Description, redescription and revision of sixteen putatively closely related species of Echinoderes (Kinorhyncha: Cyclorhagida), with the proposition of a new species group - the Echinoderes dujardinii group Author Sørensen, Martin V. 4143D650-12FC-4914-93F5-2C39339A7156 Natural History Museum of Denmark, University of Copenhagen, DK- 2100 Copenhagen, Denmark. Department of Invertebrate Zoology, Smithsonian National Museum of Natural History, Washington, DC 20560, USA. Department of Biological Science, College of Natural and Life Sciences, Daegu University, Gyeongsan 38453, Korea. Crescent International School, Bario, Govindpur, Dhanbad 828109, Jharkhand, India. Isparta University of Applied Sciences, Department of Aquaculture, 32260 Isparta, Turkey. Department of Biology, University of Copenhagen, DK- 2100 Copenhagen, Denmark. Silifke Vocational School Aquaculture Program, Mersin University, 33940 Mersin, Turkey. Faculty of Arts and Science, Kyushu University, Fukuoka 819 - 0395, Japan. mvsorensen@snm.ku.dk Author Goetz, Freya E. 5849A537-F762-4B25-9493-E8B32690C49D Department of Invertebrate Zoology, Smithsonian National Museum of Natural History, Washington, DC 20560, USA. GoetzF@si.edu Author Herranz, María 2A7DE5DC-FF82-49CC-9DD4-CC0AFA1B281B Natural History Museum of Denmark, University of Copenhagen, DK- 2100 Copenhagen, Denmark. Department of Invertebrate Zoology, Smithsonian National Museum of Natural History, Washington, DC 20560, USA. Department of Biological Science, College of Natural and Life Sciences, Daegu University, Gyeongsan 38453, Korea. Crescent International School, Bario, Govindpur, Dhanbad 828109, Jharkhand, India. Isparta University of Applied Sciences, Department of Aquaculture, 32260 Isparta, Turkey. Department of Biology, University of Copenhagen, DK- 2100 Copenhagen, Denmark. Silifke Vocational School Aquaculture Program, Mersin University, 33940 Mersin, Turkey. Faculty of Arts and Science, Kyushu University, Fukuoka 819 - 0395, Japan. maria.herranz@bio.ku.dk Author Chang, Cheon Young 497A5735-AA95-498A-A1B8-58180C2ACA33 Department of Biological Science, College of Natural and Life Sciences, Daegu University, Gyeongsan 38453, Korea cychang@daegu.ac.kr Author Chatterjee, Tapas F35C0625-55F6-4307-A7BE-93416BE6F0D7 Crescent International School, Bario, Govindpur, Dhanbad 828109, Jharkhand, India. drtchatterjee@gmail.com Author Durucan, Furkan 62189A90-E675-49B1-BE3C-F4657CA40EE4 Isparta University of Applied Sciences, Department of Aquaculture, 32260 Isparta, Turkey. f_durucan@hotmail.com Author Neves, Ricardo C. C2B164FF-E8D8-468E-A07E-C39E1C71E65E Department of Biology, University of Copenhagen, DK- 2100 Copenhagen, Denmark. ricardon.6@gmail.com Author Yildiz, N. Özlem CE2E097A-4499-498C-980E-F21A4156F76E Silifke Vocational School Aquaculture Program, Mersin University, 33940 Mersin, Turkey. nozlemkoroglu@gmail.com Author Norenburg, Jon B8710D9A-1549-4E17-AF4F-6B598744C02E Department of Invertebrate Zoology, Smithsonian National Museum of Natural History, Washington, DC 20560, USA. NORENBUR@si.edu Author Yamasaki, Hiroshi Faculty of Arts and Science, Kyushu University, Fukuoka 819 - 0395, Japan. text European Journal of Taxonomy 2020 2020-12-30 730 1 101 journal article 9069 10.5852/ejt.2020.730.1197 d640faf0-b3db-4fad-baaf-9eeaef7350e4 4418973 857A9432-9083-46B3-B0BF-B34D619EB350 Echinoderes ehlersi Zelinka, 1913 Table 5 Echinoderes ehlersi Zelinka, 1913: 419–424 , pl. 39, figs 6–9. Echinoderes ehlersi – Zelinka 1928: 237–240 , fig. 41. Non Echinoderes ehlersi – Higgins & Rao 1979: 79–82 , fig. 2. Description The species was collected and described from Zanzibar , Tanzania , at the African east coast. No type or topotype specimens were available for the present study. The species has not been collected since its description, hence, the present notes are a summary of taxonomically relevant information extracted from Zelinka (1913 , 1928 ). Small Echinoderes , with a trunk length of 228 µm , and lateral terminal spines reaching ¾ of trunk length. Very short middorsal spines present on segments 4 to 8, not even reaching the pectinate fringes of posterior segment margins, and lateroventral spines on segments 6 to 9. Tubes present in lateroventral positions on segments 2 and 5, and in laterodorsal positions on 10. The presence of glandular cell outlets type 2 in laterodorsal positions on segments 8 and/or 9 are not mentioned in the description, but they could possibly be present. Tergal extensions of segment are 11 short, pointed and well-spaced, and sternal extensions rounded, with ventrolateral seta-like tuft of extended fringe tips. Females with lateral terminal accessory spines. The presence of ventromedial female papillae is not mentioned in the description, but they could possibly be present in ventromedial or ventrolateral positions on some sternal plates.