On the genus Typhlopolycystis Karling, 1956 (Platyhelminthes, Kalyptorhynchia, Polycystididae), with data on the five known species and the description of eleven new species Author Schockaert, Ernest R. Author Moons, Patricia Author Janssen, Toon Author Tessens, Bart S. Author Reygel, Patrick C. Author Revis, Nathalie Author Jouk, Philippe E. H. Author Willems, Wim R. Author Artois, Tom J. text Zootaxa 2019 2019-05-08 4603 1 81 104 journal article 26901 10.11646/zootaxa.4603.1.4 1fa78a19-6a9c-498b-89b5-a0d6ceb58080 1175-5326 2673305 9539EFE1-7676-4015-946B-9F1A2782AB38 Typhlopolycystis coeca Karling, 1956 ( Fig. 2 ) Diagnosis . Yellowish species of Typhlopolycystis , 1.5 mm long with a very large proboscis (1/3 of body length) and no eyes. Prostate vesicle and accessory secretion vesicle well developed. The prostate stylet is a short and straight gutter without thickenings ( 20–25 µm long) and the accessory stylet is a slightly curved tube, 26–30 µm long, both sitting on a ring with a diameter of about 25–30 µm over its largest cross section. Occurrence . Sweden : Kristineberg, Bredungen, silty bottom at 38 m ( type locality). Other localities near Kristineberg (by Westblad and Karling). Germany : several sublittoral stations in the Bight of Kiel (by Ax) (see Karling, 1956 ); Koningshaven on the Island of Sylt (medium sand, eulittoral)(by Ax, 16 August 1965 , Noldt, 1989 ). Studied material : the holotype (SMNH type nr 2701), one more whole mount of an animal from the Kristineberg area (SMNH nr 82300), and one from Sylt (SMNH nr 43585).