An Akouemma hemisphaeria Organic Macrofossils Colony Hosting Biodiversity Assemblage on the Seafloor of Okondja Basin (Gabon) dated at 2.2 Ga

Edou-Minko A^1*, Moussavou M¹, Sato T^2*, Tchikoundzi C¹, Sawaki Y³, Ndong Ondo S¹, Ortega R⁴, Maire R⁵, Kaestner A⁶, Mbina Mounguengui M¹, Roudeau S⁴, Fleury G⁷, Carmona A⁴, De Parseval PH⁸, Makaya Mvoubou¹, Musavu Moussavou B¹, Ogandaga Agondjo M¹, Sasaki O⁹ and Maruyama S²

¹Université des Sciences et Techniques de Masuku, BP. 901 Franceville, Gabon

²Earth-Life Science Institute (ELSI), Tokyo Institute of Technology, 2-12-1 O-okayama Meguro-ku, Tokyo, Japan

³Department of Earth and Planetary Sciences, Tokyo Institute of Technology, 2-12-1 O-okayama Meguro-ku, Tokyo, Japan

⁴CENBG, Univ. Bordeaux, CNRS, IN2P3, UMR 5797, F-33170 Gradignan, France

⁵UMR 5319 Passages, Maison des Suds, CNRS-Université Bordeaux-Montaigne, France and Honorary Research Fellow, University of the Witwatersrand, Johannesburg, South Africa

⁶Laboratory for Neutron Scattering and Imaging, Paul Scherrer Institut, CH-5232 Villigen - PSI, Switzerland

⁷Muséum d’Histoire Naturelle de Toulouse, 35 Allée Jules Guesde, 3100 Toulouse, France

⁸Géosciences Environnement Toulouse (GET), Observatoire de Midi-Pyrénées Université de Toulouse, CNRS, IRD, 14 Avenue Edouard Belin, F-31400 Toulouse, France

⁹Tohoku University Museum, Université de Tohoku, 6-3 Aoba, Aramaki, Aoba-ku, Sendai, Japan

^*Corresponding Author(s): Edou-Minko A, Université des Sciences et Techniques de Masuku, BP. 901 Franceville, Gabon, Tel: +24107173341 Email: Sato T, Earth-Life Science Institute (ELSI), Tokyo Institute of Technology, 2-12-1 O-okayama Meguro-ku, Tokyo 152-8551, Japan, Tel: +81357342283 Email: