Hell yeah

We should try to track down the placoderm site near Jerome!

Hatchi!!!

Hatchi! Great fossil hunting!

Dang who’s your editor they did a really good job

Boost

I always enjoy these fossil hunting expeditions you take me to! Obviously ranger Hatchi did too.💕

Excellent video! 🦈

Would this make their closest living relatives chimaeras?

Wonderful info---almost all new to me! Very clear and interesting!

Wonderful presentation--clear and relatable and especially informative to this paleo shark neophyte! Great job Ben!

The sample you guys asked about is quartz (variety: chalcedony). You might try a shortwave UV light on it and it will likely fluoresce a lime green color. It was great working and talking with you today at the Pinal Geology and Mineral Museum. I subscribed! Love the snake too!

the dinosaurs are replicas

It would be helpful to add a photo of the creatures these teeth belong to.

Would love to see if y'all find anything at the creeks. Especially Fossil Creek in Camp Verde.

Definitely think about doing another one of these for chondrichthyes! Maybe could combine both extant and extinct too.

Yes like Jared said make a tier list for ancient animals like the Cretaceous that would be awesome

Cretolamna

This episode is much better than the last, as no one is talking over the others & making weird jokes!

We should do a paper on Carcharocles taxonomy.

To speak to partially serrated species. For a partially serrate blade of O.aksuaticus, do you then call O. obliquus as it is not fully serrate or O. auriculatus which is fully serrate? None of these are true species, just a method of separating them by characteristics. Megalodon could have cuspleted teeth as a juvenile and within its mouth have teeth with and without cusplets simultaneously. So found teeth of the same animal would be called 2 different species if not found as part of a dentition. It is more a method of labeling them and separating them by age and characteristics. This tooth is mid Miocene and has cusplets so it goes in this box labeled chubutensis. This tooth does not have cusplets and is also mid Miocene so it goes in this box labeled megalodon. It is important to note that species DO NOT HAVE sharp boundaries. An old species blends into a new species over a period of time (often short in geologic time but long in human time). In between times, the animal will have some old and some new characteristics simultaneously.

Go uphill until you are out of the shell beds. Then you are above the old shoreline and a few hundred thousand years in time to land creatures and trilobite fossils.have fun always

So most of that area is early Devonian so no bony fish yet, cartilage and crocofish teeth . lol All that area Was a shallow sea fulla clams oysters, just what baby sharks need for developing their cartilaginous skeletons

Aw man, would have loved to join in!

Here in TX, we have the Woodbine which is a similarish sandstone/marginal marine environment of Cenomanian age. I've come across a good handful of Anomotodon principalis out there. Your last tooth is hard to be definitive on, but I think A. principalis is a good choice if you see evidence for lateral shoulders instead of cusplets.

Question: I’m going to study geology in Arizona and I’m wondering if the SPS offers future career opportunities? I know they do volunteer work too which I’m also interested in but I’m wondering if they do careers? Also excellent finds today!!

Engelman was a big help for me for my own dunkleosteus skeletal !

Awesome podcast. Learned a lot. I'm a shark nerd but I dont know a lot about paleontology or placoderms so this was a treat

I've had the oportunity to have a look at a somewhat big sample from morroco and even an associated dentition of Striatolamia and I have to lean in with the sand-tiger affinity. The ammount of variability in this genus is quite big and has major changes in ontogeny and locality.

Potentially something else

Cheer~~~relating to or denoting the era between the Precambrian eon and the Mesozoic era.😊

That `holocephalan denticle' looks like one of the smaller morphotypes of Lagarodus specularis . See Lebedev 2008, Acta Geol. Polonica, vol. 58, 199-204, fig. 2.

Nice Petrodus! You even caught it on camera before catching it with your eyes. They're pretty rare here in Texas

I thoroughly enjoyed the book John.

Great content, mind bending fossils

I can't wait to get the book

A few years ago my family were camped out in the wood near FLAGSTAFF .ARIZONA ! My daughter were walking /exploring the area near our camp ! We found an funny looking “rock” and it had sea shells embedded in it ! BELIVE the “rock “ may have been CORAL (?) it’s still there I so-pose as it was A VERY BIG “ROCK”! ❤ to ALL OF YOU VOTE 🗳️ 💙BLUE AND KEEP IT MOVING FORWARDS 👉🏼👉🏼👉🏼👉🏼👉🏼👉🏼👉🏼👉🏼. 🙀👵🏻😱🖖🏼👽🐲 “

I once thought I had found one of these, but it turned out to be an old Iroquois arrowhead. Still cool, but I was disappointed

My favorite species is the pelagic thresher, they’re the coolest. Their tails can be up to 52% of their body length. I love all Condricthyians but these are my favorite by far.

Your quick video is better than this species entire Wikipedia page

Thank you for clearing up misinformation, as someone who is passionate about sharks it annoys me that shark week isn’t always accurate and doesn’t always help to portray sharks in less of a typical negative light like most media does

It’s amazing to think that the Sahara desert was once ocean. I love sharks

I pet one once, very cool

I love your videos so much, please continue sharing information on Elasmobranchii they’re my favorite

You'd be doing yourself a favor by not aiming the camera at a light that's right behind your head. A better mic wouldn't hurt, either. Tell the truth, your delivery could be improved a bit, too, but mostly, it's that light, right where the viewer is looking that's a problem. Who wants to stare at a light for fifteen minutes? It'd work better if the camera was level with your head, and your head should fill more of the frame. Oh, and relax...you shouldn't need to raise your voice to be heard clearly...listening to a raised voice for long can tire the listener. Just speak normally and adjust your volume after, if it's too faint. Interesting subject; never heard of the critter before...but I haven't paid as much attention to paleontology as I could have...and sharks aren't a high-interest animal for me, either.

do you think the megladon COULD sitll exist

hehe i love how kindly amateur your filming setup is. it's still a super good and informative video! you dont need fancy equipment to make a good video :)

Fucking rad

Paleocarcharodon did not evolve into megalodon , it was a dead end.

It's cool that there was a pelagic predator that has specialized for hard shell organisms, unlike typically seen in benthic predators