Aldisa banyulensis is a species of sea slug, a dorid nudibranch, a marine gastropod mollusk in the family Cadlinidae.MolluscaBase (2018). Aldisa banyulensis Pruvot-Fol, 1951. Accessed on 2018-12-03.
Distribution This species was described from Banyuls-sur-Mer, France. It is also reported from the Mediterranean coast of Spain.Garcia, F.J., Garcia-Gomez, J.C. & Cervera, J.L. (1986) Ridescrizione di Aldisa banyulensis Pruvot-Fol, 1951 (Mollusca: Gastropoda: Nudibranchia). Lavori della Societe Italiana di Malacologia, 22: 97-110.
Description Aldisa banyulensis is a small sea slug that is normally 8–12 mm in length. It is red or orange-red in colour with two oval markings on the midline of the back which resemble the inhalent pore-sieves of its sponge food. There are pale streaks running from the sides of the back to the edge of the mantle and between the rhinophores.Rudman, W.B., 2002 (November 11) Aldisa banyulensis Pruvot-Fol 1951. [In] Sea Slug Forum. Australian Museum, Sydney.
Ecology This species is reported to feed on the sponge Hemimycale columella (Hymedesmiidae).
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