Helicina (suborder)

After excluding groups not related, the informal group Sigmurethra has become the suborder Helicina, with the following infraorders and a collection of families with no superfamily:
 * Suborder Helicina ("Non-Achatinoid Clade")
 * Infraorder Arionoidei
 * Infraorder Clausilioidei
 * Infraorder Helicoidei: formed from Helicoidea Rafinesque, 1815 and Sagdoidea Pilsbry, 1895
 * Infraorder Limacoidei: formed from original limacoid clade
 * Infraorder Oleacinoidei
 * Oleacinoidea: formed from original Testacelloidea but with the family Testacellidae excluded;
 * Haplotrematoidea: formed from original Rhytidoidea and Haplotrematidae
 * Infraorder Orthalicoidei
 * Infraorder Pupilloidei (Orthurethra)
 * Infraorder Rhytidoidei: formed by Rhytidoidea merging with contents from Acavoidea.
 * Infraorder Succineoidei (Elasmognatha)
 * Infraorder Helicina (temporary name)