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

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

They live as ectoparasites on bivalve molluscs and polychaete worms, and have a sharp, piercing stylet instead of a radula.

Taxonomy by Schander, Van Aartsen & Corgan (1999):[4] Pyramidelloidea has been classified within the informal group Lower Heterobranchia in the taxonomy of Bouchet & Rocroi (2005).

[5] Taxonomy of Bouchet & Rocroi, 2005: Jörger et al. (2010)[2] have redefined major groups within the Heterobranchia and they moved Pyramidelloidea to Panpulmonata.