Runcinoidea is a taxonomic superfamily (according to the taxonomy of the Gastropoda by Bouchet & Rocroi, 2005) or a clade Runcinaecea (according to the Malaquias et al. (2009)) of sea slugs, marine gastropod mollusks in the order Runcinida
Runcinoidea was recognized as a superfamily in the clade Cephalaspidea, within the informal group Opisthobranchia in the taxonomy of the Gastropoda by Bouchet & Rocroi, 2005).
They also recognized two families, Runcinidae and Ilbiidae.
Malaquias et al. (2009) reinstated Runcinacea as a valid taxon outside the Cephalaspidea.
They also recognized two families Runcinidae (with genus Runcina) and Ilbiidae, but they did not mention superfamilies.
Jörger et al. 2010 moved Runcinacea to the Euopisthobranchia.
Runcinoidea was classified in the order Runcinida by the revised classification of the Gastropoda.
Families within the Runcinoidea include: