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Dr. Polaris
United Kingdom
เข้าร่วมเมื่อ 24 มี.ค. 2019
Welcome to my channel! My name is Dr. Polaris and I'm quite the curious bear. Here you will find fun, educational videos on a variety of topics, including Zoology, Paleontology and History. If you are also interested in Speculative Evolution, you have come to the right place. You can find my own personal spec zoo project, detailing the history of an alternate universe where the K-PG mass extinction never took place at DrPolaris at Deviantart.
Radiodonts: 'Giants' of the Cambrian
The Radiodonts were a highly diverse lineage of Stem-Arthropods that emerged as part of the famous Cambrian Explosion, quickly developing large sizes for their time and moving into carnivorous niches.
www.patreon.com/c/DrPolaris
www.deviantart.com/drpolaris
Sources used for this video:
Bicknell RD, Schmidt M, Rahman IA, Edgecombe GD, Gutarra S, Daley AC, et al. (2023-07-12). "Raptorial appendages of the Cambrian apex predator Anomalocaris canadensis are built for soft prey and speed". Proceedings of the Royal Society B: Biological Sciences. 290 (2002).
Cong, Pei-Yun; Edgecombe, Gregory D.; Daley, Allison C.; Guo, Jin; Pates, Stephen; Hou, Xian-Guang (2018). "New radiodonts with gnathobase-like structures from the Cambrian Chengjiang biota and implications for the systematics of Radiodonta". Papers in Palaeontology. 4 (4): 605-621.
Daley, Allison C.; Budd, Graham E.; Caron, Jean-Bernard; Edgecombe, Gregory D.; Collins, Desmond (2009). "The Burgess Shale anomalocaridid Hurdia and its significance for early euarthropod evolution". Science. 323 (5921): 1597-1600.
De Vivo, Giacinto; Lautenschlager, Stephan; Vinther, Jakob (28 July 2021). "Three-dimensional modelling, disparity and ecology of the first Cambrian apex predators". Proceedings of the Royal Society B: Biological Sciences. 288 (1955): 20211176.
Moysiuk, J.; Caron, J.-B. (14 August 2019). "A new hurdiid radiodont from the Burgess Shale evinces the exploitation of Cambrian infaunal food sources". Proceedings of the Royal Society B: Biological Sciences. 286 (1908): 20191079.
Paterson, John R.; García-Bellidob, Diego C.; Edgecombe, Gregory D. (10 July 2023). "The early Cambrian Emu Bay Shale radiodonts revisited: morphology and systematics". Journal of Systematic Palaeontology. 21 (1).
Pates, Stephen; Daley, Allison C.; Butterfield, Nicholas J. (2019). "First report of paired ventral endites in a hurdiid radiodont". Zoological Letters. 5 (1): 18.
Van Roy, Peter; Daley, Allison C.; Briggs, Derek E. G. (2015). "Anomalocaridid trunk limb homology revealed by a giant filter-feeder with paired flaps". Nature. 522 (7554): 77-80.
Vinther J, Stein M, Longrich NR, Harper DA (March 2014). "A suspension-feeding anomalocarid from the Early Cambrian" (PDF). Nature. 507 (7493): 496-9.
Wu, Yu; Pates, Stephen; Pauly, Daniel; Zhang, Xingliang; Fu, Dongjing (2023-11-03). "Rapid growth in a large Cambrian apex predator". National Science Review.
www.patreon.com/c/DrPolaris
www.deviantart.com/drpolaris
Sources used for this video:
Bicknell RD, Schmidt M, Rahman IA, Edgecombe GD, Gutarra S, Daley AC, et al. (2023-07-12). "Raptorial appendages of the Cambrian apex predator Anomalocaris canadensis are built for soft prey and speed". Proceedings of the Royal Society B: Biological Sciences. 290 (2002).
Cong, Pei-Yun; Edgecombe, Gregory D.; Daley, Allison C.; Guo, Jin; Pates, Stephen; Hou, Xian-Guang (2018). "New radiodonts with gnathobase-like structures from the Cambrian Chengjiang biota and implications for the systematics of Radiodonta". Papers in Palaeontology. 4 (4): 605-621.
