A well-preserved microbial assemblage has been found in Paleoproterozoic cherty stromatolites from the 2000 Ma old Franceville Group, Gabon. This assemblage contains coccoids and star-like forms, filaments and budding tubular forms. These various forms are mostly of cyanobacterial affinity, and among them nostocalean akinetes (Archaeoellipsoides) are reported, for the first time, from rocks older than the Mesoproterozoic.The most noteworthy discovery in the Franceville biota is the Gunflint-type association Huroniospora-Gunflintia-Eoastrion-Archaeorestis, known also -- without Archaeorestis -- in other Paleoproterozoic assemblages throughout the world.The present assemblage comprises 13 taxa consisting of 8 species belonging to 10 genera and 2 unnamed forms. It is dominated by Gunflintia filaments, regarded as a mat-building community and by Huroniospora coccoids, probably mat-dwellers and/or plankters. The rare and large forms such as akinetes of Archaeoellipsoides were allochthonous and presumably planktonic.