Elasmocast

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@Dman9fp 6 күн бұрын

Just an additional fact- Greenland sharks may live many hundreds of years but they live with Super Slow metabolism. So thet have quantity but at the cost of quality, at least of aesthetics of being a hyper predatory shark. I have to brush up on knowledge to know if they can even swim quickly in bursts if need be, but I wouldn't be surprised if they cannot. No such thing as a free lunch in the animal kingdom, there always seems to be tradeoffs, especially in hospitable environments like in the cold waters those sharks inhabit Edit: & Hemipristis is more winner than loser, still surviving in the Anthropocene somehow & after so many environmental changes. Sand tiger sharks died out in lots of places arpund the world are they a loser? Lots of factors as to why local extinctions occur but they survive elsewhere, that we probably cannot fully understand. Lots of mammals and birds died out in the K-Pg but apparently because they radiated in diversity soon after, they were nothing but a success over the ages lol.. Hard not to get behind calling something good luck/ fortune sometimes, at least when there's lack of knowledge as to when 2 similar things have different fates over time edit 2: to even last 1 Million years as a species is a success. In the grand scheme of things, it's a drop in the bucket. But loads of generations are required to last that long, yes even as a greenland shark. & competing in the wild natural world/ adapt or die off. Reccommend anybody to look up the website that shows 1 millions dots (pretty sure the paleocast guy reccomended it/ that's where I found it iirc) but that thing goes on and on and on. One thousand by one thousand sounds a lot more than "merely 1 million", but it's still a lot

@elasmocast 4 күн бұрын

Thank you for your thoughts and insight! When it comes to “winners and losers”, it really comes down to a “glass half empty/glass half full” type of debate. If something survived for millions of years, we may call it a winner, or we may call it a loser for eventually becoming extinct. It’s a discussion that’s based on perception, rather than necessarily being “right or wrong”.

@Dman9fp 4 күн бұрын

@@elasmocast Yeah Exactly. It's still fun to judge & compare, keep doing your thing. "Lord knows" if I wasn't having some moments with exploring rivers while in my 30s I'd probably be making more elasmobranch evolution podcasts, might do so soon anyways, but as of present no definite expectations/ just on hiatus for that solo podcast. For sure Lots to discuss about fossil sharks & their evolution, way more than most people realize hah

@catfishcain 7 күн бұрын

Nice, that formation is top on my list for wanting to visit enable to fossil hunt. Sweet finds, I hope you're able to find some within the dirt you brought back with you.

@elasmocast 7 күн бұрын

Thank you, it was one of my bucketlist formations for years as well!

@oliviafiregarden2007 14 күн бұрын

Megalodon is over rated anyway

@elasmocast 14 күн бұрын

As much as I love megalodon, I do think that there are many more interesting extinct chondrichthyans!

@derekhurt9983 14 күн бұрын

"7:30" peripristis. I've got a couple specimens from that species they are tiny compared to that one but I know I do because I've had a vertebrate paleontologist look at one and he ID it as peripristis semicircularis that's crazy. found in Texas

@elasmocast 14 күн бұрын

Very nice! Yeah, Peripristis get dwarfed by the size of Megactenopetalus. Peripristis teeth can be hard to come by, especially in good condition as the teeth are so thin and fragile.

@seanwright4277 14 күн бұрын

Excellent Ben never heard of this shark before.

@elasmocast 14 күн бұрын

I’m glad you enjoyed the video! It’s a lot less-well known than many other sharks and shark relatives, likely due to scarcity of their fossils.

@michaelreed4744 24 күн бұрын

Hello. Are some of the fossils and skeletons copies from other museums?

@elasmocast 24 күн бұрын

Hello, I believe you are correct! There are some casts that were at the show and featured in this video

@x1mpressed Ай бұрын

They aren't sharks tho Modern sharks appear around the Jurassic also known as selachamorphs Which I believed some even co existed with hybodonts and ctenacanths Some are holocephalans Correct me if I'm wrong tho

@elasmocast Ай бұрын

You are correct in that the modern sharks we know today (the Galean and Squalean Sharks) aren’t known earlier than the Early Jurassic, though true selachians date back to the Early Permian with Synechodus antiquus. You are also right that true sharks (selachians) did coexist with hybodonts and ctenacanths. Ctenacanths in the Mesozoic are questionable (in my opinion the Cretaceous “ctenacanths” are likely selachians convergently evolving similar teeth), though they certainly coexisted at the same time as the earliest Synechodus. On this list, some are more distant relatives to sharks, falling under Euchondrocephali, whereas others are closer related to sharks, also belonging within Elasmobranchii. I hope this helps!

