Key for the Identification of Species of Lysilla found at Lizard Island

1. Body elongate and slender, of uniform width throughout; 5 pairs of notopodia, on segments 3–7..... Lysilla longilinea n. sp.

- Body distinctly swollen anteriorly and posteriorly, mid-body narrower and uniformly cylindrical; 9–13 pairs of notopodia, on segments 3 to 11–15........................................................................ Lysilla pacifica