Distribution of selected traits across the >4,000 strains in the most recent version of the database, including cell shape (A), spore formation (B), motility (C), oxygen requirements (D), temperature optimum (E), and pH optimum (F). Distribution of selected traits across the >4,000 strains in the most recent version of the database, including cell shape (A), spore formation (B), motility (C), oxygen requirements (D), temperature optimum (E), and pH optimum (F). The number of strains with information for a particular trait is indicated in parentheses. Albert Barberán et al. mSphere 2017; doi:10.1128/mSphere.00237-17