About Nemesignis banyulensis (Portmann & Sandmeier, 1960)
Nemesignis is a genus of aeolid nudibranch sea slugs, which are marine gastropod mollusks belonging to the family Myrrhinidae. This genus contains only one single species: Nemesignis banyulensis, originally described by Portmann & Sandmeier in 1960. This species is distributed in the Mediterranean Sea and the adjacent Atlantic Ocean.