Arionoidea

Arionoidea is a taxonomic group, superfamily of air-breathing land slugs, shell-less terrestrial pulmonate gastropod mollusks.

Families
Families within the superfamily Arionoidea include:
 * Arionidae
 * Anadenidae
 * Ariolimacidae
 * Binneyidae
 * Oopeltidae
 * Philomycidae