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Sustainability Times

“Dirt Ants Once Ruled the Caribbean”: 16-Million-Year-Old Amber Discovery Uncovers Shocking Insect Empire Lost to Time

Paleontologists have uncovered a groundbreaking discovery with the first-ever fossilized Basiceros dirt ant found in Caribbean amber, offering new insights into the ancient distribution and evolutionary history of these elusive insects.


Hina DinooBy Hina DinooApril 20, 2025 at 4:59 PM74 Mins Read
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16-Million-Year-Old Amber Shocker: Dirt Ants Once Ruled the Caribbean, Unearthing Hidden Secrets of Ant Kingdoms
An artistic rendition of the extinct Basiceros enana ant, preserved in 16-million-year-old Dominican amber, showcasing its intricate camouflage adaptations.
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IN A NUTSHELL
  • 🦠 Paleontologists discovered the first fossilized Basiceros dirt ant in Caribbean amber, reshaping our understanding of their distribution.
  • 🔍 Advanced imaging techniques revealed that Basiceros enana was smaller than modern relatives, challenging previous evolutionary assumptions.
  • 🌍 The fossil suggests ancient land bridges enabled these ants to migrate from the mainland to the Caribbean, highlighting complex evolutionary history.
  • 📜 The study underscores the importance of fossils in understanding the survival and extinction of species over millions of years.

In an extraordinary discovery, paleontologists have unearthed a 16-million-year-old fossil of a dirt ant trapped in amber from the Dominican Republic. This find marks the very first fossilized Basiceros dirt ant found in the Caribbean, offering a unique glimpse into the evolutionary history of these elusive creatures. The fossil, named Basiceros enana, provides vital clues about the ancient distribution and characteristics of these ants, which were previously thought to inhabit only the neotropical rainforests of Central and South America. This discovery is reshaping our understanding of the past ecosystems and evolutionary pathways of ants.

The Fascinating World of Basiceros Dirt Ants

Basiceros dirt ants are known for their exceptional ability to camouflage themselves with their surroundings, a trait that has earned them their descriptive name. These ants can blend seamlessly with the ground, making them rare finds in the wild. The newly discovered Basiceros enana fossil provides the first direct evidence that this cryptic ant group existed in the Caribbean during the Miocene epoch, which spanned from 23 to 5.3 million years ago. Until this discovery, Basiceros ants were only known to inhabit regions from Costa Rica to Southern Brazil.

This fossil challenges previous assumptions about the geographical distribution of these ants. According to Phil Barden, senior author of the study and associate professor of biology at NJIT, the find suggests that ancient land bridges may have facilitated the movement of these ants from the mainland to the Caribbean islands. This broader distribution highlights the complex evolutionary history of life on Earth, underscoring how fossils can reveal unexpected truths about the past.

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Unlocking the Secrets of the Tiny Fossil

To uncover the secrets held within this tiny fossil, researchers used advanced imaging techniques like Micro-CT scanning and 3D reconstruction. These methods allowed scientists to examine the ant’s physical characteristics in remarkable detail. Measuring just over 0.2 inches, Basiceros enana was notably smaller than its modern relatives, which can grow up to 0.35 inches.

The size difference between the ancient and modern ants challenges previous hypotheses that suggested these ants were ancestrally larger and shrank over time. Instead, this discovery indicates the opposite, illustrating the importance of fossils in understanding the evolution of a lineage. Despite its age, the fossil showed that these ants already had the specialized two-layered hairs that allow modern dirt ants to camouflage effectively with soil and leaf litter, highlighting the longstanding success of this survival strategy.

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The Disappearance of Caribbean Dirt Ants

The ancient Caribbean dirt ants eventually disappeared from the region during the Miocene epoch. Scientists believe that their extinction was likely due to a lack of suitable habitats or increased competition with other species. The presence of Basiceros in Dominican amber supports the idea that ancient land bridges provided pathways for these ants to traverse from the mainland to the Caribbean.

Phil Barden emphasized that this fossil is a piece of a larger puzzle that can help us understand why some groups of organisms go extinct while others persist for millions of years. The findings, published in the journal Proceedings of the Royal Society B, contribute to our knowledge of past ecosystems and the factors that influence the survival and extinction of species over time.

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Implications for Understanding Evolutionary History

This remarkable discovery of the fossilized Basiceros enana offers valuable insights into the evolutionary history of ants and their ancient ecosystems. By studying such fossils, scientists can better understand how environmental changes and geographical barriers have shaped the distribution and characteristics of species over time. This knowledge not only informs our understanding of the past but also helps predict how current and future changes might impact biodiversity.

The study of ancient ant fossils like Basiceros enana is crucial for piecing together the intricate history of life on Earth. As scientists continue to uncover more fossils, they hope to build a more comprehensive picture of how these tiny creatures have adapted and survived through the ages. What other secrets might the fossil record hold about the ancient world and the creatures that once inhabited it?

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Hina Dinoo
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Hina Dinoo is a Toronto-based journalist at Sustainability Times, covering the intersection of science, economics, and environmental change. With a degree from Toronto Metropolitan University’s School of Journalism, she translates complexity into clarity. Her work focuses on how systems — ecological, financial, and social — shape our sustainable future. Contact: [email protected]

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View 7 Comments
7 Comments
  1. Henry on April 20, 2025 5:02 PM

    Wow, 16 million years old? That’s older than my jokes! 😂

    Reply
  2. Janine on April 20, 2025 6:03 PM

    Why did these ants disappear from the Caribbean? Was it climate change back then too?

    Reply
  3. Elisaprism on April 20, 2025 7:07 PM

    Fascinating discovery! Thanks for sharing such intriguing insights.

    Reply
  4. abdulfreedom on April 20, 2025 8:09 PM

    I’m curious, how do they determine the age of the amber so precisely?

    Reply
  5. evelyn on April 20, 2025 9:10 PM

    Isn’t it amazing how tiny creatures can have such a big impact on our understanding of history?

    Reply
  6. Rogerdowel on April 23, 2025 4:53 AM

    An ant is an insect. Insects have six legs. Why does this rendition have seven legs?

    Reply
    • Tendoboy1984 on April 23, 2025 12:08 PM

      It’s AI art

      Reply
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