Daley, Allison C.; Budd, Graham E.; Caron, Jean-Bernard; Edgecombe, Gregory D.; Collins, Desmond (2009). "The Burgess Shale anomalocaridid Hurdia and its significance for early euarthropod evolution". Science. 323 (5921): 1597-1600.
De Vivo, Giacinto; Lautenschlager, Stephan; Vinther, Jakob (28 July 2021). "Three-dimensional modelling, disparity and ecology of the first Cambrian apex predators". Proceedings of the Royal Society B: Biological Sciences. 288 (1955): 20211176.
Moysiuk, J.; Caron, J.-B. (14 August 2019). "A new hurdiid radiodont from the Burgess Shale evinces the exploitation of Cambrian infaunal food sources". Proceedings of the Royal Society B: Biological Sciences. 286 (1908): 20191079.
Paterson, John R.; García-Bellidob, Diego C.; Edgecombe, Gregory D. (10 July 2023). "The early Cambrian Emu Bay Shale radiodonts revisited: morphology and systematics". Journal of Systematic Palaeontology. 21 (1).
Pates, Stephen; Daley, Allison C.; Butterfield, Nicholas J. (2019). "First report of paired ventral endites in a hurdiid radiodont". Zoological Letters. 5 (1): 18.
Van Roy, Peter; Daley, Allison C.; Briggs, Derek E. G. (2015). "Anomalocaridid trunk limb homology revealed by a giant filter-feeder with paired flaps". Nature. 522 (7554): 77-80.
Vinther J, Stein M, Longrich NR, Harper DA (March 2014). "A suspension-feeding anomalocarid from the Early Cambrian" (PDF). Nature. 507 (7493): 496-9.
Wu, Yu; Pates, Stephen; Pauly, Daniel; Zhang, Xingliang; Fu, Dongjing (2023-11-03). "Rapid growth in a large Cambrian apex predator". National Science Review.
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My opinion is the polar bear wearing the bowler hat....is most likely to be factual 😁
WHAT DO THEY TASTE LIKE?
I have a question: do Anomalocaris and trilobites have any modern relatives?
What if the only time when Anomalocaris eat trilobites when the trilobites gather together to shed their shells, like when spy crabs come together to molt their shells then along comes the string ray and ate a soft spy crab out of it's old shell, if you know what I'm thinking?
The moon amazing animal group! Complete aliens, reality is stranger than fiction
*most
The Kamala Harris
What about the Radiodos? They always get left out
An AI image as thumbnail. That's disappointing
It's not AI
@ivankwan9264 You're telling me that bipedal monstrosity isn't AI? I really doubt that
Did you just say believing that a Dinosaur species could be alive in the Congo is racist? 😂
6.7
wondering if there was a jellyfish period ? pre Cambrian?
The image starting at :33 is actually NOT depicting the Cambrian; it's the Middle Ordovician Castle Bank Lagerstatte. Anyway, great video, thanks
I once found a fossil radiodont. Been interested in them ever since
If there is an option for creators to block automatic translation: Please do it. I'm sick of pretending I'm from New Zealand to avoid that AI generated garbage.
Thank you for Radiodont video. 🤩
The fellas! I'd argue that Anomalocaris is the mascot of the Cambrian
Fuck yes, this is what I needed
Whats the music of these videos? I find it hauntingly evocative
Love this period of Earth history
I am a big fan of the Amplectobeluidae, with their appendages evolving into more claw like structures, and evolving very basic gnathobase (basically mouth plates, or jaws) structures to enhance their mouths. These were Radiodonts that were adapting many new and important features that might have carried them forward.
Had no idea radiodonts were so diverse and so persisent.... You mentioned Morroccan paleofauna... if you're doing more invertebrates, some of the amazing trilobites from there couldcertainly stand comment, e.g., "Walliserops trifurcatus"... one wonders if this one didn't lash out at prey like a "true" chameleon.
Whenever an Anomalocaris pulled up onto the scene, "Wake Me Up Inside" by Evanescence started playing.
