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)[1] showed that the traditional classification of the Euthyneura needed to be reconsidered. The change was subsequently made by Jörger et al. (2010),[2] 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".[3]
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)[4][5] created the class Helcionelloida, whose members were previously treated as "Paleozoic molluscs of uncertain systematic position" sensu Bouchet & Rocroi.
This revised taxonomy of the Patellogastropoda (the true limpets) is based on research by Nakano & Ozawa (2007).[6] 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:
Geiger (2009)[7] 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.[7]
The superfamily Trochoidea was redefined by Williams et al. (2008)[8] and the superfamily Turbinoidea is no longer used. Phasianelloidea and Angarioidea were created as new superfamilies.[8]
The superfamily Neomphaloidea was previously regarded as belonging within the clade Vetigastropoda. Molecular phylogeny has shown however that it belongs in its own clade, Neomphalina, which is endemic to deep-sea hydrothermal vent habitat. The clade Neomphalina appears to be basal to the Vetigastropoda.[9] Neomphalina is a monophyletic clade, however, its exact relationship among the gastropods is uncertain.[10]
Neritimorpha
Bandel (2007)[11] described four new families within the Neritopsoidea. He classified Neritopsoidea in the order Neritoina within the superorder Cycloneritimorpha and within the subclass Neritimorpha.[11] Bandel (2007) recognizes Natisopsinae (in Neritopsidae by Bouchet & Rocrois 2005) at the family level, as Naticopsidae. Bandel's classification looks like this:
Fehse (2007)[16] elevated both the subfamily Pediculariinae and the tribe Eocypraeini (which were previously in the family Ovulidae) to family level, based on both morphological research and molecular phylogeny research.[16] Families within Cypraeoidea are now as follows:
In 2012, within the Conoidea, a new family Bouchetispiridae Kantor, Strong & Puillandre, 2012 that includes one genus Bouchetispira Kantor, Strong & Puillandre, 2012 and one species Bouchetispira vitrea Kantor, Strong & Puillandre, 2012, was discovered.[19]
In 2015, in the Journal of Molluscan Studies, Puillandre, Duda, Meyer, Olivera & Bouchet presented a new classification for the old genus Conus. Using 329 species, the authors carried out molecular phylogenetic analyses. The results suggested that the authors should place all cone snails in a single family, Conidae, containing four genera: Conus, Conasprella, Profundiconus and Californiconus. The authors group 85% of all known cone snail species under Conus, They recognize 57 subgenera within Conus, and 11 subgenera within the genus Conasprella. .[20]
Thompson (2010)[31] redefined subfamilies in Spiraxidae, moving Euglandininae and Streptostylinae (from where they had been in the Oleacinidae per Bouchet & Rocroi (2005)) so that they became subfamilies of Spiraxidae.
^Strong, Ellen E.; Köhler, Frank (2009). "Morphological and molecular analysis of 'Melania' jacquetiDautzenberg and Fischer, 1906: From anonymous orphan to critical basal offshoot of the Semisulcospiridae (Gastropoda: Cerithioidea)". Zoologica Scripta. 38 (5): 483. doi:10.1111/j.1463-6409.2008.00385.x. S2CID86163594.
^Bandel K. (2006). "Families of the Cerithioidea and related superfamilies (Palaeo-Caenogastropoda; Mollusca) from the Triassic to the Recent characterized by protoconch morphology - including the description of new taxa". Freiberger Forschungshefte C 511: 59-138. PDF[permanent dead link].
^Beu A.G. (2008). "Recent deep-water Cassidae of the world. A revision of Galeodea, Oocorys, Sconsia, Echinophoria and related taxa, with new genera and species (Mollusca, Gastropoda)". In> Héros V., Cowie R. H. & Bouchet P. (eds.). Tropical Deep-Sea Benthos 25. Mémoires du Muséum National d'Histoire Naturelle196: 269-387.
^ abMalaquias, Manuel António E; Mackenzie-Dodds, Jacqueline; Bouchet, Philippe; Gosliner, Terrence; Reid, David G (2009). "A molecular phylogeny of the Cephalaspideasensu lato(Gastropoda: Euthyneura): Architectibranchia redefined and Runcinacea reinstated". Zoologica Scripta. 38: 23–41. doi:10.1111/j.1463-6409.2008.00354.x. S2CID84535763.