@x1mpressed Ай бұрын

@@elasmocast ayo didn't expect a reply. love your content and I also love learning about Chondrichthyans

@elasmocast 29 күн бұрын

I’m glad you enjoy the content! Are there any chondrichthyan topics you’d like to see a video covering?

@x1mpressed 27 күн бұрын

@@elasmocast cladoselache and relatives, early chondrichthyan evolution holocephalans and elasmobranchs split or maybe early lamniform evolution IDK just some topics I'd like to see

@elasmocast 26 күн бұрын

I think you’ll enjoy these videos! A Review of Chondrichthyan Evolution by Geologic Time Periods kzfaq.info/get/bejne/nqt5naWCv8vVdoU.html This one goes over early chondrichthyan evolution, up until modern day, and includes early holocephalans, Cladoselache, and many more! Elasmocast Episode #3: Killer Ctenacanths w/ JP Hodnett kzfaq.info/get/bejne/eqiWhaVlssDPZ5c.html This podcast episode delves into another cladodont order, the Ctenacanthiformes, and also discusses debates as to phylogeny of Paleozoic chondricthyan groups. Funnily enough, I actually have a script completed for Early lamniform evolution, just never got around to recording it. I’ll have to put that one on que!

@powercage Ай бұрын

Bro, your hair is crazy.

@elasmocast Ай бұрын

Haha perhaps a haircut would be welcomed in the near future

@dansilberstein326 Ай бұрын

“Wow look at this weird tooth I found wonder what it’s from” *fabricates an entire creature and backstory based on nothing but a tooth* “It’s fuckin’ SCIENCE, bro.”

@elasmocast Ай бұрын

Many of these and other extinct sharks and relatives are known from articulated body fossils, which is where many of these renderings are based off of. Teeth are by far the most common fossils found from these animals (their cartilaginous skeletons don’t easily preserve, whereas their teeth do and are shed frequently), but that does not mean more complete remains of either that exact species, or close relatives, weren’t also discovered, which can allow artists to reconstruct what these animals may have looked like.

@dansilberstein326 Ай бұрын

@@elasmocast the problem is the skeleton doesn’t show the whole picture. You could ask 2 artists to recreate it and get vastly different results. My issue is with science being unscientific. When they say it is some way, or treat something as a fact when at best, it’s their best educated guess. Just like dinosaurs, were they lizards or birds? They used to be depicted one way, and that’s “how it is” and now it’s different, yet the fossils never changed. Science is about observation and experiments. Don’t sell me your imagination.

@elasmocast Ай бұрын

Yes you are right, skeletons don’t show everything, and I agree, I also dislike the ‘unscientific’ recreations that are sometimes created without much factual backing. Some dinosaurs, for example, we have a fairly solid idea of what they would’ve looked like when they were alive; when an entire animal is constructed off of a partial fossilized femur I get very skeptical lol. I think that some older models that, while now known to not be accurate, aren’t necessarily unscientific. A lot of times reconstructions are created off of the available scientific information observed by the time, and become outdated not because of them making stuff up out of thin air, but because new discoveries wind up shedding light on new aspects previously unthought of. In my opinion, in good paleo art there’s a combination of as much scientific accuracy as possible blended with realistic creativity.

@chasee4973 Ай бұрын

@@dansilberstein326the irony is that almost every animal (excluding ONLY Petalodus) this video highlights actually has fully articulated individuals represented in the taxon’s fossil record. Your little spittle fit about scientific accuracy is ironic and is typical for someone who DOES NOT know what they’re talking about. Keep your opinions to yourself, nobody asked for them.

@nevergonnagiveyouup4753 Ай бұрын

Post Malone

@elasmocast Ай бұрын

Haha I can see it!

@cpuuk 2 ай бұрын

Henry Cavill sure knows a lot about sharks 🙂

@elasmocast 2 ай бұрын

Haha I get that all the time!

@brendadedondeeresrodriguez4978 2 ай бұрын

Hola a mi encantan los fosiles está muy padre ese lugar en dónde es?

@elasmocast 2 ай бұрын

It’s several different venues laid out all throughout the city of Tucson, Arizona. A great place to go for any fossil enthusiast!

@oliviafiregarden2007 2 ай бұрын

You have such a vast knowledge about sharks it’s insane!

@elasmocast 2 ай бұрын

Thank you so much, I appreciate the kind words!

