Limax gerhardti Niethammer, 1937
Copulation from June to October, usually in the evening. First, the partners look carefully for a place where their penes can hang down at least 50 cm. It takes 3-4 hours from the beginning to sperma transmission. Penis length varies between 15 and 50 cm. Afterwards, the partners need another 2-8 hours to get their penes cleaned (by dropping the slime) and to separate. Animals copulate repeatedly in the season. Activity and copulation is not much temperature dependent, can also take place at 10-12°C.
External: Slug evenly black; very finely corrugated; posterior part shortly keeled; posterior end of the mantle smoothly angulated, not pointed; sole light reddish, with darker reddish margins; margin of the foot black; mucus not sticky, colourless.
Penis very long, vas deferens and retractor inserting at the distal end of the penis.
Differs from L. cinereoniger in its longer penis, a more finely corrugated surface and a shorter keel, and the black margin of the sole being narrower and less clearly delimited against the light central zone of the sole. L. punctulatus has a more uniformly coloured sole.
Size: 130-150 mm long.
Italy (Ischia).
Type Locality: Italy: Ischia island.