May 2022- Paleontology in Review

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00:00 Join our patreon www.patreon.com/raptorchatter and our discord / discord
00:21 Miocene crocodylians- Piscogavialis and Sacacosuchus
www.researchgate.net/publicat...
01:57 Skin patterning and stomach of Eocene moonfish
onlinelibrary.wiley.com/doi/f...
03:26 Skull size in archosauromorphs
onlinelibrary.wiley.com/doi/f...
04:42 Were dinosaurs warm or cold blooded?
www.nature.com/articles/s4158...
06:45 Microbiomes in Late Pleistocene megaherbivores
www.biorxiv.org/content/10.11...
08:18 Reassessment of Faxinalipterus minimus
peerj.com/articles/13276/
10:06 How to verify fossil tracks: the first record of dinosaurs from Palestine
www.tandfonline.com/doi/full/...
13:18 Increase in ecological specialisation throughout the Ediacaran period
journals.plos.org/plosbiology...
14:14 Ediacaran had a lot of trace fossils
www.cambridge.org/core/journa...
14:49 Trilobites had claspers like horseshoe crabs
pubs.geoscienceworld.org/gsa/...
16:12 The first crabronid wasps from the Crato Formation
www.sciencedirect.com/science...
17:56 Spinosaurus pre-print drama
Preprint 1- www.biorxiv.org/content/10.11...
Preprint 2- www.biorxiv.org/content/10.11...
Preprint 3- www.biorxiv.org/content/10.11...
21:49 Check out our Redbubble: www.redbubble.com/people/RaptorChatter/shop

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13 июл 2024

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Комментарии : 66

@zombiedad 2 года назад

Wow! Thanks Raptor Chatter. Lots of activity in May. Lol. Spinosaurus is like alchemists trying to turn lead into gold

@RaptorChatter 2 года назад

Yeah, the Spinosaurus dialogue is all over the place

@kuitaranheatmorus9932 2 года назад

May sure was a splendid for many and I love it Also great video Hope yall have a good day

@Turdfergusen382 2 года назад

This was a cool episode. I liked the bit about the Trilobites.

@RaptorChatter 2 года назад

Thanks! And yeah, we're still learning more about trilobites that have been found decades ago, so there's still a lot to do in paleontology.

@sandsxgg 2 года назад

I stumbled on the channel a few months ago and I'm m glad I found it, keep up the awesome content I look forward to seeing it grow

@RaptorChatter 2 года назад

Thanks!

@occamsrayzor Год назад

I only discovered this channel two days ago, and I have to say thank you for an absolute goldmine of previously unknown (to me) information!

@RaptorChatter Год назад

Glad you've enjoyed it!

@AcroLearn 2 года назад

Just stumbled upon this channel and I gotta say, your content is amazing and this channel is severely underrated.

@DrBunnyMedicinal 2 года назад

So, what I'm taking away from that Spinosaurus segment is: "Spinosaurus was *not* a duck." ;D Also, the idea that trilobites may have been closely related to chelicerates such as arachnids and xiphosurans. That's just a bit of a mind-blowing idea, and I'm certainly going to be interested in hearing more about this hypothesis, as, when and if it develops further. (Also, loved the trouble you had with continuing the 'dueling pre-published papers' bit. Scientists get mighty emotional about their and their colleagues' work, funnily enough.)

@RaptorChatter 2 года назад

The big problem with a lot of the early arthropod stuff is there is a lot of convergence and divergence happening, so it's really hard to be clear about what animals belong where in the phylogeny. So there's still a ton of debate about this.

@williamchamberlain2263 2 года назад

MegaDuck

@ethanjones6139 2 года назад

Dude. We all saw that paper that came out with definitively definite facts that definitively shows Spinosaurus was mostly an airborne flying dinosaur. Definitely.

@MaryAnnNytowl 2 года назад

The Trilobite thing is fascinating, but the Spinosaurus thing is freaking seriously entertaining! Don't blame you a bit for laughing!

@RaptorChatter 2 года назад

It's exhausting.

@barrybarlowe5640 Год назад

I think Spinosaurus was like a grizzly bear. It may not have swum, to hunt. It's front legs and head are designed from what I've seen, for catching fish, though it could have used its claws for digging out lung fish in the dry seasons. A sort of near water anteater or pangolin.

@thedoruk6324 2 года назад

I wonder how in the actual reality of universe the people explain the Spinosaurus fossils explored in far inland africa as well as many places that are far off from any major sources of water besides several Spinosaurus populations were more terrestrial than others besides the sigilmassasaurus

@onandonitgoes5957 2 года назад

Well... They could be more terrestrial... Or... There simply could have been a nearby water source at the time we're unaware of now

@thedoruk6324 2 года назад

@@onandonitgoes5957 I mean far far inland africa like mali niger and chad where even in early cretaceous had no riverbed delta or large lakes The study shows this and with a map and the location of the specimens

@RaptorChatter 2 года назад

Yeah, there's just so much that's been going on with it I didn't want to spend a bunch of extra time explaining everything in a monthly video. Once they're all officially out I may do a video just on the more recent Spinosaurus stuff in better detail.

