Helicina (suborder)
Helicina is a suborder of land gastropods which consists of former members of the informal group Sigmurethra which were proven to make a clade. It encompasses the following infraorders along with a collection of families with no superfamily:
- Suborder Helicina
- *Infraorder Arionoidei
- *Infraorder Clausilioidei
- *Infraorder Helicoidei: formed from Helicoidea and Sagdoidea
- *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
- *Infraorder Rhytidoidei: formed by Rhytidoidea merging with contents from Acavoidea.
- *Infraorder Succineoidei
- * Infraorder Helicina