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.
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".
Parkhaev (2006, 2007)[4][5] created the class Helcionelloida, whose members were previously treated as "Paleozoic molluscs of uncertain systematic position" sensu Bouchet & Rocroi.
[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.
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.
[8] Trochoidea Phasianelloidea Angarioidea 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.
[19] In 2015, in the Journal of Molluscan Studies, Puillandre, Duda, Meyer, Olivera & Bouchet presented a new classification for the old genus Conus.
The results suggested that the authors should place all cone snails in a single family, Conidae, containing four genera: Conus, Conasprella, Profundiconus and Californiconus.
Golding et al. (2007)[23] established new families within the Amphiboloidea: Uit de Weerd (2008)[24] moved two families Urocoptidae and Cerionidae to the newly established superfamily Urocoptoidea, based on molecular phylogeny research as follows:[24] superfamily Urocoptoidea Other authors also made numerous taxonomic changes within Orthalicoidea in 2009-2012.