@roberttresemer8226 3 ай бұрын

Very cool piece. Great find. Worth every penny you paid for it.

@elasmocast 3 ай бұрын

Thank you, we agree!

@smokeeater8387 4 ай бұрын

Some people just have a knack for spotting things. Those are so small I wouldn’t have even thought to check it out. I have a hard enough time trying to find arrowheads 😂👍🇺🇸

@elasmocast 4 ай бұрын

Very true. It took me years to find my first tooth here in Arizona! I would love to eventually hunt for arrowheads, if only the law’s weren’t so stringent on them in this state.

@smokeeater8387 4 ай бұрын

@@elasmocast I’m in Missouri but I look mostly on private land. If it’s on private it’s pretty much fair game. Most rivers and creeks have arrowheads in them here and it is usually within the law if they are on the gravel bars. The fossils here at least where I look are fairly hard for me to find. I’m sure they are there but other states are better as far as I know. Southern Missouri was a marsh I think millions of years ago but I’m in mid Missouri above the water line I think

@elasmocast 4 ай бұрын

Private land is the safest way to go for sure. If I recall correctly most of the chondrichthyan teeth I’ve seen from Missouri are from the Paleozoic, and finding those is a very different experience than how, for example, many collectors from the Southeast collect theirs.

@chrisserfass8635 4 ай бұрын

I own a few Megalodon teeth. The biggest one that I have is 5.5 inches long. The two smaller ones are about 3.5 inches long. This place looks incredible with all of the fossilized things of the past.

@elasmocast 4 ай бұрын

That largest one is a very respectable size for a megalodon tooth! This is definitely a place I’d recommend fossil and mineral lovers to attend at least once.

@battlechampion47 4 ай бұрын

Hi, good video! I had a question regarding one of the fossils seen in de video. at 02:41 you can see many associated (?) teeth in different patches of matrix (one with vertebrae). At first I thought they could be from Cretoxyrhina but the lateral cusplets make me reconsider this idea (I'm aware that older species of Cretoxyrhina have lateral cusplets, but I can't be sure as some of the teeth have a different morphologies than those I could see in Cretoxyrhina). You recall which species name it was given in the expo?

@elasmocast 4 ай бұрын

Thank you! Those teeth in question are of Otodus obliquus and were recovered in the phosphate mines around Khouribga, Morocco. Hope this helps!

@brendadedondeeresrodriguez4978 2 ай бұрын

Hola que bello lugar a mi me encantan los fósiles en que parte se encuentra

@thomasburley3 4 ай бұрын

It kinda looks like it is in a small patch of matrix on the Banana? 😂

@elasmocast 4 ай бұрын

There’s definitely some matrix on this specimen. At first I thought it was situated on top of the vertebrae, but upon closer inspection it looks as though the matrix is embedded within the vertebrae’s arch!

@Cyclopeantreegiant 6 ай бұрын

Sfark

@Rex_Thegentleman 6 ай бұрын

🦞

@elasmocast 6 ай бұрын

@@Rex_Thegentleman 🦑

@thechumpsbeendumped.7797 6 ай бұрын

I wonder why they call it the Spear toot… Oh, I see why.

@elasmocast 6 ай бұрын

Haha it’s a very well-named shark!

@user-ti9wm4tz3i 6 ай бұрын

Cop wy is sas 😢😢😢😢😢😢😢😢😢😢😢

@QuestForDetails 6 ай бұрын

fun vid ! just found ya and subscribed !

@elasmocast 6 ай бұрын

Glad you enjoyed the video, and thank you for the subscription!

@Ontario_Rockhound 6 ай бұрын

Beginners luck eh, awesome finds!

@elasmocast 6 ай бұрын

Haha right! And thank you!

@jimkirkland5838 6 ай бұрын

Need to work on your pronunciation... I have been there....

@elasmocast 6 ай бұрын

Thank you for your constructive feedback!

@jimkirkland5838 6 ай бұрын

Spent a lot of days checking out the Kohls Ranch site back in the 80s....

@elasmocast 6 ай бұрын

It’s a great site!

@SunSheepOfLight 8 ай бұрын

Small but savage.

@elasmocast 8 ай бұрын

Indeed!

@SunSheepOfLight 8 ай бұрын

@@elasmocast Yes!

@chrisrego4856 10 ай бұрын

Not my Greenland boys Chase! Those parasites are the real winners, they chose a host that apparently never dies lol

@elasmocast 10 ай бұрын

Haha good point!

