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Why Sharks Are Covered In Teeth
Manage episode 497661814 series 46737
To learn more about this topic, start your googling with these keywords:
- Dermal denticles: also called placoid scales, they’re 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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567 episodes
Manage episode 497661814 series 46737
To learn more about this topic, start your googling with these keywords:
- Dermal denticles: also called placoid scales, they’re 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.
MinuteEarth is produced by Neptune Studios LLC
https://neptunestudios.info
If you like what we do, you can help us!
- Become our patron: https://patreon.com/MinuteEarth
- Buy our merch: http://dftba.com/minuteearth
- Buy our book: https://minuteearth.com/books
- Sign up to our newsletter: http://news.minuteearth.com
- Share with your friends and family
- Leave us a comment (we read them!)
Learn more about your ad choices. Visit megaphone.fm/adchoices
567 episodes
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