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Long-accepted theory of vertebrate origin upended by fossilized lamprey larvae


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IMAGE: Artist s reconstruction showing the life stages of the fossil lamprey Priscomyzon riniensis. It lived around 360 million years ago in a coastal lagoon in what is now South Africa. Clockwise.
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Credit: Kristen Tietjen
Ottawa, March 10, 2021 - A new study of fossilized lampreys dating from more than 300 million years ago is challenging a long-held theory about the evolutionary origin of vertebrates (all animals with a backbone). The findings are published March 10 in the science journal
Nature.
Lampreys are ancient, jawless, eel-like fishes that arose around half a billion years ago and they have long provided insights into vertebrate evolution. Now, scientists with the Canadian Museum of Nature, the University of Chicago and the Albany Museum in South Africa are reporting their analysis of dozens of tiny fossils that track the life stages and growth of ancient lampreys, from hatchlings to juveniles to adults. ....

South Africa , United States , Dan Smythe , Kristen Tietjen , Tetsuto Miyashita , Kristen Tietjin , Michael Coates , University Of Kansas , University Of Chicago , Canadian Museum Of Nature , Albany Museum , Canadian Museum , Rob Gess , Plate Devonian , Media Relations , Developmental Reproductive Biology , ஒன்றுபட்டது மாநிலங்களில் , டான் ஸ்மைத் , கிறிஸ்டன் திீெட்ஜேன் , மைக்கேல் பூச்சுகள் , பல்கலைக்கழகம் ஆஃப் கன்சாஸ் , பல்கலைக்கழகம் ஆஃப் சிகாகோ , கனடியன் அருங்காட்சியகம் ஆஃப் இயற்கை , அல்பானி அருங்காட்சியகம் , கனடியன் அருங்காட்சியகம் , கொள்ளை கெஸ் ,