Radiodonts are marvelous -- especially the late, filter-feeding ones. Whales before whales.
I am addicted to anomalocaris and was SO THRILLED to hear you were gonna cover them (you mentioned it at the end of your cold dinos video) and I was not disappointed! I have all sorts of nom-nom stuff, plushies, stickers, buttons/pins, and even a really neat print in my bathroom!! Thanks for a great upload!
I think anomalocaris was not only a fascinating animal but kinda cute too.
Dilophosaurs next week. There are some of their footprints about an hour away from where I live, right in the side of the road, , though the footprint is called “eubrontes”
Happy happy Joy joy Dr. Polaris has posted!
I bet they tasted like lobster
They look like they would be good with some butter and lemon or lime.
I bet they’d be quite tasty
Very nice. Looking forward to the Dilo video!
Same
*WAKE ME UP INSIDE*
The cambrian and ordovician are by far my favourite periods. The Fauna was so fascinating
I like how radiodonts see representation in Pokémon and Yu-Gi-Oh. Pokémon has Anorith and it's evolution Armaldo, who are based off of Anomalocaris, while Yu-Gi-Oh has Paleozoic Anomalocaris and Paleozoic Cambroaster. The real world inspirations for fossil Pokémon would make for an interesting video, now that I think about it. I love how there's an actual pterosaur named Aerodactylus, so there's a pterosaur named after a Pokémon that's inspired by pterosaurs.
Did you hear that Canada? Australia now has the biggest radiodont. What are you gonna do??
Seeing you cover the Radiodonts makes me hope for an episode on the Eurypterids
always glad to see new uploads! 😊 dilophosaurus is also my fav dinosaur! 🦖
"Embracing Beast" sounds like a Bloodborne boss
Kinda looks like one too, if you changed the color palette a bit!
Also a *My ex joke*
You could _technically_ translate it as “hug monster” if that makes it any better.
@@IC1101-Capinatator went from bloodborne to childrens tv show real quick lol
It would be so cool to keep some of these creatures in a fish tank. I wonder if their bite would hurt, or be dangerous.
Nice episode. I was hoping that you would be looking into cryptids for the next episode. But still looking forward to the Dilophosaurus episode.
Cambrian - one of if not the most important eras. What was THE most important ??
I'm curious about how the filter feeders brought their catch into their mouths. Large filter feeders today swim forward catching small prey directly in their mouths, or else swim up through a shoal and use their baleen to squeeze the water out and keep the catch in their mouths. These radiodonts appear to have their filters hanging down, which would mean they'd have to bring their catch to their mouths. Did they pulsate these appendages similar to corals and tube worms, sweeping plankton into their mouths? Did they use suction to pull the plankton in, or did they have a tongue of some kind? They obviously filled a similar niche to large filter feeders of today, but their morphology suggests a different method of feeding.
i dont think we can discern that from fossils alone.
I envision them flexing the barbs alongside the appendix almost simoultaniously in a pattern that resembles mechanical or even ritmic yet very organic. I also believe that these creatures were far more flexible or "squishy" than the fossils make them appear just like what happens with shrimp or artemia today. Also its more than probable that each species had one or more prefered movement and technique to feed, maybe one used both appendixes and then sucction or more like filter shrimp do today
@@anditwasknownas Interesting. That sounds reasonable.
When 2 meters long was gigantic size for animals.
I met someone who's 196 cm tall just last week. He seemed pretty gigantic. 😄 That said, I used to do work for ESPN and did one shoot with some of the Celtics players. You just don't realise how tall these guys really are until you're standing next to them.
Seeing you do more fossil invertebrates is always really nice! As someone who did a video series on trilobites plus an Iceberg I think fossil inverts get the short stick
I knew about radiodonts but didn't know they were the group from which we got Arthropods (and all that follows). When the video snuck that in at the end, I had to do a double-take! Crazy just how successful this lineage has been.
And fun fact about arthropods, the maybe related to earth worm
"Schinderhannes" is one of the more fun scientific names. For the non-Germans: Schinderhannes was the nickname of one Johannes Bückler, a notorious highwayman and murderer of late 18th / early 19th century Germany. The list of his crimes is endless, he committed about every felony possible until his execution in 1802.
