Moon-headed Sidegill Slug

''Euselenops luniceps'' is a species of sea slug, a pleurobranchomorph gastropod mollusc in the family Pleurobranchaeidae. ''Euselenops luniceps'' is the type species of the genus ''Euselenops'' and ''Euselenops luniceps'' is the only species in the genus ''Euselenops''.

The radula of this species was studied by Thompson & Bebbington , but they did not publish a description or an image of it.