Mille C. auteur aut IRD Rigault Frédéric auteur aut IRD Cazères S. auteur aut IRD Jourdan Hervé auteur aut IRD text journalArticle eng text/pdf reformatted digital access We report the recent arrival and subsequent spread of the Sida Leafbeetle, Calligrapha pantherina Stal, 1859, in the archipelago of New Caledonia. The species seems to have a rapid spread as it is now recorded all along the west coast and also have spread to the Loyalty Islands. The first specimen was caught in November 2012. This is a biocontrol agent which was introduced in the Pacific Region against invasive Malvaceae (Sida spp.). This accidental arrival would help to control the alien weed, Sida acuta Burm. f., in New Caledonia. But this establishment raises some questions about potential threats on the two endemic New Caledonian Sida species. We also discuss this arrival and subsequent installation in the context of global change and biosecurity issues, particularly in such a biodiversity hotspot. specialized ILE INVASION INSECTE ESPECE ALLOGENE INTRODUCTION D'ESPECES LUTTE ANTIADVENTICE CONSEQUENCE ECOLOGIQUE SURVEILLANCE INVASION BIOLOGIQUE BIODIVERSITE IMPACT SUR L'ENVIRONNEMENT BIOSECURITE NOUVELLE CALEDONIE 080ZOOGEN01 082FAUNE01 12 1 1837 [5 ] 2016 1809-127X https://www.documentation.ird.fr/hor/fdi:010069012 1809-127X [F B010069012] https://www.documentation.ird.fr/hor/fdi:010069012 https://horizon.documentation.ird.fr/exl-doc/pleins_textes/divers17-03/010069012.pdf IRD - Base Horizon / Pleins textes 2017-03-03 2022-03-13 fdi:010069012 fre