Cheliplana microcirrus Noldt, 1989

Material examined. None.

Known distribution. Sylt, Germany (Noldt 1989).

Remarks (summarised from literature). Live specimens are transparent and ~680 μm long. The proboscis has a pair of 12-µm-long, slender hook supports, which bear 11-µm-long proboscis hooks. Proboscis sidepieces are not present. The prepharyngeal cavity is unarmed. The pharynx is ~150 μm long and 70 μm in width.

A single testis is situated adjacent to the pharynx. A pair of seminal vesicles, ~100 μm long and 25 μm wide, and a cluster of prostatic glands enter the proximal end of the copulatory bulb. Only one type of prostatic glands and secretion appears present. The entire copulatory bulb is ~68 μm long, with a diameter of 25–29 μm. The most distal end of the ejaculatory duct is widened to form a canal with folded, likely sclerotised walls. It continues into a symmetrically armed cirrus of ~12 μm, with spines measuring 1.5–2 μm.

A single ovary is situated alongside the copulatory bulb. The vitellarium is unpaired and a bursa is located caudal to the gonopore. No sclerotised spermatic duct or vagina externa is present.