Data were collected by Jonathan Payne, John Groves, Thienan Nguyen, and Adam Jost. Questions should be directed to Jonathan Payne (jlpayne@stanford.edu). payne_database_S1.txt - tab delimited text file containing sizes of North American fusulinoidean foraminifera payne_database_S2.txt - tab delimited text file containing sizes of global fusulinoidean foraminifera compiled from the Ellis & Messina catalogue payne_database_S3.txt - tab delimited text file containing sizes of modern foraminifera from the Sahul Shelf payne_database_S4.txt - tab delimited text file containing sizes of early Holocene foraminifera from the Santa Barbara Basin payne_database_S1.txt data fields: Species - genus and species name Radius_1_mm - First axis radius in mm Radius_2_mm - Second axis radius in mm Radius_3_mm - Third axis radius in mm Logvol_mm3 - Base 10 logarithm of test volume in mm^3 VSA_mm - Ratio of volume to surface area in mm Radiometric_Mya - Age of the species in millions of years pO2_percent - Atmospheric pO2 associated with the radiometric age payne_database_S2.txt data fields: Genus - genus name Species - species name Radius_1_mm - First axis radius in mm Radius_2_mm - Second axis radius in mm Radius_3_mm - Third axis radius in mm Logvol_mm3 - Base 10 logarithm of test volume in mm^3 VSA_mm - Ratio of volume to surface area in mm Radiometric_Mya - Age of the species in millions of years pO2_percent - Atmospheric pO2 associated with the radiometric age payne_database_S3.txt data fields: Genus - genus name Species - species name Sample - sample number from which specimen was obtained VSA_mm - Ratio of volume to surface area in mm Logvol_mm3 - Base 10 logarithm of test volume in mm^3 O2_concentration_mLperL - oxygen concentration in milliliters per liter pO2_percent - Atmospheric pO2 equivalent, assuming equilibrium with seawater at 25 degrees Celsius water_depth_m - water depth from which specimen was sampled, in meters payne_database_S4.txt data fields: Core - Name of the core from which the sample was taken Age - Age of the sample in thousands of years Genus - genus name Species - species name, where known Radius_1_mm - First axis radius in mm Radius_2_mm - Second axis radius in mm Radius_3_mm - Third axis radius in mm VSA_mm - Ratio of volume to surface area in mm Logvol_mm3 - Base 10 logarithm of test volume in mm^3 pO2_percent - Atmospheric pO2 equivalent, assuming equilibrium with seawater at 25 degrees Celsius