Helicina (suborder) explained

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 and Sagdoidea ^[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)

Notes and References

1. 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
2. Bouchet. Philippe. Jean-Pierre Rocroi . Rocroi. Jean-Pierre. Hausdorf. Bernhard. Kaim. Andrzej. Kano. Yasunori. Nützel. Alexander. Parkhaev. Pavel. Schrödl. Michael. Strong. Ellen E.. 2017. Revised Classification, Nomenclator and Typification of Gastropod and Monoplacophoran Families. Malacologia. 1–2. 0076-2997. 1–526. 61. 10.4002/040.061.0201. 91051256 . Philippe Bouchet .
3. 2018 . Helicoidei . 1057261 . 2018-08-01 . MolluscaBase.
4. MolluscaBase . 2018 . Oleacinoidei . 1057260 . 2018-08-01.
5. MolluscaBase . 2018 . Haplotrematoidea H.B. Baker, 1925 . 994702 . 2018-08-01 .