@chrisrego4856 10 ай бұрын

Y'all dissing my boy Palaeocarcharodon! It was a pioneer! It got broad, serrated teeth before it was cool! It gambled its life savings but lost the bet. Should've waited. Imagine a bizarro world where archeocetes evolved sooner... Palaeocarcharodon was ahead of the curve! They were Streets ahead! (Nod to all of "Community" friends)

@elasmocast 10 ай бұрын

A gambler that lost is a loser! Haha Palaeocarcharodon did evolve too early for its own good; it’s crazy to think about all of the evolutionary possibilities if events had unraveled differently.

@thomasburley3 10 ай бұрын

It's an interesting point to touch on. Is a highly specialised Shark a winner because it's perfected it's niche, or is it a loser because it's not a generalist and is extremely sensitive to any change in it's environment.

@elasmocast 10 ай бұрын

I think that length of time within a particular niche and success in that niche would constitute whether a shark is a winner or loser. A successful generalist has greater potential for abundance and duration throughout time, making them an evolutionary winner.

@Dman9fp 6 күн бұрын

When environmental conditions are stable & productive- specialists thrive and are clear winners. When times are rough, specialists cannot maintain their success/ numbers as easily as generalists. All depends on the conditions, but sure if we must- the more widespread across time & space a species is (& how many species have evolved out of one subgroup, as the late paleontologist Stephen Gould has done to judge "success") may be a close to objective way in my opinion to judge/ measure

@Dman9fp 6 күн бұрын

But then again, is a super abundant single species more successful than less abundant subgroup but that are super diverse ( a lot of species within a subgroup) &/or occupy a lot of different niches? It can become a pretty subjective and possibly interesting debate I suppose

@mesozoicmarket 10 ай бұрын

Where would Xenacanths go?

@elasmocast 10 ай бұрын

Xenacanths became rapidly diverse and were apex predators in certain ecosystems such as freshwater environments, so I would consider them a winner, even though they aren’t very successful after the End-Permian Mass Extinction and become extinct in the Triassic.

@lesofprimus1 10 ай бұрын

I listened to the whole video and it was extremely interesting... 👍👍

@elasmocast 10 ай бұрын

We’re glad you enjoyed it!

@catfishcain 10 ай бұрын

You tell'em Ben!

@elasmocast 10 ай бұрын

Yessir!

@otodus100 10 ай бұрын

I am old school, I prefer it not being added into Otodus. I have Otodus from the east coast of the US, and abroad, it may have been the precursor. To me however it's just a huge leap in evolution to me. I just do not see it.

@elasmocast 10 ай бұрын

That’s understandable! It is a huge evolutionary feat going from Otodus obliquus to Megalodon. I am in agreement with you that Otodus megalodon isn’t the best placement for the shark.

@user-om5iz8xo8b 10 ай бұрын

Nicely done Ben...those watching will definitely need a good background of biological terms. This will take some time to digest! =)

@elasmocast 10 ай бұрын

Thank you, and yes, having prior understanding to biological terminology would make it a much easier watch!

@lesofprimus1 10 ай бұрын

Very excellent explanation and detailed breakdown of the differentiation between the species. I'll have to chew on it for a bit before committing to Carcharocles.

@elasmocast 10 ай бұрын

I’m glad you found the video informative!

@mesozoicmarket 10 ай бұрын

While it does end up being paraphyletic, I do use Otodus over Carcharocles simply because I misspell the latter all the time, and Otodus is a lot smoother and simple to say.

@elasmocast 10 ай бұрын

That’s fair enough!

@TheBraceletBatch 11 ай бұрын

𝚒𝚍𝚔

@Reece983 11 ай бұрын

dont cry bro its okay

@elasmocast 11 ай бұрын

I’m trying my best:(

@Reece983 11 ай бұрын

@@elasmocast your vids are good and im here for you but you look so sad

@elasmocast 11 ай бұрын

@@Reece983 I appreciate that and thank you for your concern!

@catfishcain 11 ай бұрын

Another great video, learned something new.

@elasmocast 11 ай бұрын

Thank you, and glad you found it informative!

@howardkerr5351 11 ай бұрын

Nice work Ben

@elasmocast 11 ай бұрын

Thank you, Howard!

@willgoacher9122 Жыл бұрын

Great video Ben

@elasmocast Жыл бұрын

Thank you, Will!

@catfishcain Жыл бұрын

As always spectacular video. Keep up the great work

@elasmocast Жыл бұрын

Thank you, it means a lot!

