Sawfish fossils hold clues to origin of teeth
Scientists have debated whether the evolution of teeth occurred outside-in or inside-out. Sawfish fossils may hold the answer.
Source: futurity.org
Wiley Publications News Today : Breaking News, Live Updates & Top Stories | Vimarsana
Stay updated with breaking news from Wiley Publications. Get real-time updates on events, politics, business, and more. Visit us for reliable news and exclusive interviews.
Top News In Wiley Publications Today - Breaking & Trending Today
Sawfish fossils suggest teeth likely evolved from body scales in ancient fishes
Scientists have long debated the origins of teeth. Did they evolve from body scales that migrated into the mouths of ancient vertebrates and became adapted for eating — an idea known as the "outside-in" hypothesis? Or did they evolve independent of scales, originating deep within the oral cavity and ultimately mounting onto the jaws — known as the "inside-out" hypothesis? A new study by scientists at Penn State provides evidence for the "outside-in" hypothesis.
Source: psu.edu
Sawfish fossils suggest teeth likely evolved from body scales in ancient fish
Scientists have long debated the origins of teeth. Did they evolve from body scales that migrated into the mouths of ancient vertebrates and became adapted for eating — an idea known as the "outside-in" hypothesis? Or did they evolve independent of scales, originating deep within the oral cavity and ultimately mounting onto the jaws — known as the "inside-out" hypothesis? A new study by scientists at Penn State provides evidence for the "outside-in" hypothesis.
Source: psu.edu