Mushrooms may have been Earth's most important early life partners
In short: We often view mushrooms as secondary to plants, but new evidence suggests they were essential architects of the terrestrial world. By colonizing land surfaces hundreds of millions of years earlier than previously thought, these fungi may have paved the way for the very first plants to take root.
For decades, the fossil record of fungi was considered extremely scanty due to their delicate nature. The oldest non-controversial fungal fossils were dated to roughly 400 million years ago. However, a recent study led by Steeve Bonneville at the Université libre de Bruxelles has identified a new fossil in shale from the Democratic Republic of the Congo. This fossil dates back between 715 and 810 million years ago, pushing the known history of mushrooms back by about 300 million years.
The identification relies on molecular composition rather than just shape. While many microorganisms can create similar filaments, the researchers detected vestiges of chitin—a tough compound unique to fungal cell walls. This discovery is significant because it places fungi in a transitional environment between water and land. This suggests that microscopic mushrooms were likely important partners for the first plants that began to colonize the continental surface around 500 million years ago.
As a monophyletic clade, every contemporary fungus originated from one common forebear that diverged from the animal kingdom over 1 billion years ago. Despite their ancient lineage, only about 2 percent of species have been identified, with estimates suggesting there could be as many as 3.8 million species. They perform the unglamorous but vital work of cycling nutrients and breaking down detritus, creating the biological infrastructure that allows complex life to persist.
This research challenges the timeline of land evolution. By proving fungi were present during the Neoproterozoic era, scientists are rewriting the story of how the land surface evolved. It suggests that the symbiotic relationship between fungi and plants is not a relatively recent development, but a fundamental mechanism that has shaped the planet's biosphere for hundreds of millions of years.
Opens the Intellect+ feed with this card first. Swipe up for the next one.
Sources
- Summary by Intellect · source: Evidence That Mushrooms Were The First and Most Important Life on Earth
- Also: First mushrooms appeared earlier than previously thought
- Also: World’s oldest fungi, found in fossils, may rewrite Earth’s history
To cite this card, link to https://intellectplus.co.uk/app/space-evidence-that-mushrooms-were-the-first-and-most-important-li.
How we source, check and correct cards: Editorial standards.
General information, not professional advice. Spotted an error? Flag the card or see corrections and complaints.
Intellect Plus is a visual educational discovery platform for exploring fascinating facts and ideas. Brain Food, Not Brain Rot. What is Intellect Plus?
Related
More in Space · Latest · A–Z · All topics
