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:^[1][2]

• Suborder Helicina ("Non-Achatinoid Clade")
  • Infraorder Arionoidei
  • Infraorder Clausilioidei
  • Infraorder Helicoidei: formed from Helicoidea Rafinesque, 1815 and Sagdoidea Pilsbry, 1895^[3]
  • Infraorder Limacoidei: formed from original limacoid clade
  • Infraorder Oleacinoidei^[4]
    • Oleacinoidea: formed from original Testacelloidea but with the family Testacellidae excluded;
    • Haplotrematoidea: formed from original Rhytidoidea and Haplotrematidae^[5]
  • Infraorder Orthalicoidei
  • Infraorder Pupilloidei (Orthurethra)
  • Infraorder Rhytidoidei: formed by Rhytidoidea merging with contents from Acavoidea.
  • Infraorder Succineoidei (Elasmognatha)
  • Infraorder Helicina (temporary name)

Helicina
Truncatellina cylindrica
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Mollusca
Class:	Gastropoda
Subclass:	Heterobranchia
Subcohort:	Panpulmonata
Superorder:	Eupulmonata
Order:	Stylommatophora
Suborder:	Helicina Rafinesque, 1815