Dracorex and Stygimoloch OR Juvenile Pachys (Paleo Myths #2)

Two really cool Hell Creek Pachycephalosaurids have been desrcibed, Stygimoloch and Dracorex. But now these two are entrenched in a debate. Were they valid genera or younger forms of Pachycephalosaurus? #dinosaurs #paleontology
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Sources
2016 Skull Paper: www.tandfonlin...
2009 Summary: The early expression of squamosal horns and parietal ornamentation confirmed by new end-stage juvenile Pachycephalosaurus fossils from the Upper Cretaceous Hell Creek Formation, Montananewsarchive.be...
Horner Presentation: • Jack Horner: Shape-shi...
Prenocephale: thesauropodomo...
Private collection: www.science.or...
Separate Ages: www.ncbi.nlm.n...
Sereno Paper: www.ncbi.nlm.n...
Tiny Skull: eartharchives....
Tiny Skull 2: www.nationalge...

[@redraptorwrites6778]

For the record... A. Reduction in head spikes have also been seen in Triceratops as it aged so that's also within the realm of possibility at least for Marginocephalians. B. I have seen arguments that Sandy and Stygi specimens don't transition well because the have differing dome shapes and spike shapes. Stygi also might be bigger than what should be the older Sandy. Because we lack material from the rest of the head for Stygi, I avoided direct comparisons. C. I'm only using the JWE pictures in my thumbnails because they're easily available pngs. Paleontology is so much more than JP and JW. I'm not an awesomebro who conflates the two.

[@dinofanaticgojifan5760]

I know you love roasting Nanotyrannus, but there are some good arguments. Peter Larson is a big defender of Nanotyrannus. Arm length, placement of the eyes...

[@jeffreygao3956]

What niche would it even have if young Tyrannosaurus took it over?

[@velociraptor4you3291]

You’re not an ‘awesomebro,’ rest assured (😉). One *can* like the “Jurassic” franchise _and_ real-life paleontology and want to learn more about the real-life animals.

[@ginam5497]

@@jeffreygao3956 Idk eating different stuff oh wait tyrannosaur's were generalist

[@oliverqueen474]

There’s also Protoceratops and its frill growing.

[@yissibiiyte]

We used to think that king penguin chicks were a different species to the adults, it's not surprising that we must be making that mistake for plenty of extinct species.

[@thatswhatshesaid2777]

wait seriously?

[@thephilosoraptor8565]

I'm pretty sure that was king penguins, their juveniles are brow and very fluffy, they were called 'woolly penguins' for ages

[@krankarvolund7771]

@@thatswhatshesaid2777 Yeah penguins live in one of the most hostile environments on earth, and they're known for letting their babies alone to go fishing, it's no wonder that the first explorers of the Antarctic saw a group of big penguins, then later a group of small penguins with a total different color and didn't thought they were the same XD

[@yissibiiyte]

@@thephilosoraptor8565 yep, I corrected my comment

[@Aozame]

Male and female eclectus parrots were initially considered seperate species as well, iirc.

[@sonicrose8430]

When I was about 8 or 9 I was a MASSIVE dinosaur nerd and loved researching topics and going down curiosity rabbit holes. I got the opportunity to visit UC Berkeley when they had a special day where they opened up the paleontology area for tours and one tour I was on was being led by Mark Goodwin. At one point towards the end he had the three skulls lined up on a table among other fossils and he just briefly mentioned this theory. At this time I was reading a lot about the theory cause it fascinated my young mind and when everything was over he still had a little bit of time and I actually had the chance to go off to the side and actually go over and chat with Mark about a bunch of the evidence for a bit. Reading or watching something about it was one thing but actually looking at the fossils and other forms of evidence and chatting in person with the paleontologist about it was an amazing experience.

[@4L1-G8R]

You’re so lucky

[@azhdarchidae66]

Even if "Stygimoloch" is a later genus or species, the transitional form from "Dracorex" to Pachycephalosaurus would still look at least similar, right?

