Description. Body cylindrical and semi-transparent. Colour light brown. Trunk 5 mm long, 1.8 mm wide. Introvert 2.5 mm long, 1 mm wide. Both ends of trunk with dark brown or black papillae. Papillae on base of introvert 25–40 µm height, 20–30 µm in diameter. Papillae on posterior end of trunk 30–55 µm in length, 17.5–40 µm in diameter. Mid-trunk with small, spare papillae; 15 μm in diameter. Introvert with scattered hooks; 35–60 µm in height (Fig. 4 A). Intestinal spiral with 14 coils. Two pairs of retractors present. Nephridiopores and anus placed at same level. Pear-shaped nephridia 0.75 mm height, 0.2 mm wide. Nephridia length 15 % of trunk length. Two reddish-black eye spots present.
Ecology. In the study area, this species was found on the marine angiosperm Posidonia oceanica at 22 m depth.
Distribution. Northeast Atlantic, Northwest Pacific and Indian Oceans (Saiz Salinas 1993 a); Mediterranean Sea and Red Sea (Cutler 1994).