Key to species of Myolaimus

1a Female body more than 1 mm ........................................................................... 2

1b Female body less than 1 mm ........................................................................... 3

2a Stoma three times longer than wide; male tail with papillae G1–G4 closely-grouped............................ rahmi

2b Stoma as long as wide; male tail with papillae GP1 visibly separated from the others........................ stammeri

3a Posterior stomatal chamber (behind the dorsal tooth) as big as the anterior one; larger amphid aperture, occupying one-third of the corresponding body diameter................................................................. amicitiae

3b Posterior stomatal chamber (behind the dorsal tooth) smaller than the anterior one or absent; smaller amphid aperture, occupy- ing one-fourth of the corresponding body diameter.......................................................... 4

4a Longer female tail (c’ = 7–10).......................................................................... 5

4b Shorter female tail (c’ = 2–6).......................................................................... 6

5a Dorsal tooth in stoma not prominent; shorter female rectum (1.5–2.0 times anal body diameter).................. indicus 5b Stoma with prominent dorsal tooth; longer female rectum (2.5–3.0 times anal body diameter)................... maupasi 6a Stoma with anterior stomatal chamber ca twice longer than wide; female tail very short, conoid (c’ = 2.0–2.5); male tail with