Limax flavus (syn. Limacus flavus), known commonly as the yellow slug or tawny garden slug, is a medium to large species of air-breathing land slug, a terrestrial pulmonate gastropod mollusk in the family Limacidae.
L. flavus is a synanthropic slug that was probably native to the Mediterranean region and has been introduced worldwide.
External: Yellowish to orange-pink body, with gray-green mottling; light blue-gray tentacles; short keel; yellow-white sole; yellow body mucus, clear sole mucus (Herbert 1997; Kerney & Cameron 1979).
Internal: 9 x 6 mm internal shell; long, twisting penis 1/6 body length; vas deferens attaches next to penial retractor; a crinkled fold down entire internal length of penis; oviduct widens at junction with atrium; spermatheca connects to oviduct; long rectal caecum (Quick 1960; Wiktor et al. 2000).
Similar to Limacus pseudoflavus but L. pseudoflavus is grayer and has darker markings, coarser tubercles, gray tentacles (Kerney & Cameron 1979). Resembles Limacus maculatus but lighter in color and spermatheca does not connect to penis (Wiktor et al. 2000).
Eggs: 6 x 4 mm, light amber, lemon-shaped (Quick 1960).
Juveniles: 10-13 mm long, light green-yellow with blue tentacles at hatching; yellow spots appear later (Quick 1960).
75-100 mm long extended (Herbert 1997).
Regularly returns, or "homes," to shelter (Cook 1979). Active at night (Quick 1960).
Establishment | introduced |
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Slug or snail | slug |