just below domain. Kingdoms are divided into smaller groups called phyla. Traditionally, some textbooks from the United States and Canada used a system of six kingdoms (Animalia, Plantae, Fungi, Protista, Archaea/Archaebacteria, and Bacteria/Eubacteria) while textbooks in Great Britain, India...
Author notes Laura Eme Present address: Department of Cell and Molecular Biology, Science for Life Laboratory, Uppsala University, Uppsala, Sweden These authors contributed equally: Gordon Lax, Yana Eglit, Laura Eme Authors and Affiliations Department of Biology, Centre for Comparative Genomics and Evo...