Why Sharks Are Covered In Teeth
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Watch the new season of MinuteBody - and get access to both CuriosityStream and Nebula - at http://www.curiositystream.com/minuteearth.
Sharks wouldnt be known for their fierce teeth today if it werent for their ancient scales.
LEARN MORE
**************
To learn more about this topic, start your googling with these keywords:
Dermal denticles: also called placoid scales, theyre the most primitive form of fish scales that are structurally similar to teeth and are today found only in sharks, rays, and chimaeras.
Outside-in theory: The strongest theory for the evolution of teeth, which are thought to have evolved from dermal denticle scales.
Ostracoderms: Extinct armored jawless fish that lived in the Paleozoic Era
Thelodonts: Extinct jawless fish that had individual scales as opposed to plates of armor
Placoderms: Now extinct, they were some of the first jawed fish and lived from the Silurian through the Devonian era.
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If you like what we do, you can help us!:
- Become our patron: https://patreon.com/MinuteEarth
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CREDITS
*********
Julin Gustavo Gmez (@thejuliangomez) | Script Writer, Narrator and Director
Kate Yoshida | Co-Director
Arcadi Garcia i Rius (@garirius) | Illustration, Video Editing and Animation
Nathaniel Schroeder | Music
MinuteEarth is produced by Neptune Studios LLC
https://neptunestudios.info
OUR STAFF
************
Sarah Berman Arcadi Garcia i Rius
David Goldenberg Julin Gustavo Gmez
Melissa Hayes Alex Reich Henry Reich Peter Reich
Ever Salazar Leonardo Souza Kate Yoshida
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Youtube | https://youtube.com/MinuteEarth
TikTok | https://tiktok.com/@minuteearth
Twitter | https://twitter.com/MinuteEarth
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Website | https://minuteearth.com
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REFERENCES
**************
Donoghue, Philip CJ, and Martin Rcklin. "The ins and outs of the evolutionary origin of teeth." Evolution & development 18.1 (2016): 19-30. https://onlinelibrary.wiley.com/doi/pdf/10.1111/ede.12099
Fraser, Gareth J., et al. "The odontode explosion: the origin of toothlike structures in vertebrates." Bioessays 32.9 (2010): 808-817. https://authors.library.caltech.edu/20188/3/nihms266189.pdf
Huysseune, Ann, JeanYves Sire, and P. Eckhard Witten. "Evolutionary and developmental origins of the vertebrate dentition." Journal of Anatomy 214.4 (2009): 465-476. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2736119/
Pennisi, Elizabeth. "Eating Was Tough For Early Tetrapods." (2013): 390-391. https://science.sciencemag.org/content/339/6118/390.full
Sharks wouldnt be known for their fierce teeth today if it werent for their ancient scales.
LEARN MORE
**************
To learn more about this topic, start your googling with these keywords:
Dermal denticles: also called placoid scales, theyre the most primitive form of fish scales that are structurally similar to teeth and are today found only in sharks, rays, and chimaeras.
Outside-in theory: The strongest theory for the evolution of teeth, which are thought to have evolved from dermal denticle scales.
Ostracoderms: Extinct armored jawless fish that lived in the Paleozoic Era
Thelodonts: Extinct jawless fish that had individual scales as opposed to plates of armor
Placoderms: Now extinct, they were some of the first jawed fish and lived from the Silurian through the Devonian era.
SUPPORT MINUTEEARTH
**************************
If you like what we do, you can help us!:
- Become our patron: https://patreon.com/MinuteEarth
- Share this video with your friends and family
- Leave us a comment (we read them!)
CREDITS
*********
Julin Gustavo Gmez (@thejuliangomez) | Script Writer, Narrator and Director
Kate Yoshida | Co-Director
Arcadi Garcia i Rius (@garirius) | Illustration, Video Editing and Animation
Nathaniel Schroeder | Music
MinuteEarth is produced by Neptune Studios LLC
https://neptunestudios.info
OUR STAFF
************
Sarah Berman Arcadi Garcia i Rius
David Goldenberg Julin Gustavo Gmez
Melissa Hayes Alex Reich Henry Reich Peter Reich
Ever Salazar Leonardo Souza Kate Yoshida
OUR LINKS
************
Youtube | https://youtube.com/MinuteEarth
TikTok | https://tiktok.com/@minuteearth
Twitter | https://twitter.com/MinuteEarth
Instagram | https://instagram.com/minute_earth
Facebook | https://facebook.com/Minuteearth
Website | https://minuteearth.com
Apple Podcasts| https://podcasts.apple.com/us/podcast/minuteearth/id649211176
REFERENCES
**************
Donoghue, Philip CJ, and Martin Rcklin. "The ins and outs of the evolutionary origin of teeth." Evolution & development 18.1 (2016): 19-30. https://onlinelibrary.wiley.com/doi/pdf/10.1111/ede.12099
Fraser, Gareth J., et al. "The odontode explosion: the origin of toothlike structures in vertebrates." Bioessays 32.9 (2010): 808-817. https://authors.library.caltech.edu/20188/3/nihms266189.pdf
Huysseune, Ann, JeanYves Sire, and P. Eckhard Witten. "Evolutionary and developmental origins of the vertebrate dentition." Journal of Anatomy 214.4 (2009): 465-476. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2736119/
Pennisi, Elizabeth. "Eating Was Tough For Early Tetrapods." (2013): 390-391. https://science.sciencemag.org/content/339/6118/390.full
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