The relationship between EICAT and Red List assessments for interactions between alien gastropods and native species that were recorded as impacted (n = 102). In order of increasing impact, the EICAT categories are: Minimal Concern (MC), Minor (MN), Moderate (MO), Major (MR), and Massive (MV). In order of increasing extinction risk, the Red List categories are: Least Concern (LC), Near Threatened (NT), Vulnerable (VU), Endangered (EN), Critically Endangered (CR), and Extinct (EX). Extinct in the Wild is included in the EX category. Points are jittered to avoid overplotting. Margin bars indicate the numbers of interactions per Red List and EICAT category. The EICAT scores are based on the study by Kesner and Kumschick (2018), who assessed the global impacts of 34 gastropod species present as alien to South Africa.