Pyramidelloidea

Pyramidelloidea is a superfamily of mostly very small sea snails, marine gastropod mollusks and micromollusks within the clade Panpulmonata.

This is a voluminous taxon: above the species level close to 400 named taxa are referred to this gastropod superfamily.

Pyramidelloidea has both fossil and recent members. They live as ectoparasites on bivalve molluscs and polychaete worms, and have a sharp, piercing stylet instead of a radula.

Distribution

This taxon is found worldwide.

Taxonomy by Schander, Van Aartsen & Corgan (1999):

Superfamily Pyramidelloidea Gray, 1840 Family Amathinidae Ponder, 1987 Family Ebalidae Warén, 1994 - synonym: Anisocyclidae van Aartsen, 1995 Family Odostomiidae Pelseneer, 1928 Subfamily Odostomiinae Pelseneer, 1928 Subfamily Chrysallidinae Saurin, 1958 Subfamily Odostomellinae Saurin, 1958 Subfamily Cyclostremellinae Moore, 1966 Family Pyramidellidae J. E. Gray, 1840 Subfamily Pyramidellinae J.E. Gray, 1840 Subfamily Sayellinae Wise, 1996 Family Syrnolidae Saurin, 1958 Subfamily Syrnolinae Saurin, 1958 Subfamily Tiberiinae Saurin, 1958 Family Turbonillidae Bronn, 1849 Subfamily Turbonillinae Bronn, 1849 Subfamily Eulimellinae Saurin, 1958 Subfamily Cingulininae Saurin, 1959

Pyramidelloidea has been classified within the informal group Lower Heterobranchia in the taxonomy of Bouchet & Rocroi (2005).

Taxonomy of Bouchet & Rocroi, 2005:

Superfamily Pyramidelloidea Family Pyramidellidae Family Amathinidae † Family Heteroneritidae Family Murchisonellidae

Jörger et al. (2010) have redefined major groups within the Heterobranchia and they moved Pyramidelloidea to Panpulmonata.