Aplysiopsis nigra (Baba, 1949) (Fig. 2)

Hermaeina nigra Baba, 1949: 15, text-fig. 22-23, 33-34, 130-131, pl. 8, fig. 24; Baba, 1959: 332.

Aplysiopsis nigra: Okutani, 2000: 763 .

Materials examined. 1 individual, Seongsan-ri, Seongsan-eup, Seogwipo-si, Jeju-do, Korea, 29 April 2013 (D. Jung) (KOSPIV0000185830) .

Description. Body aeolidiform; ground color black; body length about 23 mm and width 4 mm in preserved specimen. Rhinophore with a white patch reaching from its tip to its eye. Branchial papillae slightly fusiform, black; tips white to yellow, rounded end (Fig. 2A, B); inner surface convex with white veins (Fig. 2C); outer surface flat, veins absent; arranged in 25 rows, forming into 2-4 files. Oral tentacles digitiform, short; tips with yellowish white. Foot little wide anteriorly, posterior narrow; margin yellowish white; sole dark gray (Fig. 2D).

Distribution. Korea, Japan.