Hoploplana divae Marcus, 1950

Fig. 25 E – H

Material examined.

Campeche coast, Mexico • 1; Cayo Arcas; 20.2°N, 92.0°W; 5.3 m; 23 Apr. 2018; A. Hernández leg.; CRPPY -0073 • 1; Cayo Arcas; 20.2°N, 92.0°W; 13.2 m; 24 Apr. 2018; A. Hernández leg.; CRPPY -0080 .

Distribution.

Originally described in São Paulo, Southeast of Brazil (Marcus 1950) and later by Bahia and Schrödl (2018). Holoplana divae has been documented in Rio Grande do Norte, Brazil (Bahia et al. 2012) and Curaçao (Marcus and Marcus 1968). This study marks a novel record for the Campeche coast and new record for the Gulf of Mexico.

Description.

Body shape oval with rounded anterior and posterior end, 1.2 cm in length and 0.6 cm in width. Two small cylindrical nuchal tentacles (Fig. 25 E, G). Tentacular eyes at base of tentacles. Cerebral eyes two sparse clusters, extending towards anterior and posterior regions of body. Colouration semi-translucent, orange to pinkish. Dorsal epidermis covered with numerous semi-cylindrical whitish papillae. Largest papillae in posterior region. Highly folded ruffled pharynx, characteristic of the species of the genus Hoploplana . Oral opening situated in the anterior 1 / 2 of the body (Fig. 25 F, H). Male and female gonopores close to each other, distinctly separated and open near the posterior end (Fig. 25 F, H).