to thank you for putting the source directly into the video description.

[@jthomas8263]

Callaghan, T-Mcraeensis is actually a T-Rex's Big Sibling.

[@colekesten9596]

If this is true then the US will be in the same boat as South America with two Apex carnivores of similar sizes existing within a few million years of each other (Giga - mapusaurus , Rex - new tyrannosaurus)

[@thomasvanhiel6105]

Morocco has spinosaurus and biggest crocodile ever

[@colekesten9596]

@@thomasvanhiel6105 sarco isn't the biggest ever but ye Africa too kinda, I meant same family tree

[@KadenSlinker-cw6cl]

I agree more with paper than on the Nanotyrannus paper.

[@artificercreator]

That is interesting! Thanks for the news!

[@patrick_j_lee]

If Thanatotheristes is grouping between Daspletosaurus species, wouldn't that mean that it's possible that Thanatotheristes could also be a species of Daspletosaurus, rather than their data set being faulty?

[@RaptorChatter]

I would not be shocked if someone proposed that in the future. I remember some people discussing that could be the case when it first was described

[@krankarvolund7771]

6:10 I am no specialist, but from what I understand of phylogeny, if you have a creature with a different genus that is more closely related to some species of your genus than the others, that's a problem. Here, Thanatotheristes degrootorum is more closely related to Daspletosaurus horneri than D horneri is to D torosus or D wilsoni. So that means either they think that D horneri should be Thanatotheristes horner, or Thanatotheristes degrootorum should be Daspletosaurus degrootorum.... Either way, in the way they present it, their phylogeny have a paraphyletic group which is not good ^^'

[@Neonblue84]

very interessting, T. rex becomes a brother/sister T. mcraeensis

[@AndreTheMann]

New Tyrannosaur before gta 6

[@Gorgonopsidcommenter]

Man, the beginning of this year has been big for T. Rex!

[@peterolbrisch8970]

Now I cant get the image of a trex doing the macarena out of my head.

[@AcroLearn]

We (probably) got a new Tyrannosaurid before GTA VI 😭

[@patreekotime4578]

The idea that we may have two new Tyrunny's before January is even over is awesome!

[@krankarvolund7771]

They could have chosen a better name though. Maybe the other paper was bullshit, but at least, its species names was as awesome as Tyranosaurus rex XD

[@patrick_j_lee]

Agreed. I loved the Tyrannosaurus "royal family" Paul created.

[@Lycan3303]

Long live the King 👑

[@HidalinaB]

Hello, Your thought on the chickensarous? Also, would it be possible for a triceratops be a T-Rex killer?

[@Fede_99]

Finally!!! Adult Nanotyrannus!

[@seanmckelvey6618]

Sorry what? where did you get that from in this paper? It's older than Nanotyrannus would be if it was real anyway, as it Nanotyrannus coexisted with T.rex, allegedly anyway.

[@Fede_99]

@@seanmckelvey6618 it was meant to be a joke

[@alsdrumhang]

I'm down for a new species, just let down on the specific name which feels a little boring. But I'll take it!

[@kuitaranheatmorus9932]

Amazing video

[@sampagano205]

2:21 33 meters of rock sounds like it'd actually be many tonnes.

[@RaptorChatter]

Lol it would be. I suppose I could have been more clear that doesn't mean the passage of a ton of time, maybe still a few millions of years, but not enough to make it be around at the same time as most Tyrannosaurus rex specimens.

[@soybasedjeremy3653]

Is it possible that T.rex evolved from an invasive species of Tyrannosaur?

[@krankarvolund7771]

That's pretty much what "migrated from Asia" means XD

[@soybasedjeremy3653]

@@krankarvolund7771 Yes, but I'm saying is this the species that T.rex evolved from, a direct ancestor. Plus he said that Tyrannosaurids migrated from Asia to North America, then showed signs of going back to Asia. Instead of going back to Asia, I think Tyrannosaurids migrated Northward.

[@AmericanAdvancement]

⁠​⁠​⁠​⁠@@soybasedjeremy3653If you mean by more primitive tyrannosaurs, then they do have an Asian origin in the forms of guanlong, yutyrannus, etc. If you mean tyrannosauridae, then yes they have a North American origin starting with lythronax and then eventually radiating north and across Beringia to Asia.