@njfossils Жыл бұрын

This was excellent, well done!

@elasmocast Жыл бұрын

Thank you, very much appreciated!

@Dman9fp Жыл бұрын

Also people tend to think of Megalodon's reign as the "Golden age of sharks". But, Sharks were likely most Abundant & At their Peak Diversity in.... *Drumroll*.... all the way back in the Carboniferous. That's right, no modern sharks yet, but that's when shark-like cartilaginous fish dominated the most they ever would (as far as we can tell) Edit: & to answer "What's my fav time period"... I mean I was Mega obsessed with the Permian in late 2013- some time in2014 (before really getting into FL fossil hunting and starting to be mega obsessed with sharks around 2016 but I found some Very nice shark teeth in 2014, the connections/ first glimmers in the light bulb started there). To each their own, definitely are loads of thought-provoking issues and trends, etc. mysteries and things to discover about the deep past. But... hmm idk how to broach this without being too philosophical/ spiritual. If you start to say "Dang those chirping birds out there, they didn't exist in the Permian!" then perhaps you're missing the point of being born and appreciating our (wierd/ odd/ unsustainable, etc) place in space and time at Present... but then at least if you don't care much about current animals, you Won't Lose Sanity & Much peace of mind over egregious anthropogenic man-caused trends xD.... trade-offs and balances. [I have lived and struggled thru many a mindset/ place in life yes XD]

@elasmocast Жыл бұрын

It is really interesting how diverse Chondrichthyans became in the Late Paleozoic, and how events like the end-Permian extinction event drastically bottlenecked diversity. We do have great species-diversity today, but broader-group level diversity is a mere fraction of what it was before in the Late Paleozoic.

@Dman9fp Жыл бұрын

Solid video. Of course livin' in FL & digging up/ finding their teeth here (west central & south central fl, wait also a bit of north FL), I have the most experience with cenozoic sharks. But once upon a time several years ago, I did buy (off an auction site) a somewhat big bag of North texas Permian rocks chock full of small to "large" Orthacanthus (xenacanthiform swamp "shark") fossil teeth. Great times, wait actually I've got a Waurika Oklahoma small box of permian matrix somewhere too... saved that for a rainy day or someone else, I keep forgetting I own it lol... also man oh boy do Edestus teeth in jaw "Pop" out better in person (as with several other great fossils, like an american lion skull replica, dugong skull replica, Nice Complete Angustidens shark teeth, etc.). Of course when I saw it at a central FL fossil buying/ selling convention, someone beside me said "Genius idea putting that on the top shelf" lmao. Forget how much they were asking, but it was probably more than 1 or 2 grand ($1000-$2000+) if I recall correctly...

@elasmocast Жыл бұрын

A lot of people tend to have most experience with teeth from the Late Cretaceous onwards. With that said, the bizarre Chondrichthyans alive before then are, in my opinion, some of the most interesting taxa out there. Xenacanth teeth and Edestus tooth whorls are prime examples of that. It’s really fascinating thinking about the incredible diversity in Chondrichthyan history!

@howardkerr5351 Жыл бұрын

Hi Ben, great video, I love this content it would be interesting to pick a given geologic marine formation and talk about the shark species found in it as well as the relationships of the existing fauna- HDK

@elasmocast Жыл бұрын

Hello Howard, that’s a great idea! I can think of lots of formations off the top of my head that would be great candidates for something like that.

@catfishcain Жыл бұрын

Awesome video and big congrats to some of those spectacular finds. You definitely need to acquire a couple 5 gallon bucket top sized shifters and collect that smaller material along the surface to search through back at home.

@elasmocast Жыл бұрын

Thank you! That’s a great idea; I did take with me a sandwich bag full of loose sediment to look through at home, but ideally taking more would be better so I don’t have to spend the time and money traveling back and forth to the site.

@mesozoicmarket Жыл бұрын

Nice. I love the diversity and morphologies of Paleozoic chondrichthyans.

@elasmocast Жыл бұрын

The Paleozoic had some of the craziest Chondrichthyans of all time, and were far more diverse than what we have today, on a broader group-level basis.

@darylserafin4339 Жыл бұрын

I would have been tempted to scoop up some of that dirt to take home for fine sifting.

@elasmocast Жыл бұрын

Oh believe me, I did that!

@njfossils Жыл бұрын

Cool finds man! That denticle is awesome

@elasmocast Жыл бұрын

Thank you! I was not expecting to find one of those, especially in that condition.

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