The Ptychodus Enigma
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- Опубліковано 2 жов 2024
- For centuries, a mysterious ancient organism, known primarily from fossilized teeth, has stumped scientists and fossil enthusiasts alike. It had undergone several reclassifications, often based on incomplete fossil remains and hunches using the information accessible to those who studied the extinct animal. Recently, the spectacular finds published in Vullo et al. 2024 provide exciting new insight as to the origin of this long-enigmatic taxon: Ptychodus.
Join Elasmocast host and On Point Fossils owner Ben Goode as he delves into the history of Ptychodus and its multiple classifications, as well as the new publication.
If you love sharks and want to learn more about anything and everything chondrichthyan, please like, subscribe, and hit the notification bell to stay updated on this new paleontology channel!
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Pertinent resources used for this video:
-Senior synonyms of Ptychodus latissimus Agassiz, 1835 and Ptychodus mammillaris Agassiz, 1835 (Elasmobranchii) based on teeth from the Bohemian Cretaceous Basin (the Czech Republic)
www.researchga...
-Scanning electron microscope examination of the dental enameloid of the Cretaceous durophagous shark Ptychodus supports neoselachian classification
www.researchga...
-Micro-computed tomography imaging reveals the development of a unique tooth mineralization pattern in mackerel sharks (Chondrichthyes; Lamniformes) in deep time
www.ncbi.nlm.n...
-Tooth mineralization and histology patterns in extinct and extant snaggletooth sharks, Hemipristis (Carcharhiniformes, Hemigaleidae)-Evolutionary significance or ecological adaptation?
journals.plos....
-Skeletal remains of the oldest known pseudocoracid shark Pseudocorax kindlimanni sp. nov. (Chondrichthyes, Lamniformes) from the Late Cretaceous of Lebanon
www.researchga...
-First Associated Tooth Set of Ptychodus anonymus (Elasmobranchii: Ptychodontidae) in North America from the Jetmore Chalk in Kansas
www.researchga...
-Evolutionary trajectories of tooth histology patterns in modern sharks (Chondrichthyes, Elasmobranchii)
onlinelibrary....
-Articulated remains of the extinct shark Ptychodus(Elasmobranchii, Ptychodontidae) from the Upper Cretaceous of Spain provide insights into gigantism, growth rate and life history of ptychodontid sharks
journals.plos....
-Chondrichthyan tooth enameloid: Past, present, and future
www.researchga...
Mesozoic hybodont sharks from Asia and their relationships to the genus Ptychodus
www.researchga...
-Paleontologists Disagree About What This Exquisite Shark Fossil Actually Is
gizmodo.com/pa...
-Skeletal anatomy of the Late Cretaceous shark,Squalicorax (Neoselachii: Anacoracidae)
www.academia.e...
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 :)
I really appreciate it; the science should come first!
Fucking rad
Thank you!
It's cool that there was a pelagic predator that has specialized for hard shell organisms, unlike typically seen in benthic predators
Agreed! Ptychodus was a truly unique genus
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.
I appreciate the insightful feedback and advice! It was a makeshift setup at a place that wasn’t mine, and I don’t have a background with making videos; I will be trying to improve my quality of visuals and overall execution as I get more experience with content creation. While I love the science, I understand that good audio and visuals are necessary to better engage with audiences; thank you for sharing!
Great content, mind bending fossils
It’s miraculous how well the specimens preserved! I look forward to seeing what other articulated remains from this site get published on in the future.