Philinoidea is a taxonomic superfamily of sea slugs, specifically headshield slugs, marine gastropod mollusks in the order Cephalaspidea.

[1] The species in the Superfamily Philinoidea are generally small animals that have an internal or external shell, and a covered gill.

Unlike some related forms, the visceral mass is not sharply set off from the rest of the body.

[2] According to the latest taxonomy, the following families are recognised in the Superfamily Philinoidea:[1]

This Heterobranchia-related article is a stub.