Sea slugs (Gastropoda: Heterobranchia) from Rio Grande do Norte, Northeastern Brazil Author Delgado, Marlon Author Freire, Fúlvio Aurélio de Morais Author Meirelles, Carlos Augusto Oliveira de Author Padula, Vinicius Author Bahia, Juliana Author Brandão, Simone Nunes text Papéis Avulsos de Zoologia 2022 2022-11-01 62 1 26 http://dx.doi.org/10.11606/1807-0205/2022.62.063 journal article 10.11606/1807-0205/2022.62.063 1807-0205 7617672 19. Berthella vialactea Ghanimi, Schrödl, Goddard, Ballesteros, Gosliner & Valdés, 2020 ( Fig. 3D ) Material examined: Praia de Pirambúzios, Nísia Floresta, 13.II.2010 , one specimen (lost), 8 mm (body length). Praia de Baia Formosa , Baia Formosa , 05.VII.2009 , two specimens , 10-14 mm (body length), leg. M . Delgado) ( MZSP 97065; GEEFAA 304). Description: Elongate oval body, 8-14 mm body length. Mantle broad and smooth covering the foot. Dorsum translucent white or milk white, with numerous small white opaque spots. Near the center of the dorsum there is one transversal, white, opaque bar with variably shaped pattern resembling a " T ″, "Y″ or irregular shaped. Large oral veil, trapezoidal, translucent-white with some small white opaque spots.Retractile rhinophores emerging between mantle and oral veil, rolled and arcuated. Mid-dorsally covered by the smooth notum, whitish coloration, protected by the inner shell. Gills on right side of the body and located between the inferior part of the mantle and the superior part of the foot. Inner shell oval, convex, covering part of body and translucent white. Geographic distribution: Western Atlantic: Martinique ( Ghanimi et al., 2020 ) and Brazil ( Rio Grande do Norte – present study). Remarks: Similar in color and shape to Berthella nebula but with translucent shell ( Ghanimi et al., 2020 ).