Arion hortensis, common name the "garden slug", "small striped slug" or "black field slug" is a species of small air-breathing land slug, a terrestrial pulmonate gastropod mollusk in the family Arionidae, the roundback slugs.
External: Contracted body semicircular in cross-section; dark gray, bluish gray, dark brown or black body, with yellow-brown dots; dark longitudinal line with fuzzy lower edge on each side; sides paler than dorsum; black head and tentacles; fine wrinkles on dorsum; yellow to orange sole; yellow-orange body mucus (Quick 1960; Kerney & Cameron 1979; Wiktor 1983; Herbert 2010).
Internal: Dark ovotestes, yellow-white hermaphrodite duct, light pink-brown spermoviduct, yellow lower atrium with outer glandular layer; long, thin oviduct widens at base; rounded spermatheca with a short, thick duct with a widened base; spermatophore 5-6.5 mm long, variable in shape, and with a hook on its posterior end (Quick 1960).
Eggs: 2.5 x 2 mm, opaque yellow, sticky clusters to 30 eggs (Quick 1960).
Juveniles: 4-5 mm long at hatching, with darker dorsum and mantle than adults (Quick 1960); blue-black body and yellow sole (Wiktor 1983).
25-30 mm long extended (Herbert 2010).
This slug lives in gardens, fields, pastures and similar habitat.
occurs (regularly, as a native taxon) in multiple nations
Establishment | introduced |
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Slug or snail | slug |