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 cubana n. sp. Diez, Gobert, Reygel & Artois Fig. 1C–E Etymology. Species epithet refers to the island of Cuba , where the species was found. Material examined. Holotype . CUBA • 1 whole mount; Holguín province , Gibara municipality, Bahía de Gibara ; 17 Feb. 2016 ; sublittoral, to a depth of up to 0.4 m , sandy bottom with many seashell fragments and organic material, salinity 32‰; KV.634. Other material. CUBA • 5 whole mounts; Holguín province , Gibara municipality, Bahía de Gibara ; 17 Feb. 2016 ; sublittoral, to a depth of up to 0.4 m , sandy bottom with many seashell fragments and organic material, salinity 32‰; X.3.21–X.3.25 • 15 whole mounts; Holguín province , Banes municipality, Guardalavaca; 28 Feb. 2017 ; intertidal, superficial fine sand around roots of Avicennia germinans , salinity 35‰; HU X.2.08–X.2.22 • 3 whole mounts; Holguín province , Banes municipality, Macabi; sublittoral fine sand, 0.3 m deep, salinity 34‰; HU X.2.23–X.2.25 . FIGURE 1 . A–B . Cheliplana asinaraensis n. sp. A . Habitus of the live specimen. B . Camera lucida drawing of the scerotised cirrus. C–E . Cheliplana cubana n. sp. C . Habitus of the live specimen. D . Camera lucida drawing of the cirrus with the distal part everted. E . Camera lucida drawing of the cirrus and prostatic vesicle of the holotype specimen. Scale bars: B = 20 μm; D, E = 50 μm. Description. Whole-mounted specimens are 0.6–1.6 mm ( x = 0.9 mm ; n = 16) long. The body is unpigmented, transparent. The proboscis (p, Fig. 1C ) has a pair of small, curved hooks measuring 10–19 µm ( x = 15 µm , n = 8), each with a dilated base and pointy tip. Hook supports are ~ 11 µm long. The pharynx bulb is relatively small and measures approximately 1/9 of the total body length (ph, Fig. 1C ). The anterior edge of the pharynx bulb bears a number of anteriorly projecting papillae. The mouth is situated behind the proboscis and connects to the pharynx bulb via a long, unarmed, oral tube (ppc, Fig. 1C ). The common genital opening, situated anterior to the haptic girdle at approximately 7/8 of the body length, is surrounded by clusters of glands that are conspicuous in live specimens. One large testis is located in the anterior half of the body, posterior to the pharynx (t, Fig. 1C ). The male copulatory organ is situated in the posterior part of the body. A pair of elongated seminal vesicles enter the proximal end of the copulatory bulb separately (vs, Fig. 1C ). A small prostatic vesicle occupies the proximal part of the copulatory bulb (vg, Fig. 1C ). The tubular cirrus is 117–173 µm long ( x = 152 μm, n = 21), with the distal part forming a U-shaped bend (ci, Fig. 1C ; Fig. 1D–E ). The cirrus is armed with small spines over its entire length, though only the distal end was observed to be eversible. Few details of the female system could be observed: aAsingle ovary is present near the caudal end of the body (ov, Fig. 1C ). A large, vacuolated bursa is situated beside the male copulatory bulb (b, Fig. 1C ).