This overview lists proposed changes in the taxonomy of gastropods at the family level and above since 2005, when the taxonomy of the Gastropoda by Bouchet & Rocroi (2005) was published. In other words, these are recent updates in the way various groups of snails and slugs are classified.
Changes in subfamilies are outlined in the respective articles about each particular family. Unchanged taxa are not listed here.
In one of the largest recent changes (affecting the most species of gastropods), Klussmann-Kolb et al. (2008) showed that the traditional classification of the Euthyneura needed to be reconsidered. The change was subsequently made by Jörger et al. (2010), who redefined the major groups within the Heterobranchia.
A great number of major changes have been made within the classification of the Conoidea since 2011.
In the 2017 issue of "Malacologia" journal (available online from 4 January 2018) new much updated version of 2005 "Bouchet & Rocroi" taxonomy was published: "Revised Classification, Nomenclator and Typification of Gastropod and Monoplacophoran Families".
Helcionelloida (not gastropods) It has become clear that the fossil taxon Helcionelloida does not belong to the class Gastropoda; it is now a separate class within the Mollusca. P. Yu. Parkhaev (2006, 2007) created the class Helcionelloida, whose members were previously treated as "Paleozoic molluscs of uncertain systematic position" sensu Bouchet & Rocroi.
Subclass Archaeobranchia Parkhaev, 2001
Order Helcionelliformes Golikov & Starobogatov, 1975
Superfamily Helcionelloidea Wenz, 1938
Family Helcionellidae Wenz, 1938
Family Igarkiellidae Parkhaev, 2001
Family Coreospiridae Knight, 1947
Superfamily Yochelcionelloidea Runnegar & Jell, 1976
Family Trenellidae Parkhaev, 2001
Family Yochelcionellidae Runnegar & Jell, 1976
Family Stenothecidae Runnegar & Jell, 1980
Subfamily Stenothecinae Runnegar & Jell, 1980
Subfamily Watsonellinae Parkhaev, 2001
Order Pelagiellifomes MacKinnon, 1985
Family Pelagiellidae Knight, 1952
Family Aldanellidae Linsley et Kier, 1984
Subclass Divasibranchia Minichev & Starobogatov, 1975
Order Khairkhaniiformes Parkhaev, 2001
Family Khairkhaniidae Missarzhevsky, 1989
Subclass Dextrobranchia Minichev & Starobogatov, 1975
Order Onychochiliformes Minichev & Starobogatov, 1975
Family Onychochilidae Koken, 1925
Patellogastropoda
This revised taxonomy of the Patellogastropoda (the true limpets) is based on research by Nakano & Ozawa (2007). The Acmaeidae is treated as a synonym of Lottiidae; the subfamily Pectinodontinae is elevated to Pectinodontidae; a new family Eoacmaeidae with the new type genus Eoacmaea is established. The remaining three families (Neolepetopsidae, Daminilidae, Lepetopsidae) are moved into the Lottioidea, like this: superfamily Eoacmaeoidea family Eoacmaeidae superfamily Patelloidea family Patellidae superfamily Lottioidea family Nacellidae family Lepetidae family Pectinodontidae family Lottiidae family Neolepetopsidae † family Daminilidae † family Lepetopsidae
Vetigastropoda
Geiger (2009) elevated the subfamily Depressizoninae to family level as Depressizonidae. Also two subfamilies (the Larocheinae from the Scissurellidae, and the Temnocinclinae from the Sutilizonidae) were upgraded to family level as the Larocheidae and the Temnocinclidae. Superfamily Lepetodriloidea Family Lepetodrilidae Family Clypeosectidae Family Sutilizonidae Family Temnocinclidae Superfamily Scissurelloidea Family Scissurellidae Family Larocheidae Family Anatomidae Family Depressizonidae
The superfamily Trochoidea was redefined by Williams et al. (2008) and the superfamily Turbinoidea is no longer used. Phasianelloidea and Angarioidea were created as new superfamilies.
Trochoidea
Trochidae
Turbinidae
Solariellidae
Calliostomatidae
Liotiidae
† Family Elasmonematidae
† Family Eucochlidae
† Family Microdomatidae
† Family Proconulidae
† Family Tychobraheidae
† Family Velainellidae
Phasianelloidea
Phasianellidae
Colloniidae
Angarioidea
Angariidae - monotypic with Angaria
Areneidae (probable placement)