Redescription of "Algarvia alba" García-Gómez & Cervera, 1989 (Mollusca, Nudibranchia, Aeolidioidea) from the Ría de Ferrol (Galicia, NW Iberian Peninsula).
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Algarvia alba García-Gómez & Cervera, 1989 is a little-known nudibranch mollusk (Aeolidioidea: Facelinidae) that inhabits sandy-rocky substrates along the Atlantic coast of the Iberian Peninsula. This species is only known from 3 specimens, two corresponding to the type series and collected in Algarve (Portugal), and one specimen photographed in Getaria (Basque Country). The anatomy of a new specimen collected from the Ría de Ferrol is described in detail for the first time by means of X-ray microcomputed tomography (Micro-CT); this non-destructive technique allows obtaining sequential images of the sagittal, frontal and transverse planes. The systematics of Facelinidae is not properly resolved yet and therefore we propose to keep Algarvia in this family until more information becomes available.
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