Arion timidus
Arion timidus, is a large terrestrial gastropod mollusk in the family Arionidae, the round back slugs.
Description
The animal is dusky-blackish; the margin is yellowish and radiated, and it is divided into two parts by a chestnut line.The mantle is small and worm-like ; the body is cylindrical, is obtusely conoidal posteriorly, and is roughly sulcate.
The head and the tentacles are short and are often semi-retracted; the branchial cavity is anterior.
The is greenish from dusky, the margin is iron-colored, and the head and the tentacles are black.
The holotype is characterized by having a very short epiphallus and vas deferens alongside a long and slender bursal duct.