Paramononchus

Gagarin, Vladimir G. & Naumova, Tatyana V., 2016, Ethmolaimus riparius sp. n. and Paramononchus major sp. n. (Nematoda) from Lake Baikal, Russia, Zootaxa 4098 (3), pp. 582-592 : 591

Key to species of Paramononchus

1. Body over 5 mm long....................................................................... P. major sp. n.

- Body less than 5 mm long............................................................................... 2

2. Body over 3 mm long.................................................................................. 3

- Body less than 3 mm long...............................................................................4

3. Stoma 64– 68 x30–32 µm in size; spicules 208–238 µm long........................................... P. orientalis

- Stoma 44– 48 x19–21 µm in size; spicules 70 µm long.................................................. P. arcticus

4. Body 1.6 mm long, c = 5.5.................................................................. P. thiocrenobius

- Body longer than 1.6 mm; c more than 5.5.................................................................. 5

5. L = 2.5–2.9 mm; a = 32–40; stoma 42– 46 x15 µm in size............................................... P. alimovi

- L = 1.73–2.17 mm; a = 21–28; stoma 55– 67 x20–25 µm............................................ P. baikalensis