Cobbia, De Man, 1907

Datta, Tridip Kumar, Bhowmik, Moumita & Choudhury, Amalesh, 2018, Cobbia bengalensis sp. nov. (Xyalidae: Monhysterida) from an eroding island of Sundarban, India, Zootaxa 4444 (2), pp. 179-188 : 187

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