Live Feeds
● LIVE Updated 1h ago · 14 sources tracked

Fossil Teeth Reveal Biggest Asian Rodent

Researchers have identified a new species of giant rodent, Yakamys sirindhornae, from two fossilized teeth found in a Krabi Province coal mine in southern Thailand. The animal lived approximately 34 to 35 million years ago during the late Eocene and is estimated to have weighed about 66 pounds (30 kilograms). This makes it the largest known rodent from Asia and predates the evolution of South American giant rodents by tens of millions of years. The discovery shifts the understood timeline and geographic origin of rodent gigantism.

🎙️

Listen to Live Briefing

Real-time synthesized voice briefing · Live Feeds Desk

⏱ ~3 min
Speed:
RSS Source map (14)
⚡ Key Developments & Real-Time Context
Text size:
  • ✓ The new species is named Yakamys sirindhornae.
  • ✓ Fossils consist of one incisor and one molar recovered from a coal mine in Krabi Province, Thailand.
  • ✓ The rodent lived approximately 34 to 35 million years ago during the late Eocene.
  • ✓ Estimated body mass is roughly 66 pounds (30 kilograms).
🛡️ Source Corroboration: 14 independent reporting domains (92% confidence) ⏱ Read time: ~3 min

What changed

A new rodent genus and species, Yakamys sirindhornae, has been formally described based on an incisor and molar recovered from a Thai lignite mine, establishing the earliest known giant rodent in Asia.

Live updates

  1. Fossil Teeth in Thailand Identify 66-Pound Prehistoric Rodent

    Researchers have identified a new species of giant rodent, Yakamys sirindhornae, from two fossilized teeth found in a Krabi Province coal mine in southern Thailand. The animal lived approximately 34 to 35 million years ago during the late Eocene and is estimated to have weighed about 66 pounds (30 kilograms). This makes it the largest known rodent from Asia and predates the evolution of South American giant rodents by tens of millions of years. The discovery shifts the understood timeline and geographic origin of rodent gigantism.

    Why it matters

    Rodent gigantism was previously documented primarily in South America within the last 10 million years, with the capybara as the largest living example. This Southeast Asian fossil pushes the emergence of giant body size back to the Eocene, indicating gigantism evolved independently and much earlier on different continents. The find also highlights the paleobiogeographic significance of the region during a period of major faunal turnover.

    What is confirmed

    • The new species is named Yakamys sirindhornae.
    • Fossils consist of one incisor and one molar recovered from a coal mine in Krabi Province, Thailand.
    • The rodent lived approximately 34 to 35 million years ago during the late Eocene.
    • Estimated body mass is roughly 66 pounds (30 kilograms).
    • It is the largest known rodent fossil discovered in Asia.
    • The discovery indicates rodent gigantism evolved in Asia tens of millions of years before South American giants appeared.

    Still unconfirmed

    • The initial fossil fragment was mistaken for a piece of bone by a Thai geologist before being identified as a tooth.
    • Researchers do not yet know the animal's full appearance, diet, or behavior.

    What to watch next

    • Publication of the formal taxonomic description in a peer-reviewed journal (Nature).
    • Discovery of cranial or post-cranial fossils to reconstruct anatomy and ecology.
    • Comparative analysis with contemporary Eocene faunas from China and Pakistan to clarify dispersal routes.
    Sources used for this update (17)
    1. gizmodo.com — Gizmodo | The Future Is Here
    2. www.newser.com — 93-Year-Old Helps Police Catch Alleged Phone Scammer
    3. www.research.va.gov — VA Research News Briefs
    4. Newser — Fossil Teeth Reveal Biggest Asian Rodent
    5. EurekAlert! — Giant, prehistoric rodent fossils discovered in southern Thailand
    6. Nature — A giant eocene ischyromyid from Southeast Asia reveals the early evolution of rodent gigantism
    7. Phys.org — Prehistoric 'giant rat' found in Thailand from fossil teeth
    8. Science Daily — Scientists discover a giant 66-pound rodent that lived 34 million years ago
    9. www.yahoo.com — Scientists Identify Giant 66-Pound Rodent That Lived 34 Million Years Ago
    10. www.newser.com — Fossil Teeth Reveal Biggest Asian Rodent - Newser
    11. www.sci.news — 35-Million-Year-Old Fossil Teeth from Thailand Reveal Rodent ...
    12. www.earth.com — Two teeth found in a Thai coal mine reveal a giant ancient ...
    confidence 92%
📊

Community Sentiment: How do you assess this situation?

Voice your perspective · Real-time aggregated sentiment from the Live Feeds community