A New Species of Free-living Marine Nematode, Proplatycoma tsukubae sp. nov. (Enoplida: Leptosomatidae), from Japan Author Shimada, Daisuke Department of Biological Sciences, Faculty of Science, Hokkaido University, N 10 W 8, Sapporo, Hokkaido 060 - 0810, Japan E-mail: oncholaimus @ gmail. com & Previous address: Department of Biology, Keio University, 4 - 1 - 1 Hiyoshi, Yokohama, Kanagawa 223 - 8521, Japan & Corresponding author oncholaimus@gmail.com Author Kakui, Keiichi Department of Biological Sciences, Faculty of Science, Hokkaido University, N 10 W 8, Sapporo, Hokkaido 060 - 0810, Japan E-mail: oncholaimus @ gmail. com oncholaimus@gmail.com text Species Diversity 2020 2020-09-18 25 205 211 journal article 10.12782/specdiv.25.205 2189-7301 5738672 CB9EA47A-BF49-4668-9B57-B1F75AC16C81 Key to species of Proplatycoma 1. Amphidial flaps trilobed.......................... 2 — Amphidial flaps unilobed......................... 4 2. Dorsal and ventral lobes on amphidial flaps with a number of branches....................... P. curiosa — Lobes on amphidial flaps without branches.......... 3 3. Proximal end of spicule accessory structure with a knob-like head....................... P. sudafricana — Proximal end of spicule accessory structure tapering........................................ P. fleurdelis 4. Amphidial flap tip much anterior to edge of aperture......................................... P. africana — Amphidial flap tip around anterior to edge of aperture............................... P. tsukubae sp. nov.