Cheliplana stylifera Karling, 1949

Material examined. 6 whole-mounted specimens (SMNH Lectotype 2792, SMNH 82333–82337) and 1 serially sectioned specimen (SMNH 82338) from Germany .

Known distribution. Ahus, Sweden (Karling 1949). Hanko and Balget, Finland (Karling 1949). Eiderstedt Peninsula, Germany (Karling 1963). Amrum, Germany (Schilke 1970). Sylt, Germany (Noldt 1989). Römö, Denmark (Schilke 1970).

Remarks. Specimens are yellow-brown in colour. Karling (1949) reports a total body length of less than 1 mm, with measurements ranging from 0.75 to 0.90 mm. A single adhesive belt is present caudally. The genital opening and atrial organs are situated in the caudal third of the body. Numerous vacuoles were observed in the epithelium. The proboscis hooks are 17–18 μm long.

The copulatory bulb is ~120 μm long [120 μm according to Ax (2008); 123 μm according to Karling (1949)]. The 43–45-µm-long stylet is surrounded by a cirrus armed with very small spines.