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 genera of Platycominae 1. Amphidial aperture with two flat setae on its posterior edge in males........................... Platycoma — Amphidial aperture with no setae on its posterior edge ............................................... 2 2. Amphidial aperture with a flap on its posterior edge in males............................... Proplatycoma — Amphidial aperture without a flap................. 3 3. Gubernaculum with dorsal apophyses, precloacal ventromedian supplements tubular..... Pseudoplatycoma — Gubernaculum without apophyses, precloacal ventromedian supplements papilliform........ Platycomopsis