@thedoruk6324 2 года назад

@@RaptorChatter Agreed I cannot wait for it I already subscribed to your channel so I definitely look up to it!

@lynnclapper997 7 месяцев назад

I spit out my coffee when you said Spineosaurus didn't exist

@EvilSnips 2 года назад

Hello I just found your channel and am watching a lot of the videos! Really informative and good content! I was curious, will you or have you ever done a tour of your fossil collection? Lots of cool specimens behind you!

@RaptorChatter 2 года назад

We already had a video on it, ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-CFc5uiqRkDY.html

@EvilSnips 2 года назад

@@RaptorChatter Thanks! I'll check it out!

@sampagano205 2 года назад

Is there any way paleontologists could test for the type of part time endothermy you see in tegus in those large ornithischians?

@RaptorChatter 2 года назад

Maybe? They do at least mark Varanus as being loser to warm-blooded, but it doesn't look like they used any Teiids, which include tegus. So it could be an interesting test to do for just the evolution of lizards as well.

@Neriedar 2 года назад

Honestly has no one considered spinosaurus using a sit/ lay down in wait process? Like not full snapping turtle with tongue lure but it would be useful in major flooding scenarios when bank/shore gets flooded. Like darn my best fishing spot is all Underwater, I’m gonna lay down and pretend to be a log and occasionally poke my nose up for air maybe fish will swim past.

@williamchamberlain2263 2 года назад

Makes sense. Or like crocs/gators - tail or back feet on the floor, body diagonally up, head on the surface --> watch out for a thirsty victim coming down to the water's edge, then use that slow paddle to approach underwater, and all four limbs to accelerate up and out in the final lunge.

@patreekotime4578 2 года назад

Seems like bone density would be a huge factor in that. If they were too light to actively dive, they were definitely too light to sink to the bottom and wait. You would also expect there to be adaptations for that lifestyle that would be obvious. Like nasal passages at the top of the head, enlarged lung capacity, and a much slower metabolism.

@thedoruk6324 2 года назад

+Neriedar that would still make active traverse and inhabitation of proposed deeper and denser bodies of water impossible or extremely unlikely alas we also have spinosaurus fossils from far too inland areas where there really was no bodies of water

@thedoruk6324 2 года назад

@@patreekotime4578 indeed alas the nasal passages in spinosaurids like spinosaurus irritator and suchomimus are quite the contradictory for that reason

@RaptorChatter 2 года назад

The problems with that are better addressed in the Hone & Holtz, 2021 paper we did a video on, but the nostrils aren't really where you'd expect for an animal spending a lot of its time underwater, but if there is a flood there's nothing to say the fish would still be there, and being able to move to new grounds might be more effective.

@rydrakeesperanza5370 2 года назад

What are they doing to my favourite Spinosaurus... My first encounter was a documentation of who knows how many years ago and there it had a posture more like a T. rex than a more quadrupedal one. Oh, and they said it dies when it falls on its side because then its spine breaks. I can't wait to hear when scientists know more if it was more or less aquatic and what its posture was....

@RaptorChatter 2 года назад

Yeah, it has been a historically very poorly understood animal. The original got blown up, then there were only a few small pieces, then it was in JP3, which got it famous for beating the Tyrannosaurus in that movie, and then everyone needed it in their documentaries, even though it was, and remains poorly understood.

@Lowlandlord 2 года назад

Curious how comparable one "gut biome" would be to another in the same species. In humans they they can be fairly different, with like only 20% of us producing methane (which is a byproduct of the gut fauna), as far as I know, not that I am any kind of expert. Just my understanding is that there can be some differences even in the same species. Isn't Michael Phelps TECHNICALLY a fish though? :P

@RaptorChatter 2 года назад

Michael Phelps is a fish technically in the same way we all are I suppose lol. As for gut biomes there would certainly be some variation, but general trends are still useful to have. And this is one of the first studies on that, so general trends are really all we should expect.

@danhoude2749 2 года назад

Yo zeke!! 👍

@AnimeSunglasses 2 года назад

The increasing exasperation in how he says "Don't go extinct".... what a mood!

@RaptorChatter 2 года назад

Yeah... it's been an exhausting few years.

@barrybarlowe5640 Год назад

I would seriously question groups that supposedly swung from cold blooded to warm blooded and back again. Adaption follows convenience. I feel that large theropod lost their arms (almost) because arms steal resources and if they are not critical to food gathering, they will, over time, disappear. The same thing happened with the terror birds. Warm bloodedness is too useful. If you think you have something reverting to a less flexible state, first find out why, or better question what you think you see. For example, compare in the same way, animals that hibernate. Think!!

