The eLibrary of Microbial Systematics and Genomics (eLMSG) database provides a platform for microbial systematics, genomics and phenomics (polyphasic taxonomy related phenotypes). It includes information in areas such as microbial taxonomy, ecology, morphology, physiology, and molecular biology. It is intended as a reference for research in microbial systematics, comparative genomics, evolutionary biology, and microbiomes.