A recent study delves into the ancient reefs built by archaeocyathids in Nevada 514 million years ago, revealing that these early structures did not contribute to biodiversity in the same way as modern coral reefs. Modern coral reefs are known for their rich marine life and support of the ecosystem. The study also examined 'small shelly fauna,' some of the earliest animals with hard shells on Earth, shedding light on early ocean life and challenging assumptions about reef ecosystems.

The research team found that ancient reefs did not exhibit a consistent pattern and were heavily influenced by localized conditions. This discovery offers a unique perspective on the evolution of modern marine systems, highlighting the variability in reef structures and their impact on ecosystems.

By analysing fossil assemblages from various rock formations, the team identified a low-diversity but high-abundance community, with certain organisms dominating specific layers. The distribution of these organisms may have been shaped by ancient ocean currents, emphasizing the role of hydrodynamics in early marine ecosystems.