Acavoidea

The Acavoidea are a taxonomic superfamily of air-breathing land snails and slugs, terrestrial pulmonate gastropod mollusks in the informal group Sigmurethra.

This taxonomy was based on the study by Nordsieck, published in 1986.

Taxonomy
Families within the superfamily Acavoidea are as follows:
 * Family Acavidae Pilsbry, 1895
 * Family Caryodidae Conolly, 1915
 * Family Dorcasiidae Conolly, 1915
 * Family Macrocyclidae Thiele, 1926
 * Family Megomphicidae H.B. Baker, 1930
 * Family Strophocheilidae Pilsbry, 1902