Iberian Threeband Slug Ambigolimax valentianus

Class Gastropoda (Slugs & snails)
Order Pulmonata (Lung-bearing slugs & snails)
Family Limacidae (Keelback slugs)
Species Ambigolimax valentianus (A. Férussac, 1822)

Length 50-80 mm.

Also called the ‘Spanish Slug’, ‘Valencia Slug’, ‘Greenhouse Slug’ or the ‘Threeband Garden Slug’, it is a medium-sized slug with a short, inconspicuous keel. The body colour can be of varying shades, but it usually has a pinkish tinge. The body has distinct but thin and dark mantle bands. The sole is pale, and the mucus colourless. Potentially an emerging pest in horticulture.

Found around buildings, in gardens and allotments. Often found in compost bins or under plant pots.

A native of Iberia (descibed from Valencia, eastern Spain), the earliest British and Irish records are from glasshouses in 1936 in Swansea, and Belfast in 1948. Established outdoors in 1981 where its has spread explosively since. Under recorded, but widespread across southern and western Britain and Ireland. Localised further north.

Found in back garden, South Staffordshire 20th August 2020 & 13th September 2021. © Peter Hillman.

Species identification confirmed and recorded by an expert from iRecord.