Sorbeoconcha

Sorbeoconcha
A head-on view of a live individual ofTerebralia palustris,familyPotamididae
Two views of a shell ofCerithium echinatum,familyCerithiidae
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Mollusca
Class:	Gastropoda
Subclass:	Caenogastropoda
Subterclass:	Sorbeoconcha

Sorbeoconchais ataxonomiccladeofsnails,i.e.gastropods,mainlymarinespecies withgillsandopercula,within thecladeCaenogastropoda.

ThetaxonSorbeoconcha was named byWinston PonderandDavid R. Lindbergin 1997.

Taxonomy

1997 taxonomy

According to the older taxonomy by Ponder and Lindberg the suborders within the order Sorbeoconcha are:

• DiscopodaP. Fischer, 1884
• MurchisoniinaCox & Knight, 1960
• HypsogastropodaPonder & Lindberg, 1997
• CerithiimorphaGolikov & Starobogatov, 1975

2005 taxonomy

In thetaxonomy by Bouchet & Rocroi (2005),thecladeSorbeoconcha was declared a taxon of unspecified rank, within the cladeCaenogastropoda.

It comprises thesuperfamilyCerithioidea,the superfamilyCampaniloidea,theinformal groupPtenoglossaand the cladeNeogastropoda.

The following families were not allocated to a superfamily:

• †AcanthonematidaeWenz, 1938
• †CanterburyellidaeBandel, Gründel & Maxwell, 2000
• GlobocornidaeEspinosa & Ortea, 2010
• †PrisciphoridaeBandel, Gründel & Maxwell, 2000

TheWorld Register of Marine Speciesconsiders Sorbeoconcha an alternate representation of Caenogastropoda and gives the following reasoning:

Sorbeoconcha should include [Cerithioidea + Campaniloidea + all Hypsogastropoda (i.e. the remaining Caenogastropoda)], see definition in Ponder & Lindberg, 1997: 225, not only [Cerithioidea + Campaniloidea] as suggested by the indent pattern in Bouchet & Rocroi.

Neotaenioglossa Haller, 1892 suggested in Ruud Bank’s draft for Fauna Europaea is not retained because it would need severe emendation to remove Pyramidellids, Cerithioids, etc.. included in its original definition, and therefore would be too far from Haller's concept if it were to fit the concept of Sorbeoconcha.

Although cladistically sound, the taxon Sorbeoconcha is skipped in the classification scheme because (1) ten years after its publication, the name still sounds unfamiliar to most and (2) it is not very helpful in the classification because it includes the bulk of Caenogastropoda (only keeping out small stem groups Abyssochrysidae, Provannidae, and the architaenioglossate taxa). This is not final, opinions are welcome.