Abstract
"The Planet Reviewed in Corsica" is an expedition by the MNHN in partnership with the Collectivité de Corse and the French Office for Biodiversity. Between 2019 and 2022, several teams of scientists are undertaking an inventory of terrestrial and marine diversity of Corsica. The objective is to establish a reference state of a series of sites of high biological value and to modernize the collections of the MNHN. This report provides a quick overview of terrestrial expeditions from two emblematic sectors of Corsica: the west coast and northern Capicorsu. From March to May 2021, 34 participants took part of the inventory of about 10 sites. In 2021, the increased sampling effort and the first phase of identification made it possible to announce 2 227 inventoried species and 11 346 data uploaded and shared in the national inventory of natural heritage (INPN). This last field year makes an important contribution to the national inventory of natural heritage with 75 species inventoried for the first time in Corsica, 5 new species for France and 12 species expected new to science. Many taxa had not been observed for decades or several for more than a century. This knowledge is being disseminated on OpenObs, the French portal for biodiversity. Moreover, the Barcoding campaign achieved a total of 2 200 specimens sequenced for DNA (CO1 et ITS). The results will contribute to the species identifications, the taxonomic revisions to be published but also to enrich the global Barcode of Life information system.