[@ZzbulletheadzZ]

You would think so, yes, but without fossil evidence, you can never exactly know for sure

[@jitterbug5630]

Of course Horner was the first one who was interested in juveniles... but besides the point, this is a genuinely intriguing myth, and you did amazing at determining the reasonability of it. I love your content, and I can't wait to see more. Perhaps an episode of paleomyths discussing the invalidity of troodon would be a good idea, I never knew it was a false genus until you mentioned it, but having you take a deeper look would be cool! Keep it up and never stop making videos

[@_rift_4317]

I know they aren't docs, but I think it'd be cool if you judged the accuracy of dinos in games like The Isle, Path of Titans or Beasts of Bemuda

[@nerdsamericashorts4887]

YES

[@SaurusMaximus]

Young Pachycephalosaurus:"No dad, this isn't just a phase this is really me."

[@Anthony-co4wz]

I can't wait to see that Nanotyrannus myth video. If it was different genus or a juvenile T.rex.

[@mhdfrb9971]

Some says it's a juvenile Daspletosaurus

[@seanmckelvey6618]

@@mhdfrb9971 How? it comes from the same time as Tyrannosaurus, we have no Daspletosaurus fossils from that time, it had presumably been extinct for a few million years at least by that point.

[@tylerfish2701]

@@seanmckelvey6618 Well, you got me. By all accounts, it doesn't make sense.

[@mitchellskene8176]

While Jane is clearly a juvenile T Rex, given the type specimen skull had a different brain structure to adult Rexes, it's likely the Skull is not from a juvenile T Rex. The dino doc Dino Death Match proves it.

[@curious5887]

Hi, finally, a topic about Dracorex and Stygimoloch is or not a Juvenile Pachys, because i can’t find much info about them

[@curious5887]

First like

[@jamessparkman6604]

@@curious5887 I think the idea that dracorex and stygymolich or just juvenile pachycephalosaurus, is a big fat lie

[@papasmoke2982]

Baker: “the true answer to the nano and pachy debate, it came to me in a dream!” What a Chad

[@matyaskassay4346]

Another interesting thing about Pachy that not many people seem to know is that it was most likely an omnivore which also included meat in it's diet.

[@Carnidoom]

in the game path of titans they made it omnivopre too

[@jeffreygao3956]

But only things like small mammals or reptiles; Pachycephalosaurs aren't macropredators capable of slaying giant herbivores like Edmontosaurus. Perhaps a racoon comparison works?

[@matyaskassay4346]

@@jeffreygao3956 uhh yeah, obviously I didn't mean it like that. There's a lot between being a herbivore and hunting a 6 ton Edmontosaurus, lol.

[@professormultipurpose5244]

So you’re telling me those Pachycephalosaurs in The Land Before Time trying to eat one of the kids actually ISN’T inaccurate? …this changes everything

[@theloafs2622]

Many herbivores weren't completely plant eaters as horses, cows, and other "herbivores" ate meat and same thing with carnivores so I think that pachy liked meat but it's diet was more plants as they were more common than small dinosaurs

[@SaurianStudios1207]

I really like this new series that attempts to either confirm or debunk myths about paleontology and prehistory that harm the general public’s view.

[@LoudmouthReviews]

Wonder why Pachy didn’t appear in Prehistoric Planet since it fit the time period

[@oliverqueen474]

I know! Pachys need more love.

[@mhdfrb9971]

Also lack of Crocodylomorph make me disappointed a bit

[@CaptainKotetsu]

I don’t care if Horner might be right about this one thing(huge maybe). The Triceratops/Torosaurus nonsense still annoys me to this day.

[@thatswhatshesaid2777]

Fun fact: "Dracorex" was actually given it's name by a contest!

[@LotBFOC2]

I have ideas for next episodes from Paleo-Facts series: 3. Scipinoyx is adult Compsognathid or juvenille dinosaur? 4. Dakotaraptor is chimera? 5. Andrewsarchus was BIGGEST carnivore mammal? 6. Megarachne - from largest spider ever to sea scorpion. 7. How big was T.rex? 8. Paraceratherium - no biggest land mammal? 9. Feathers were created in Triassic? 10. How really sounded dinosaurs? 11. Shonisaurus larger than Blue Whale?

[@Raventhe3rd]

i would like to see the dakotaraptor one its been really bugging my mind

[@jeffreygao3956]

Step down Andrewsarchus! Big yes. Greatest there is? No way! It's BEARS that're the largest land mammals.

[@markcobuzzi826]

Another question I sometimes ponder is whether sexual dimorphism could factor in too.

[@redraptorwrites6778]

It definitely could play a role!

[@joshuaW5621]

This is one of those topics that confuses the hell out of me, much like if the Hook Island monster was an actual animal.

[@BigBossMan538]

I want to know why would Dracorex and Stygimoloch have spikes? Were they just harmless features or did they serve a purpose in life?

[@peeperleviathan4970]

can you do whether torosaurus is a juvenile triceratops

[@redraptorwrites6778]

It will for sure come someday 👍 Though the myth is that Toro is a fully grown Triceratops

[@jeffreygao3956]

I personally doubt this. There’re actual young Torosaurus.

[@rafexrafexowski4754]

Another interesting idea that was recently proposed is that many compsognathids are very young megalosaurids, carcharodontosaurids or other non-coelurosaur theropods due to the VERY scarce fossils of carcharadontosaurid juveniles being extremely similar to comsognathids. What do you guys think?

[@ivanrichardson1362]

Sounds pretty interesting

[@matyaskassay4346]

Yeah, Compsognathidae has always been a poorly defined family, so it might be poliphyletic... the more well-known members however, such as Compsognathus or Sinosauropteryx are definitely their own things.

[@rafexrafexowski4754]

@@matyaskassay4346 Yes, claims for the entire family to consist of junior synonyms have been proposed but they are considered very unlikely. Still, many species are now being reclassified as non-coelurosaur theropod juveniles.

[@dudotolivier6363]

@@matyaskassay4346 The Compies and the Little Panda-like colored Sinosauropteryx are well studied and we known that they are their own valid animal (and that they were adult too) because we have several very good materials from them. But for the others, it's true that their lacks. This theory was put with the Scipionyx (very famous for his holotype bady italian specimen that ate a fish during his two-three days of life) when this latter was discovered to be a Carcharodontosaurs. And an man (don't remember his name sorry), maybe the same who made this reveal, come and said that al the compsognathid were young Carcharodontosaurs too. But in the same time, this iea is very controversial, at the same level than the theroy of the three T-rex species that came more recently last year. And the guy itself is know to be discutable like Horner is. So.... For me, every others genus of the family that came from the same or neighbours regions anf ages of the Compsognathus can be see as true members, because in Europe in Jurassic was mostly just a sea with numerous small islands throughtout, so with little to have Carcharodontosaurs. Also, at the moment that Compsognathus still valid how we know he is, the family Compsognathidae still valid too, it's just that the others will maybe go into others faillies or create new ones following the cases in the future.

[@LeoTheYuty]

Loving this series so far. Also, the description is talking about the giganotosaurus from last episode, should change that.

[@ozthecapybara9182]

Can't believe that JACK HORNER Is in Puss in Boots 2🤣🤣

[@oliverqueen474]

It’s the nursery rhyme character, but yeah. 😂

[@seanmckelvey6618]

I think this is a pretty plausible hypothesis. We know that reduction is cranial ornamentation is something that apparently happens in the marginocephalia group based on things like Triceratops. I think we really need more fossils of each genus to really get a proper picture of what is happening here, which is a pain because Pachycephalosaur remains are stupidly uncommon.

[@blondbraid7986]

I guess it's not just the Pachchephalosaurs butting heads over this question.

[@GoGojiraGo]

Great video, and a debate that won't be solved(?) until we get more specimens of all three animals. If it comes to it, I will miss Dracorex and Stygimolich, but they'll always be around in my heart.

[@NitroIndigo]

Millions of years from now, future palaeontologists might think that different breeds of dog are different species.

[@NitroIndigo]

@Master Baiter I can't tell if you're agreeing or disagreeing with me.

[@joshuastrittmatter4188]

Imagine if there’s a complete skeleton of Carcharodontosaurus-and it’s the largest land carnivore that ever lived-but we can’t see it because it’s in a private fossil collection.

[@jeffreygao3956]

Because who would want to keep it in a private collection rather than become rich and famous by revealing it to the world?

[@chaosthebaryonyx6344]

I remember being so mad when I was young when I first heard that my then beloved stygimoloch is most likely not a valid genus.

[@StegiaAirsoft]

I love Your videos lol, You got me into dinosaurus again, thank You for Your great content!

[@kuitaranheatmorus9932]

The second episode of this series,was pretty cool But yes a definitely a interesting one, also hope you have a great day

[@SaurianStudios1207]

I recently watched a video that explains and debunks the idea of 3 separate species of Pachycephalosaurus from this video: kzbin.info/www/bejne/faG7npileL-Ab5o they did a great job of condensing all the info. A shame since I really liked the names “Dracorex” and “Stygimoloch” but they are not valid genus, but I do find the growth stage far more interesting than just having it be three separate species.

[@claudiamarino8317]

I think only dracorex isn't valid

[@darknessdescending6695]

@@claudiamarino8317 Stygimoloch is still most likely a juvenile Pachycephalosaueus. It being found later in time just proves that Pachycephalosaurus lived for a longer time than expected, not that Stygimoloch is its own genus.

[@pedronycum6765]

I think that t rex's or tyrannasoroids in general ate the bones and all of smaller herbivors,thus making it harder to identify any smaller herbivors or younger animals

[@pedronycum6765]

Or any large carnivore that can swallow a body whole or any giant herbivores stomping them

[@dinojoegold7534]

the bald one that looks like friar tuck

[@sauraplay2095]

I am interested what they can find out in the future. Great video btw!👍

[@mitchellskene8176]

The ultimate dino myth is the existence, or lack thereof, of Brontosaurus.

[@darthdistix1895]

Actually form what I know the genus was resurrected with the power of friendship soo yee it exists

[@mitchellskene8176]

@@darthdistix1895 Some paleontologists disagree, which is why my comment was worded the way it was.

[@darthdistix1895]

@@mitchellskene8176 ooooh so brontosaurus got the thanos snap TWICE

[@mitchellskene8176]

@@darthdistix1895 Not so sure you can call it a double snap. It's more like some people don't view the resurrection as legitimate.

[@jeffreygao3956]

Even if Brontosaurus is a junior synonym of Apatosaurus, it would still be a different species and as such, distinct as lions and tigers.

[@tyrannotherium7873]

Please do a rant on the stupid idea of ceratopsian horns being fragile and stuff because that’s a jack Horner Myth

[@Lycan3303]

memba when people thought Parasaurolophus could breath fire ?.... i Memba ;(

[@cactusgamingyt9960]

Are you a hundred years old?

[@Lycan3303]

@@cactusgamingyt9960 maybe

[@johnheed8933]

What estimated time can we expect the Prehistoric Planet accuracy review? I am so looking forward to it.

[@neur01]

digging this format

[@estheriel_1423]

Something i am trying to find out about the pachycephalosauria, skulls. A theory I have is, if eyes don't grow or change with ageing, then pachycephalosaurus, stygymoloch and dracorex were the same species, then they would have the same size of eye socket

[@Mr.M3447]

April Fools should be was T-Rex a scavenger, but in all honesty, what about did Smilodon and other saber toothed animals have lip coverings

[@kennethtraver7628]

I don't normally make suggestions since I don't know how often content creators are given them and are potentially harassed with them, but I'd like to throw this suggestion out there: what about dinosaur intelligence? Often Troodonts are said to be the smartest dinosaurs, but studies have shown other dinosaurs like Tyrannosaurids being smarter. I watches a video not long ago that even said T. rex was potentially smarter than some corvid birds (ravens, crows, and magpies) and even baboons. I feel it's a subject that'll be great for discussion.

