摘要:This atlas aims to provide an overview of the picocyanobacteria cultures hold by the CNR-IRSA collection. These are monoclonal strains mostly of the genera Synechococcus and Cyanobium. These strains were mainly isolated from lakes of different trophic status around the globe and, so far, they are in other collections of algae and (pico)cyanobacteria. Here we summarise the main characteristics of these strains, including some previously published data, and offer most of the strains as material available for research to every scientists upon request.