Red slug

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Red slug
Arion rufus (Dourbes).jpg
Conservation status

Apparently Secure (NatureServe)
Scientific classification
Kingdom: Animalia
Phylum: Mollusca
Class: Gastropoda
(unranked): clade Heterobranchia

clade Euthyneura
clade Panpulmonata
clade Eupulmonata
clade Stylommatophora
informal group Sigmurethra

Superfamily: Arionoidea
Family: Arionidae
Genus: Arion
Species: A. rufus
Binomial name
Arion rufus
(Linnaeus, 1758)

The red slug (Arion rufus), also known as the large red slug,[1] chocolate arion[2] and European red slug,[3] is a species of land slug in the family Arionidae, the roundback slugs.

Description[edit]

This slug is distinguished from similar species by the position of its respiratory pore toward the front of its mantle, the lack of a keel on its back, and a wrinkled surface. It varies in color from orange or red to brown or black. The fringe of its foot is red-striped and its tentacles are dark.[3] It is 7 to 14 centimeters long.[1] Its mucus is sticky.[4]

The eggs are about half a centimeter long and are whitish when new, turning yellow-brown.[4]

It is very similar to the black slug, A. ater. The two can only be distinguished with certainty by dissection or molecular analysis.[4] It has been treated as a subspecies of A. ater in the past.[5]

Range[edit]

This species is probably native to northwestern Europe.[4] Its distribution is unclear. It has been widely introduced and it is easily confused with other species.[1]

Ecology[edit]

It is known from wooded areas[4] and dry coastal habitat, and is commonly found in gardens.[1]

Behavior[edit]

Like most other slug species, the red slug elongates while in locomotion, and at rest it contracts into a hemispherical shape. It performs a rocking motion when disturbed. It is an omnivore.[4]

Gallery[edit]

References[edit]

  1. ^ a b c d Arion (Arion) rufus (Linnaeus 1758), Large red slug MolluscIreland. National Museums Northern Ireland. 2010.
  2. ^ Arion rufus. Integrated Taxonomic Information System (ITIS).
  3. ^ a b Rosetta, R. European red slug. Pacific Northwest Nursery IPM. Oregon State University.
  4. ^ a b c d e f Pearce, T. A., et al. Arion rufus (Linnaeus, 1758), Chocolate Arion. Identification Guide to Land Snails and Slugs of Western Washington.
  5. ^ Arion rufus. NatureServe. 2012.

External links[edit]