See text The Testacelloidea are a superfamily of air-breathing land snails and slugs, terrestrial gastropod molluscs in the suborder Helicina of the order Stylommatophora.

[1][2] The families within the Testacelloidea are as follows:[1] This taxonomy was based on the study by Nordsieck, published in 1986,[3] and the publication by Schileyko in 2000.

[4] The following families, previously categorized within the Testacelloidea, were transferred to the superfamily Oleacinoidea H. Adams & A. Adams, 1855 in 2017.

[5]