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. 2023 Sep 1;3:1233281. doi: 10.3389/fbinf.2023.1233281

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Copyright © 2023 Craig, Kumar and Hedges.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Phylogenetic hypothesis for the origin of eukaryotes. The last universal common ancestor (LUCA) diverged into Archaea and Bacteria. Subsequently the first eukaryotic common ancestor (FECA) formed by the endosymbiosis of the last archaeal and last bacterial common ancestors of eukaryotes (LACA-K and LBCA-K, respectively.