[@soybasedjeremy3653]

@@AmericanAdvancement I mean anything closely related to Tyrannosaurus rex, Tarbosaurus, and the other mentioned Tyrannosaur. Albertosaurus and Gorgosaurus are distantly related, I'm guessing that if this Tyrannosaur is a new species, this is the species that caused Albertosaurus to go extinct and other Tyrannosaurids to go extinct in North America.

[@AmericanAdvancement]

@@soybasedjeremy3653 I’d counter with the fact that the area around what would be known as the hell creek formation was undergoing large ecological changes as it transitioned from the judithian to the lancing faunal stages. During the transition the non tyrannosaurini tyrannosaurs, lambeosaurines, and centrosaurines went extinct and were replaced by edmontosaurine hadrosaurs, tyrannosaurini tyrannosaurs, and chasmosaurs. My bet would be that the rapid retreat of the western interior seaway was the cause of this faunal turnover rather than competition and the survivors from southern Laramidia filled in the empty niches.

[@Deadpool3E]

I think later in the video, you referred to some undescribed material as "Alamosaurus". I'm thinking you actually meant "Alamotyrannus".

[@RaptorChatter]

Yep, my mistake on that bit. Probably misspoke because Alamosaurus has been described and there's only rumors of Alamotyrannus

[@joshuaball5916]

I hope T. imperator & T. regina are next.

[@Latenivenatrix_Mcmasterae]

It’s about time

[@apnosaurus]

they didn't add Nano because it was not a thing

[@vahidhosoda6614]

Leviathan of the Cretaceous!!!!!

[@RiddleBoxBree]

im curious how many people get butthurt about there being a new tyrannosaurus.....

[@canis2020]

I'm just generally butthurt so I just need a slightly inconvenient target. It's because my ego is fragile and my personality is "guns".

[@Pikascout]

Im only butthurt on the fact that the species name is not as badass as its cousin's I feel Tyrannosauruses deserve it

[@krankarvolund7771]

The only thing that get me butthurt a little is that it's another species that gets described on not a lot and could be abandonned in a few years or months, just like last year. It's more solid than last year, but it's still not a lot ^^'

[@amn2760]

​@@PikascoutWhy not Tyrannosaurus supremos (“supreme” in Spanish)

[@patreekotime4578]

​@@krankarvolund7771 They are not huge specimens, but the comparison photos make a pretty good case for it being a different species. That dentary is wildly different.

[@abdulazizrex]

This tyrannosaur might share the same fate as nanotyrannus!

[@mitchellskene8176]

Only if it's dated wrong. At 72-71 million years old, ain't no way that's a Rex.

[@thomasvanhiel6105]

They say this species is bigger then t.rex

[@WHACK_space_rock]

I read the paper, and I think these guys are reaching a bit. We'll need more remains and papers from others before I accept a new species. Having a new species I have no problem with, but it's gonna take more than this...

[@fabricreative1930]

Is Alamotyrannus the same as T. mcraeensis or is it different?

[@isaacslein6432]

It is a different specimen. "Alamotyrannus" is from Ojo Alamo Late Maastrichtian, hence the informal name

[@RaptorChatter]

We don't know yet, nothing super concrete has been published about Alamotyrannus yet, and these could be the same species. The people working on the fossils really need to talk to each other to parse through their data and find out what's going on there.

[@isaacslein6432]

@@RaptorChatter I interpreted the comment from the perspective that it is not the same fossil because they were found in different formations and probably times. However; it might be the same, as you said, since the exact date of T. macraeensis is not known

[@jthomas8263]

Only T Rex is Valid.

[@sr_1027]

guyyssss plz i am 12 i want to find a new species but finnaly NOW I CAN I AM GOING TO NAME IT MAGNUS REX magnus dreived from latin "magnus pes" means big claw if you are a paleotologist plzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz name it magnus rex plzz

[@dennismason3740]

"...there's a few species..." translates as "there is a few species...", which is grammatically incorrect. Yes, grammar is an art and a science and it has some wacky rules. "Are" refers to plural, or multiples. "Is" refers to singular, or one. "There're a few species" or "there are a few species". As a scientist, you know what I'm saying. Schools stopped teaching grammar. so I've been told. There are exactly 17 people on Earth who know English Grammar in it's essence. I am one of them, no awards, please...

[@RowanRabbey]

*its

[@Glunked]

Whaa whaa

[@psss1282]

Weird flex but ok

[@EvilTwinRC51]

@@RowanRabbeythat’s classic!

[@cyrus8886]

🤓👆