@miller6677 2 года назад

_Spinosaurus_ is definitely worth the "drama" (17:57). Those who want to claim it was a pathetic swimmer that could merely wade beside the waters like a beachcomber as it fed like a heron, do need to explain sometime the gigantic sail on its back that would have prevented this remarkable creature from rotating in the water as it swam.

@thedoruk6324 2 года назад

+Miller uh quite the contrary the sail quite dragged the animal down as well as being a contributor to buyoauncy crisis and the animals extreme unstablity in water alas you as a person that supports the entirely water dependant spino theory supporter need to explain the tails immense inability to swim or drag the theropod around the animaks incapacity to dive as well as being a terribly inefficent swimmer it cannot hunt underwater Alas there are also fossil extractions of several spinosaurus instances that discovered far too inland literally away from any known sources or bodies of water like there were according to papper several discovered in the middle of north africa like chad or niger

@kartamarasevered3685 2 года назад

uh you are eswentially told everything wrong there are extreme amounts of anatomical features that disable the aquatic spino speculative theory from the position and area of nostrils to the fact that its boyuoancy as well as its tail being literally useless at swimming not only that but the animals whole anatomy shows that it was unable to dive and was an extremely terrible swimmer not to mention literal fossil records that have been extracted from far inland africa on land where away from literally any source of water like lakes deltas even a puddle of water

@miller6677 2 года назад

@@thedoruk6324 Alas, your description is filled with errors. These include, but are not limited to, your claim the sail "quite dragged the animal down" and other comments, and also your assumption that, " ... alas you as a person that supports the entirely water dependant spino theory supporter need to explain ..."; I never said the _Spinosaurus_ was entirely water-dependent. There are some great videos about what is being learned about this marvelous beast on RU-vid, particularly those including paleontologist Nizar Ibrahim.

@thedoruk6324 2 года назад

@@miller6677 I tried to summarize the entire study just in a mere comment gave me some space meanwhile you feel free to immediately jump into your own conclusion like it is hay day also all of my points have been openly proclaimed and shown in the new papper Quite the opposite nizar has shown time and time again has rather air highly speculative and speculation based theories and conclude his own ideas There are several palaeontologists openly disagree with him from serano to dr hone and holtz and henderson there are many

@miller6677 2 года назад

@@kartamarasevered3685 Perhaps you are confusing _Spinosaurus_ with the spinosaurid _Suchomimus_ ? The nostrils of _Spinosaurus_ , are well-positioned for an animal near or at the top of the water, and are posterior to the position on terrestrial dinosaurs; the bones' density was like that of penguins. Do you think the somewhat similar tail of an alligator is also "literally useless at swimming"? It appears to me you have literally made errors in each statement you made. There are great resources online for beginning to learn about this _very_ interesting dinosaur. Have a great day.

@t-r-e-x452 2 года назад

here's my theory on Spinosaurus: it was both and it depends on the season. During the wet season it hunted underwater snagging large fish while during droughts it hunted on the water's edge and could also hunt on land.

@thedoruk6324 2 года назад

+Gabroel Clark the potential that it could hunt on land it quite higher as the aforementioned paper also includes several instances of spinosaurus specimens that have been discovered far off inland away from any source of water like lakes deltas or even larger puddles

@RaptorChatter 2 года назад

Like the other commenter said there's good evidence that it wasn't only around water, and that it wasn't even that well adapted to going underwater. While it's an interesting idea to say it hunted underwater there really needs to be more evidence for that first.

@Geathsrighthand 2 года назад

@@RaptorChatter since you can find crocodilians a semi aquatic group of animals that will still hunt on land and in water could you not say that it was both as well as the fact that it spent more time as a quadruped than a biped and the fact that it's Jaws alone were not actually strong enough to take the stress of a full on assault you could call it a ambush predator in and out of the water

@Shaden0040 2 года назад

Nichael Pjelps has HUGE paddle0like hands ad feet, So he is adaoted to an aquatic lifestykw to some defree,

@thedoruk6324 2 года назад

Quite the contradictary so no

@RaptorChatter 2 года назад

But even still, with training isn't as fast as animals which are designed to swim. He would still be easily outpaced by something like a crocodile for example.

@thedoruk6324 2 года назад

@@RaptorChatter alas the prey animals could easily outpace him too lol !

@RaptorChatter 2 года назад

I chose the croc because it's semi-aquatic and still faster than the Spinosaurus would be. I thought it would be a better comparison. But yep. Even prey would get away from Phelps

@thedoruk6324 2 года назад

@@RaptorChatter exactly even the least semi aquatic animal had extreme adaptations and advantages compared to spino

@skidmark7845 2 года назад

I like your knowledge and information about these creatures although evolution is a lie. We have a creator and that is God! The world is not millions of years old.