After excluding groups not related, the informal group

Sigmurethra Sigmurethra is a taxonomic category of air-breathing land snails and slugs, terrestrial pulmonate gastropod molluscs. This is an informal group which includes most land snails and slugs. The two strong synapomorphies of Sigmurethra are a ...

has become the suborder Helicina, with the following infraorders and a collection of families with no superfamily：MolluscaBase eds. (2020). MolluscaBase. Helicina. Accessed through: World Register of Marine Species at: http://www.marinespecies.org/aphia.php?p=taxdetails&id=994701 on 2020-08-25 *Suborder Helicina ("Non-Achatinoid Clade") **Infraorder Arionoidei **Infraorder Clausilioidei **Infraorder Helicoidei: formed from

Helicoidea Helicoidea is a taxonomic superfamily of air-breathing land snails, terrestrial pulmonate gastropod mollusks in the clade Stylommatophora. Taxonomy 2005 taxonomy There are 19 families within the superfamily Helicoidea according to the ta ...

and

Sagdoidea Sagdoidea is a superfamily of air-breathing land snails, terrestrial pulmonate gastropod mollusks in the infraorder Helicoidei of the suborder Helicina. MolluscaBase eds. (2021). MolluscaBase. Sagdoidea Pilsbry, 1895. Accessed through: World Re ...

**Infraorder Limacoidei: formed from original ''

limacoid clade The Limacoidei is a taxonomic infraorder of air-breathing land snails, semislugs and slugs, terrestrial pulmonate gastropod molluscs in the suborder Helicina Distribution The original ancestral area of limacoid families is thought to be the ...

'' **Infraorder Oleacinoidei *** Oleacinoidea: formed from original Testacelloidea but with the family Testacellidae excluded; *** Haplotrematoidea: formed from original

Rhytidoidea The Rhytidoidea are a superfamily of air-breathing land snails and slugs, terrestrial gastropod mollusks in the suborder Helicina. MolluscaBase eds. (2021). MolluscaBase. Rhytidoidea Pilsbry, 1893. Accessed through: World Register of Marine Spec ...

and

Haplotrematidae Haplotrematidae is a taxonomic family of predatory air-breathing land snails, terrestrial pulmonate gastropod mollusks in the superfamily Haplotrematoidea. MolluscaBase eds. (2021). MolluscaBase. Haplotrematidae H. B. Baker, 1925. Accessed th ...

**Infraorder Orthalicoidei **Infraorder

Pupilloidei The Pupilloideiis an taxonomic infraorder of air-breathing land snails, semislugs and slugs, terrestrial pulmonate gastropod molluscs in the suborder Helicina.MolluscaBase eds. (2021). MolluscaBase. Pupilloidei. Accessed through: World Register ...

(

Orthurethra Orthurethra is a clade of air-breathing land snails, terrestrial pulmonate gastropod mollusks in the clade Stylommatophora. In the taxonomy of the Gastropoda by Bouchet & Rocroi, 2005, Orthurethra is treated as an informal group and subcla ...

) **Infraorder Rhytidoidei: formed by

merging with contents from

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 ...

. **Infraorder Succineoidei (

Elasmognatha Elasmognatha is a taxonomic grouping, a clade, of air-breathing land snails and slugs, terrestrial pulmonate gastropod molluscs. A number of species in this taxonomic group are endangered. Taxonomy In the taxonomy of the Gastropoda by Bou ...

) ** Infraorder

Helicina ''Helicina'' is a genus of tropical and subtropical land snails with an operculum, terrestrial gastropod mollusks. This is the type genus of its family (Helicinidae) and subfamily ( Helicinae), as well as the superfamily Helicinoidea. This ...

(temporary name)

References

{{Taxonbar, from=Q56677152 Stylommatophora Mollusc suborders