The geographical distribution (baseline) of the 37 Invasive Alien Species (IAS) of Union concern listed by Commission Implementing Regulation (EU) 2016/1141, under the frame of Regulation (EU) 2014/1143, was published in 2017 as a JRC science-for-policy report. It includes validated country level occurrences by 18 EU Member States (MS) Competent Authorities and validated grid level occurrences by 13 MS Competent Authorities. Since then, three additional MS Competent Authorities (Bulgaria, Italy, and Luxemburg) provided validated data. Furthermore, two MS Competent Authorities (Finland, Cyprus) supplemented their data provided in the baseline. The current report includes the additional information provided by the aforementioned MS Competent Authorities. This information updates the information associated to the corresponding species and MS of the baseline of the first 37 IAS of Union concern. This updated spatial information informs the implementation of Art. 16 of the EU Regulation 1143/2014, dictating the mandatory notification of early detections of listed species to the European Commission and to the other MS.JRC.D.2-Water and Marine Resource
