Arion agg
Arion anthracius
Arion ascensionis
Arion ater (black slug)
Arion atripunctatus
Arion baeticus
Arion brunneus
Arion circumscriptus (Brown-banded arion)
Arion distinctus (Common garden slug)
Arion euthymeanus
Arion fagophilus
Arion fasciatus (Orange-banded Arion)
Arion flagellus (Durham slug)
Arion franciscoloi
Arion fuligineus
Arion fuscus (Dusky Arion)
Arion gilvus
Arion hispanicus
Arion hortensis (garden slug)
Arion incommodus
Arion incommudus
Arion intermedius
Arion iratii (Vulnerable)
Arion lizarrustii
Arion luisae (Slug of Espad�n) (Critically Endangered)
Arion lusitanicus (Portuguese slug)
Arion magnus
Arion molinae
Arion nobrei
Arion obesoductus
Arion occultus
Arion owenii
Arion pascalianus
Arion paularensis
Arion ponsi
Arion rufus (red slug)
Arion sibiricus
Arion silvaticus
Arion simrothi
Arion spec
Arion subfuscus
Arion transsylvanus
Arion urbiae
Arion vulgaris (Spanish slug)
Arion wiktori