[@voodooonevipersonstation663]

On thing I asked myself is “why the reduction of head spikes” and I realized that if one of them were to break during combat it’s not like an antler where it will regrow, it’s living tissue meaning it would probably hurt the pachy. So one question remains; why even grow the spikes in the first place if they are just gonna reduce later on? One idea I have is maybe it was some sort of protection, like armouring up the juveniles so they can stand a chance to adulthood, maybe make some large therapods reconsider them as prey as they’d be uncomfertable to eat? The other theory is it’s some residual trait of evolution.

[@trexgamer2367]

Hey I have been watching your videos for quite a while now and I think I would be interesting if you did a paleomyth video on “troodon”.

[@redraptorwrites6778]

Thank you! And that's a great idea!

[@Geniusprimate]

This is a terrible idea

[@Skorpionzilla]

Primeval had weirdest but coolest dracorex design

[@Bagelgeuse]

Eh, it's alright. A bit too dragon-like in my opinion, but as a sci-fi monster design, it's alright.

[@wetburntbagel]

Sad to see how one of if not my favorite dinosaurs in the Jurassic world movies might not be accurate but this is science after all

[@PoochieWooch]

The next Paleo myths is the many functions that Stegosaurus has with its plates, one idea is from Robert Bakker that a Stego can move its plates like a porcupine the most famous depiction of this idea that I recall is from PBS the Dinosaurs. And the debate that Sabertooth Cats have exposed Canines or Not.

[@mhdfrb9971]

Also weather T-rex are direct descendants of Daspletosaurus and if Ornithischians are actually a derived Silesaurid

[@PoochieWooch]

Well that too any others ?

[@danktorvosaurus]

Question: Where did this footage come from? 2:17 Some Documentaries you left out: Flying Monsters with David Attenborough(2011) Prehistoric Predators(2007) Prehistoric(2009) Dinosaur 13(2014)

[@raptorblack2269]

It's from Jack Horner's documentary "Dinosaurs decoded" where he explains how different juveniles trikes,pachy and rexes were different from adults by saying that dracorex, stygimoloch and nanotyrannus were not different species. But it also says some jack's bullshit like "the head is the worst place for a defense attribute" "pachy would kill each other while head ramming" and of course "T-rEx WaS a ScAvEnGeR"

[@ToaArcan]

Imagine being a normal guy and living your life, and you die alongside your kids, and then millions of years later some weird monkey calls you thick-headed, your older kid a demon, and your younger kid after some YA book.

[@pubertdefrog]

I’m kind of curious to see what the verdict on saurophaganax being a different species or just a big allosaurus

[@nerdsamericashorts4887]

Everyone agrees it was its own species. It’s just a debate on if it was it’s own genus (saurophaganax) or another species of allosaurus (A. Maximus)

[@pubertdefrog]

@@nerdsamericashorts4887 yeah my bad I meant genus

[@Thatguy-sm8cw]

The memes were strong with this one. Well done

[@danielmalinen6337]

At least Wikipedia took down the Stygimoloch and Dracorex articles some years ago and removed the mentions of them because the species were no longer valid and were merged into Pachycephalosaurus. Besides, I have also understood that paleontology, academic and the research field don't like it if the juvenile Pachycephalosaurus is referred to by its old names and the use of the names Stygimoloch and Dracorex should be avoided in eny circumstances. However, I still have a hard time understanding why not all Pachycephalosaurus juveniles had horns and how Pachycephalosaurus dropped or melted its neck horns when it grew bigger, when juvenile's horns seem to be part of its skull bone.

[@ravenouself4181]

The Stix wasn't a horror, for the record. It was just the border between "Limbo" and the "Afterlife". If You had the tribute to pass - You would. If You didn't.. well... Voldemort would have a new roomate.

[@svenkrisenberg6684]

leave it to a guy named jack horner to be the one to try and slander dinosaurs

[@TheChristopherRomano337]

Can you do Torosaurus next?!

[@joshuavis2736]

I was about to say what’s next some ceratopsians are actually the same species? Only to remember the whole triceratops torosaurus claim

[@matador_iv]

Are Scipionyx and Compsognathus juvenile carcharodontosaur?

