Elzalia, Gerlach, 1957

Sun, Yan & Huang, Yong, 2017, One new species and one new combination of the family Xyalidae (Nematoda: Monhysterida) from the East China Sea, Zootaxa 4306 (3), pp. 401-410 : 405-406

Key to valid and the new species of Elzalia ; emended after Hope & Aryuthaka, 2009 and Zhang & Zhang, 2006

1 Body length longer than 860 µm..........................................................................2

- Body length shorter than 700 µm.........................................................................8

2 Spicules shorter than 80 µm....................................................................... E. kimae

- Spicules longer than 100 µm.............................................................................3

3 Distal end of spicules with two comb-like ridges.................................................. E. bipectinella

- Distal end of spicules tapered, without comb-like ridges.......................................................4

4 Spicules with a subterminal cluster of numerous tubercles.......................................... E. tuberculata

- Spicules without subterminal tubercles.....................................................................5

5 Spicules with serrated margin, gubernaculum with a series of projections..................................... E. poli

- Spicules without serrated margin, gubernaculum without lateral and dorsal projections...............................6

6 Body length greater than 1500 µm, ratio of body length to spicule length bigger than 10..................... E. gerlachi

- Body length less than 1100 µm, ratio of body length to spicule length smaller than 8.5...............................7

7 Gubernaculum consists of three sections, without leaf-like projection..................................... E. federici

- Gubernaculum consists of four sections, with leaf-like projection.......................................... E. floresi

8 Spicules distal end bifurcate............................................................. E. bifurcata sp. nov.

- Spicules distal end tapered..............................................................................9

9 Files of subcephalic setae present, gubernaculum consists of single section............................ E. mediterranea

- Files of subcephalic setae absent, gubernaculum consists of four sections.............................. E. striatitenuis