HelicoprionFor over 100 years, the spiral tooth fossils of Helicoprion have baffled everyone who tri
HelicoprionFor over 100 years, the spiral tooth fossils of Helicoprion have baffled everyone who tried to figure them out, and more theories were proposed than you can believe (see top of picture). In the last year, some CT scans done by Leif Tapanila at Idaho State and coauthors have finally nailed down the location of the tooth-whirl: in the throat! The best idea of its purpose is ratcheting its catch down the throat. You can see the current, accepted reproduction at the bottom of the picture (by great Paleo-artist Ray Troll).-MrAFossil image source: https://en.wikipedia.org/wiki/Helicoprion#/media/File:Spirale_dentaire_d%27helicoprion.jpg -- source link
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