[@Abominatrix650]

Aww no Primeval clips of Dracorex? That was such a cool episode!

[@IndominusRex-wc1ey]

Goofy ahh Dracorex design tbf

[@matyaskassay4346]

I guess it makes sense... if the head dome was used for intraspecific combat, juveniles really had no reason to spend so much resources in growing that massive bone structure. I wonder tho, if it was used mainly by males to compete for females, did the females have a less developed head structure? If this was the case it would be easy to distinguish sexes if we find more Pachy fossils.

[@jeffreygao3956]

So, why are there so few Pachycephalosaurus fossils? They aren’t mountain goats!

[@dabird8304]

1:27 I was really hoping there would be Archeroraptor or Pectinodon but unfortunately, no

[@terrorbird3080]

Is raptor pack hunting next?

[@raptormage2209]

If more pachycephalosyds get discovered they should be named something like Acheroseth and Coccytyphon so we can have the other 2 underworld rivers and some other monsters/ Gods

[@Nihilusfell]

Can you discuss the species Troodon or the renaming of Kronosaurus 👍

[@hamishseymour1108]

Whether or not I think that Pachycephalosaurus Spinifer is a second genus to the original, it's quite possible and sensible to draw and/or come up with the second genus, just in case something new shows up about Pachycephalosaurus.

[@dagoodboy6424]

I saw a few old documentarys on yt of mezioc new zeland u should review.

[@xy3474]

I hope next one is about pack hunting or spino

[@Ermington321]

Idk I mean present day young animals don’t look this drastically different from there adult forms unless we’re talking about insects.

[@AghiTron]

Stygimoloch and Dracorex are such metal names and they used them on pachycephalosaurids. No disrespect to them, but the names could have been used so much better.

[@bestuan]

Factor trace made a good video on this too

[@tyrannotherium7873]

Yes despite that I may not like Jack Horner he is right about the growth stages of nannotyrannus being a juvenile tyrannosaurus and Draco Rex and stegy Being juvenile versions of pachycephalosaurus before that time back then I disagreed with him a lot

[@Potatoshaneko]

The pachy could just be like a Bull or Alpha of the herd and the rest look like Stygimoloch.

[@liopleurodonthedinoman3637]

Hey red a dinosaur book I have states the Homalocephale can give live birth, is this fact still considered valid or invalid, so can you make a video to explain to?

[@redraptorwrites6778]

They have a relatively wider pelvis but it sounds like a big stretch.

[@gemstonegojira24]

Do the Nanotyrannus controversy next!!!

[@kevinquinonez838]

If this is true will we just call a baby Pachycephalosaurus dracorex like how we call baby cats kittens

[@petroshalkos3453]

I had an arguement with a guy about this in the comments of a video where pachy and stigy where portrated as the same spicies.Ofcourse this was wrong cause the video was deticated to the jurassic universe where they are clearly 2 diffrent dinos but a stan of the youtuber came up and told me to do research before commenting cause im dum.I searched it up and he just typed in google and pressed a random button, I just pressed an other random button and it said that they ARE the same spicies so im really curious cause to be honset google isnt really reliable.

[@dudotolivier6363]

It's very strange that the fossils record of Pachycephalosaurus, Dracorex and Stigymoloch are very fragmentary and rare. They all come from the exact same formations than T-rex, Triceratops, Ankylosaurus and Edmontosaurus, and all these have a fucking numerous amount number of good and well preserved fossils materials for each. These formations were really good areas that have preserved well during millions years ago their fossils, which is also a rare fact to point out (the others being mainly Asian formations). So, really, that make any sens at all taking that into account... Because technically, we should have as numerous fossils of these animals as all the others. It's possible that Pachycephalosaurid and this species weren't as present than the others kind of dinosaurs, who them, were extremely present in these areas. Which will explain why there a few fossils of Pachycephalosaurus and co, because there was at the base not a good and big population at the time. Because formations are dated for a precise point in the time, and not dated as a period from one point to another one. We do now which age they are, but we do not how long these formation det old and when they disappeared. Also, as far I know, outside Pachycephalosaurus itself, we don't know many others Pachycephalosaurid in North America. This family was mainly a Asian one that migrate to North America in one point (like the Therizinosaurs, Oviraptorian, Ceratopsian and Tyrannosaurs for example). But it's just a theory of mine.

