Facelina annulicornis is a species of sea slugs, an aeolid nudibranch, a marine gastropod mollusc in the family Facelinidae.

[2] This species has been reported from County Donegal, Ireland south to Portugal and the Mediterranean Sea.

[3] Facelina annulicornis is a predator of the hydroid Halecium halecium and probably other hydroids and possibly other aeolid nudibranchs.

[4]