Scientists have mapped out 15 different types of ancient insect poop to reveal the hidden engine of prehistoric forests.
April 16, 2026
Original Paper
Detrital Processing in Pennsylvanian Peat Forests: A Systematic Framework for Arthropod Coprolite Morphotypes
SSRN · 6582153
The Takeaway
We usually think of fossil hunting as looking for bones, but this study uses ancient excrement to map out the "invisible" digestive labor that powered forests 300 million years ago. By classifying 15 different types of fossilized bug poop, researchers revealed a complex ecosystem of tiny cleaners that recycled nutrients to keep the world's first massive swamps alive. It shows that the history of life isn't just about who ate who, but how their waste fueled the entire planet. It's a fascinating look at the "dirty work" of evolution that we've ignored for centuries.
From the abstract
Detritivory likely played an important role in Pennsylvanian peat-swamp ecosystems, yet direct evidence of the arthropods responsible for litter fragmentation and nutrient recycling remains scarce due to the rarity of preserved body fossils. Coal balls, carbonate permineralizations of peat, preserve abundant arthropod coprolites that provide a direct record of detrital processing on the Pennsylvanian forest floor. This study establishes the first systematic framework for identifying and interpre