[@calessel3139]

On a related subject. What's the current status of Horner's claim that Triceratops is actually just a sub-adult of Torosaurus?

[@calessel3139]

@Master Baiter OK, thanks.

[@The_PokeSaurus]

7:27 Animals don't do that, they can't reabsorb bone like that. No modern-day animal does it. It makes no sense for an animal to grow huge horns just to "reabsorb" them right before becoming an adult. And you can't use Triceratops to say otherwise because the head spikes aren't really lost or absorbed on Triceratops, the frill just keeps growing around the spikes, you can't say that with Dracorex or Stygimolock, the horns are too long. Also, even ignoring that there is the Dracorex specimen MPM 8111.

[@benlaws561]

Even if the two are just pachys, The names could still be used as names for the animal as it grew up.

[@Jinx-z2g]

IF there would be three separate species of pachycephalosauroids in one formation/ecosystem.. wouldnt there be some sort of competition between the 3 species? If so, is there some proof for that? If not, then these two indeed were juvies and adols. Ez.

[@Kakaragi]

Might you cover whether Spino can swim or not?

[@ivangreat4885]

It's interesting you say pachys head butting each other could be a myth imo it just make sense male animals will hurt and injure them selfs for territory and female. I mean big horn sheep have skulls that can resist trauma but no amount of resistance will help if they keep bashing their heads against each other so even tho it hurts them that just what animals do for that stuff. Passing your genes is more important the injures

[@TheFoshaMan]

I think Stygi is another genus/species, but Draco its a Juvenile ;-;

[@SMeekerorum]

stygimoloch is a genus, for example: tyrannosaurus - genus rex - species or allosaurus - genus fragilis - species

[@TheFoshaMan]

@@SMeekerorum I know, I think you misunderstood my comment

[@SMeekerorum]

@@TheFoshaMan i get it now

[@liopleurodonthedinoman3637]

I like to think of these three Pachycephalosaurids as there own separate species, don’t begin to criticize my opinion Red because I’d like you to appreciate my opinion

[@Dracovenatrix]

First and good myth to choose

[@joshuareinhardgunawan3860]

ulti but is young vesions from one piece anime

[@tyrannozilla1]

next be Troodon and Nanotyrannus also Torosaurus

[@jurgen1395]

What is your thoughts on ice age giants the one with 3 episodes

[@NeighborNick.]

I’m so sorry the jack Horner marriage debacle is just... 🤮 I respect this channel so I’ll avoid foul language, but what the heck is wrong with some people?

[@jesusmejia79]

while I starting to see why jack Horner said all 3 are 1 animal stygimoloch most Definity is its own species not a young pachy or an old dacorex so instead of that jack Horner and those who believe that should look more on pachys and dracorex on whether Draco is its different animal or a young pachy I also seen darocrex as its own species

[@haumea2097]

Maybe the reason Stigymoloch skulls were found from later periods than Pachycephalosaurus, is that Pachycephalosaurus may have went trough Neoteny like Axolotl and reaching sexual maturity while it's phisical form is not fully mature yet.

[@jonathanbischoff2755]

I have one: can dinosaurs exhale out off ther mouth?

[@vitsvoboda2803]

Did dakotaraptor exist, or its only a turtle?

[@t-rexstudioproductions781]

There are 3 different species Dracorex Hogwartsia, Stygimoloch Spinifer & Pachycephalosaurus Wyomingensis Jack horner theory debunked

[@IndominusRex-wc1ey]

Genus not species

[@29evergernes35]

Next do spino

[@drippyred1603]

Day 2 of asking to review worlds biggest beast

[@Fernsarenice]

can we have an episode of this where you talk about if the JP3 spino was accurate and just go off in a rant about it, people think they know so much about my relatives when really they don't know jackshit and are brainwashed by this trainwreck

[@frosttheicefloeturtle8143]

13:12 LMAO