David M. Kroeck,^*,** Mats E. Eriksson,^*** Anders Lindskoghttps://orcid.org/0000-0001-7281-6840,^**** Axel Munneckehttps://orcid.org/0000-0002-6898-1082,^***** Michel Dubois,^1,****** Sylvie Régnier,^******* Thomas Servaishttps://orcid.org/0000-0002-4089-7874<sup>********

1</sup>Univ. Lille, LGCcE, Villeneuve d'Ascq, France

^*CONTACT David M. Kroeck dmkroeck@gmx.de Univ. Lille, CNRS, UMR 8198 - Evo-Eco-Paleo, Lille, France.
^**DAVID M. KROECK obtained his MSc in Earth Sciences from the Steinmann-Institut (now called Institut für Geowissenschaften) of the University Bonn, Germany in 2016 and completed his Ph.D in the Evo-Eco-Paléo unit of the University of Lille, France in 2019, working on the biodiversity, palaeogeography, palaeoecology and biostratigraphy of the microphytoplankton of the Palaeozoic.
^***MATS E. ERIKSSON is a professor of paleontology at the Department of Geology, Lund University, Sweden. His research is focused primarily on virtual and molecular paleontology, and early Paleozoic ecosystems, biostratigraphy, and event stratigraphy.
^****ANDERS LINDSKOG is a researcher at the Department of Geology, Lund University, Sweden. His research is mainly focused on lower Palaeozoic carbonate environments, e.g. geochemistry, paleoecology, sedimentology and stratigraphy. Lindskog collects and digitizes old geoscience-related literature, which is made publicly available on his web-page PaleoArchive (www.paleoarchive.com).
^*****AXEL MUNNECKE is a professor for paleontology at the University of Erlangen (Germany). He obtained his PhD in 1997 at the university in Kiel. His research focuses on carbonate microfacies and diagenesis as well as on Palaeozoic calcareous and organic-walled microfossils and palaeoclimate reconstructions.
^******MICHEL DUBOIS is a Professor at the University of Lille (France) and a member of the Laboratory of Civil Engineering and geo-Environment (LGCgE). He passed his Ph.D thesis at the National Polytechnic Institute of Lorraine (Nancy, France) in 1992 in geochemistry and natural resources. After postdoctoral positions at Nancy and at the National Autonomous University of Mexico (UNAM), he was recruited in 1995 at Lille as a mineralogist and a geochemist, specialist of fluid inclusions (small cavities inside minerals). His research field includes fluid thermodynamics of saline solutions, metamorphism, mining exploration, petroleum reservoirs and environmental-geotechnical problematics dealing with urban underground cavities.
^*******SYLVIE RÉGNIER graduated as a biotechnology technician and started working in the University Hospital Calmette at Lille (France) in the hematology lab (specialising in chemoresistance in Acute Myeloid Leukemia), before joining a private laboratory of soil, water and air analyses. She arrived in the Earth Science Department of the University of Lille in 2006. After training in the palynology laboratories of Lille and Liège (Belgium), she now specialises in palynomorph and microfossil extraction techniques, and currently works on optimising the methods of palynomorph extraction (improving time and quality). She is also responsible for the SEM platform of the palaeontology research team of the Evo-Eco-Paléo CNRS research unit that she integrated in 2017.
^********THOMAS SERVAIS is a Research Director at the French Centre of Scientific Research (CNRS). His research is focused on the biostratigraphy, palaeobiogeography and palaeoecology of Palaeozoic acritarchs. His current research is mostly dedicated to a better understanding of the Ordovician Plankton Revolution. He is currently leader of the IGCP project 653 (The Onset of the Great Ordovician Biodiversification Event) and Chairman of the Ordovician Subcommission of Stratigraphy.