Cobbia bengalensis sp. nov. (Xyalidae: Monhysterida) from an eroding island of Sundarban, India Author Datta, Tridip Kumar Author Bhowmik, Moumita Author Choudhury, Amalesh text Zootaxa 2018 2018-07-09 4444 2 179 188 journal article 29710 10.11646/zootaxa.4444.2.6 4c6c0867-c2bf-4e04-b108-9c4d62953bd1 1175-5326 1309608 5EEA178A-60E9-4356-A3D8-8705B59344D3 Key to valid species of Cobbia Key was primarily followed after Wieser (1959) and Lo Russo & Pastor de Ward (2012) . 1. Tail elongated flagelliform.............................................................................. 2 - Tail non-flagelliform................................................................................... 4 2. Buccal cavity with three subequal teeth located at the same height; anterior sensilla arrangement 6+10.................................................................................................. C. triodonta Filipjev, 1918 - Buccal cavity with three unequal teeth located at different height; anterior sensilla arrangement 6+12................... 3 3. Longest anterior sensilla>2 (2.3–2.5) times of head diameter; distance of amphid from the anterior end is 3.8–4 times of amphid diameter............................................................. C. trefusiaeformis de Man, 1907 - Longest anterior sensilla <2 (1.3) times of head diameter; distance of amphid from the anterior end is <3 times of amphid diameter.......................................................................... C. urinator Wieser, 1959 4. Anterior sensilla arrangement 6+10....................................................................... 5 - Anterior sensilla arrangement 6+12....................................................................... 8 5. Amphid located>30 µm from the anterior end................................... C. caledonia Warwick & Platt, 1973 - Amphid located <30 µm from the anterior end.............................................................. 6 6. Subterminal setae adjacent to tail terminus present........................................................... 7 - Subterminal setae adjacent to tail terminus absent.......................................... C. bengalensis sp. nov. 7. Male and female tail conico-cylindrical and of similar length; cephalic sensilla <1.5 of head diameter.............................................................................................. C. sinica Huang & Zhang, 2010 - Male tail conical, female tail conico-cylindrical and longer than male; cephalic sensilla>2 of head diameter................................................................................................ C. dentata Gerlach, 1953 8. Gubernaculum with dorsal apophysis................................................... C. truncata Wieser, 1959 - Gubernaculum without apophysis................................ C. macrodentata Lo Russo & Pastor de Ward, 2012