A revision of the genus Cheliplana de Beauchamp, 1927 (Rhabdocoela: Schizorhynchia), with the description of six new species Author Gobert, Stefan 0000-0003-1949-9174 Hasselt University, Centre for Environmental Sciences, Research Group Zoology: Biodiversity and Toxicology, Universitaire Campus Gebouw D, B- 3590 Diepenbeek, Belgium. & stefan. gobert @ uhasselt. be; https: // orcid. org / 0000 - 0003 - 1949 - 9174 stefan.gobert@uhasselt.be Author Diez, Yander L. 0000-0001-8741-4799 Hasselt University, Centre for Environmental Sciences, Research Group Zoology: Biodiversity and Toxicology, Universitaire Campus Gebouw D, B- 3590 Diepenbeek, Belgium. & University of Oriente, Departement of Biology and Geography, Avenida Patricio Lumumba s / n, CP 90500, Santiago de Cuba, Cuba. Beaty Biodiversity Research Centre, Departments of Botany and Zoology, University of British Columbia, 3529 - 6270 University Blvd, Vancouver, BC, V 6 T 1 Z 4 Canada. & yander @ uo. edu. cu; https: // orcid. org / 0000 - 0001 - 8741 - 4799 yander@uo.edu.cu Author Monnens, Marlies 0000-0002-9133-1512 Hasselt University, Centre for Environmental Sciences, Research Group Zoology: Biodiversity and Toxicology, Universitaire Campus Gebouw D, B- 3590 Diepenbeek, Belgium. & marlies. monnens @ uhasselt. be; https: // orcid. org / 0000 - 0002 - 9133 - 1512 marlies.monnens@uhasselt.be Author Reygel, Patrick 0000-0001-8721-6290 Hasselt University, Centre for Environmental Sciences, Research Group Zoology: Biodiversity and Toxicology, Universitaire Campus Gebouw D, B- 3590 Diepenbeek, Belgium. & patrick. reygel @ uhasselt. be; https: // orcid. org / 0000 - 0001 - 8721 - 6290 patrick.reygel@uhasselt.be Author Van Steenkiste, Niels W. L. 0000-0002-2676-7862 niels. vansteenkiste @ botany. ubc. ca; https: // orcid. org / 0000 - 0002 - 2676 - 7862 niels.vansteenkiste@botany.ubc.ca Author Leander, Brian S. 0000-0003-0798-0470 bleander @ mail. ubc. ca; https: // orcid. org / 0000 - 0003 - 0798 - 0470 bleander@mail.ubc.ca Author Artois, Tom Hasselt University, Centre for Environmental Sciences, Research Group Zoology: Biodiversity and Toxicology, Universitaire Campus Gebouw D, B- 3590 Diepenbeek, Belgium. text Zootaxa 2021 2021-05-17 4970 3 453 494 journal article 6258 10.11646/zootaxa.4970.3.2 281c9017-f55b-47bf-bea0-e511a7173605 1175-5326 4766692 FEABE248-E1EA-48F5-A1AF-0077FE40C257 Cheliplana paradoxa Noldt, 1989 Synonyms . Dactyloplana paradoxa ( Noldt, 1989 ) Armonies, 2018 Material examined. None. Known distribution . Sylt, Germany ( Noldt 1989 ). Remarks (summarised from literature) . Noldt (1989) describes C. paradoxa as a comparatively small species of Cheliplana , with a total body length of 370–580 μm in fixed specimens. The prepharyngeal cavity is relatively short and unarmed. The pharynx is cylindrical and situated in the anterior body half. The proboscis hooks are 21–25 μm long. The 11–15-µm-long proximal part of each hook is straight and tubiform, and distally splits into a pair of slightly curved, 10–11-µm-long hooks. Noldt (1989) did not observe proboscis sidepieces. A single testis is located alongside the pharynx. Seminal vesicles are paired and enter the copulatory bulb proximally. Strongly developed longitudinal muscles surround the copulatory bulb. The distal part of the copulatory bulb is filled with parenchymatic tissue, while the proximal part is taken up by a prostatic vesicle. The ejaculatory duct distally forms a sclerotised cirrus, which is divided into three distinct regions: a proximal, ~13–15-µm-long, unarmed section; a middle section with a diameter of 4–5 μm, armed with very small spines; and a distal section with a diameter of 11–13 μm, asymmetrically provided with 4-µm-long spines. A single genital opening was observed. Noldt (1989) did not observe any female genital organs.