Subscribe To Print Edition About The Tribune Code Of Ethics Download App Advertise with us Classifieds
search-icon-img
  • ftr-facebook
  • ftr-instagram
  • ftr-instagram
search-icon-img
Advertisement

This ancient tadpole fossil is the oldest ever discovered   

The new fossil, found in Argentina, surpasses the previous ancient record holder by about 20 million years
  • fb
  • twitter
  • whatsapp
  • whatsapp
featured-img featured-img
A fossil of the world's oldest tadpole, which coexisted with dinosaurs in the Middle Jurassic about 165 million years ago, is pictured next to a 3D-printed representation of the tadpole and of a fully developed frog, in Buenos Aires, Argentina, on October 28, 2024. Reuters
Advertisement

Scientists have discovered the oldest-known fossil of a giant tadpole that wriggled around over 160 million years ago.

The new fossil, found in Argentina, surpasses the previous ancient record holder by about 20 million years.

Imprinted in a slab of sandstone are parts of the tadpole’s skull and backbone, along with impressions of its eyes and nerves.

Advertisement

“It’s not only the oldest tadpole known, but also the most exquisitely preserved,” said study author Mariana Chuliver, a biologist at Buenos Aires’ Maimonides University.

The results were published Wednesday in the journal Nature.

Advertisement

Researchers know frogs were hopping around as far back as 217 million years ago. But exactly how and when they evolved to begin as tadpoles remains unclear.

This new discovery adds some clarity to that timeline. At about a half foot (16 centimeters) long, the tadpole is a younger version of an extinct giant frog.

“It’s starting to help narrow the timeframe in which a frog becomes a frog,” said Ben Kligman, a paleontologist at the Smithsonian National Museum of Natural History who was not involved with the research.

The fossil is strikingly similar to the tadpoles of today — even containing remnants of a gill scaffold system that modern-day tadpoles use to sift food particles from water.

That means the amphibians’ survival strategy has stayed tried and true for millions of years, helping them outlast several mass extinctions, Kligman said.

Advertisement
Advertisement
Advertisement
Advertisement
tlbr_img1 Home tlbr_img2 Opinion tlbr_img3 Classifieds tlbr_img4 Videos tlbr_img5 E-Paper