Separate origin of teeth first described in 2003
The LRT recovered several origins for jaws and teeth
when fish were added. That meany ‘goodbye, Gnathostomata’, the traditional clade of jawed vertebrates.
An earlier paper recovered a similar separate origin for dentary teeth.
Smith and Johanson 2003 noted the emergence of dentary teeth in certain derived placoderms apart from other fish clades. Their paper preceded the large reptile tree and pterosaurheresies, but has not encouraged paleontologists to change their cladograms or textbooks over the last 23 years.
That happens too often in paleontology, the one science that takes a long time to embrace discoveries.
This tooth topic was first covered here
https://pterosaurheresies.wordpress.com/2023/12/09/a-placoderm-with-dentary-teeth/
in 2023 when the LRT was still accumulating placoderm taxa.
References
Smith MM and Johanson Z 2003. Separate evolutionary origins of teeth from evidence in fossil jawed vertebrates. Science 299(5620):1235–1236.
Source: https://pterosaurheresies.wordpress.com/2026/03/12/separate-origin-of-teeth-first-described-in-2003/
Anyone can join.
Anyone can contribute.
Anyone can become informed about their world.
"United We Stand" Click Here To Create Your Personal Citizen Journalist Account Today, Be Sure To Invite Your Friends.
Before It’s News® is a community of individuals who report on what’s going on around them, from all around the world. Anyone can join. Anyone can contribute. Anyone can become informed about their world. "United We Stand" Click Here To Create Your Personal Citizen Journalist Account Today, Be Sure To Invite Your Friends.
LION'S MANE PRODUCT
Try Our Lion’s Mane WHOLE MIND Nootropic Blend 60 Capsules
Mushrooms are having a moment. One fabulous fungus in particular, lion’s mane, may help improve memory, depression and anxiety symptoms. They are also an excellent source of nutrients that show promise as a therapy for dementia, and other neurodegenerative diseases. If you’re living with anxiety or depression, you may be curious about all the therapy options out there — including the natural ones.Our Lion’s Mane WHOLE MIND Nootropic Blend has been formulated to utilize the potency of Lion’s mane but also include the benefits of four other Highly Beneficial Mushrooms. Synergistically, they work together to Build your health through improving cognitive function and immunity regardless of your age. Our Nootropic not only improves your Cognitive Function and Activates your Immune System, but it benefits growth of Essential Gut Flora, further enhancing your Vitality.
Our Formula includes: Lion’s Mane Mushrooms which Increase Brain Power through nerve growth, lessen anxiety, reduce depression, and improve concentration. Its an excellent adaptogen, promotes sleep and improves immunity. Shiitake Mushrooms which Fight cancer cells and infectious disease, boost the immune system, promotes brain function, and serves as a source of B vitamins. Maitake Mushrooms which regulate blood sugar levels of diabetics, reduce hypertension and boosts the immune system. Reishi Mushrooms which Fight inflammation, liver disease, fatigue, tumor growth and cancer. They Improve skin disorders and soothes digestive problems, stomach ulcers and leaky gut syndrome. Chaga Mushrooms which have anti-aging effects, boost immune function, improve stamina and athletic performance, even act as a natural aphrodisiac, fighting diabetes and improving liver function. Try Our Lion’s Mane WHOLE MIND Nootropic Blend 60 Capsules Today. Be 100% Satisfied or Receive a Full Money Back Guarantee. Order Yours Today by Following This Link.
| Visits: | 1,786,173,789 |
| Stories: | 8,601,399 |
Whistler Blowers, Insiders
