Global patterns are key to understanding macroevolution.

Global analyses better recover shared biological signals and are less sensitive to sampling biases than regional diversification rates in marine invertebrates.

• Why it matters: Understanding macroevolution requires accurate estimates of diversification patterns, but regional data are influenced by multiple biological processes and sampling biases, complicating interpretation.
• What they did: The study used fossil occurrences of marine invertebrates to compare regional and global diversification rates, focusing on the effects of immigration, extirpation, preservation, and sampling biases.
• The result: Global analyses integrate data across regions and environments, dampen biases, and recover more shared biological signals, emphasizing their importance for studying macroevolution over deep time.