Arion ater group: Arion rufus Terrestrial Mollusk Tool was specifically designed to assist in the identification of adult terrestrial slugs and snails of agricultural importance. The tool also includes species of quarantine significance as well as invasive and contaminant mollusk species commonly intercepted at U.S. ports of entry. This Lucid-based identification tool is specifically aimed toward federal, state and other agencies or organizations within the U.S. that are concerned with the detection and identification of mollusks of significance. This tool includes 33 families and 128 species, but it is not inclusive of all mollusk pests, as new species of interest arise almost daily.

This site includes an interactive identification key, fact sheets, biological and ecological notes, a dissection tutorial, tips for identifying mollusks, a glossary of commonly used terms, and a list of useful links and references.