Please cover glyptodonts!
Please do cover the kayenta formation. It's a location that hasn't been done justice yet.
Hey Dr. Polaris, why don't you get to think of a suggestion and creating a TH-cam Videos all about the evolution and the history of the Prehistoric Marine Reptiles called the Protostegidae (Protostegas), the Extinct Marine Testudines (Turtles) that may have thought to be are the relatives to the Extant Leatherback Sea Turtles, such as Archelon, Atlantochelys, Bouliachelys, Calcarichelys, Chelosphargis, Cratochelone, Desmatochelys, Iserosaurus, Kansastega, Notochelone, Protostega, Rhinochelys, Santanachelys, Teguliscapha, Terlinguachelys, Pneumatoarthrus, and Ocepechelon in the next couple of weeks to think about that one coming up next?!⭐️⭐️⭐️⭐️⭐️👍👍👍👍👍
Hey Dr. Polaris, right after the evolution and the history of the Dilophosaurs, why don't you get to think of a suggestion and creating a TH-cam Videos all about the evolution and the history of the Prehistoric Marine Reptiles called the Protostegidae (Protostegas), the Extinct Marine Testudines (Turtles) that may have thought to be are the relatives to the Extant Leatherback Sea Turtles, such as Archelon, Atlantochelys, Bouliachelys, Calcarichelys, Chelosphargis, Cratochelone, Desmatochelys, Iserosaurus, Kansastega, Notochelone, Protostega, Rhinochelys, Santanachelys, Teguliscapha, Terlinguachelys, Pneumatoarthrus, and Ocepechelon in the next couple of weeks to think about that one coming up next?!⭐️⭐️⭐️⭐️⭐️👍👍👍👍👍
From the age of strange shrimp!
Happy to see more invertebrate coverage from you! They're so underrepresented. The only other person whose done stuff on them is a much smaller creator
I’m definitely going to cover lobopodians in the future!
Hey Dr. Polaris, right after the evolution and the history of the Dilophosaurs, why don't you get to think of a suggestion and creating a TH-cam Videos all about the evolution and the history of the Prehistoric Marine Reptiles called the Protostegidae (Protostegas), the Extinct Marine Testudines (Turtles) that may have thought to be are the relatives to the Extant Leatherback Sea Turtles, such as Archelon, Atlantochelys, Bouliachelys, Calcarichelys, Chelosphargis, Cratochelone, Desmatochelys, Iserosaurus, Kansastega, Notochelone, Protostega, Rhinochelys, Santanachelys, Teguliscapha, Terlinguachelys, Pneumatoarthrus, and Ocepechelon in the next couple of weeks to think about that one coming up next?!⭐️⭐️⭐️⭐️⭐️👍👍👍👍👍
Hey Dr. Polaris, why don't you get to think of a suggestion and creating a TH-cam Videos all about the evolution and the history of the Prehistoric Marine Reptiles called the Protostegidae (Protostegas), the Extinct Marine Testudines (Turtles) that may have thought to be are the relatives to the Extant Leatherback Sea Turtles, such as Archelon, Atlantochelys, Bouliachelys, Calcarichelys, Chelosphargis, Cratochelone, Desmatochelys, Iserosaurus, Kansastega, Notochelone, Protostega, Rhinochelys, Santanachelys, Teguliscapha, Terlinguachelys, Pneumatoarthrus, and Ocepechelon in the next couple of weeks to think about that one coming up next?!⭐️⭐️⭐️⭐️⭐️👍👍👍👍👍
Would you mind sharing who you watch that does them? Always looking for new Paleo channels and it's rare to find ones that talk about invertebrates.
@Accountnolongerexists interestingly he's left a comment here. The Dark Master The Dark Master is the guy. He's done a number of videos on invertebrates. Though keep in mind he also has other video series as well so isn't exclusively a paleotuber has stated he's planning on doing more naturr/paleo videos once he finishes a few Lego sets he has to review. But there is enough of a backlog to enjoy