Bosellia is a genus of sea slugs in the family Plakobranchidae.
Distribution include warm waters in Mediterranean and in Atlantic Ocean. Reports from Indo-Pacific were not confirmed.
There are five recognized species in the genus Bosellia:
Bosellia cohellia has an uncertain taxonomic status according to Jensen (2007).
Phylogenetic results by Händeler et al. (2009) indicate that the Caribbean "Bosellia marcusi" described by Eveline Agnes du Bois-Reymond Marcus (1972)[1] is a derived species of Elysia. Morphological examination indicates that the parapodia of "B. marcusi" have secondarily fused over the dorsum, producing a superficial similarity with Bosellia. Bosellia marcusi Marcus, 1972 is a synonym for Elysia marcusi (Marcus, 1972).
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