Key to known males of the genus Olecryptotendipes in the world

1 Acrostichals absent, R bare.............................................................. O. secundus (Zorina)

- Acrostichals present, R with setae.........................................................................2

2 Anal point parallel-sided, thorax without dark brown spots.....................................................3

- Anal point not as above, thorax with dark brown spots........................................................4

3 Inferior volsella absent, antepronotals 2....................................................... O. lenzi (Zorina)

- Inferior volsella lobe-like, antepronotals 6–7............................................ O. exilis Yan, Wang & Bu

4 Legs without spots, superior volsella banana-like without projection....................... O. arienus Yan & Wang sp.n

- Legs with spots, superior volsella curved basally, straight distally, with large posterolateral projection................................................................................................ O. melasmus Yan, Wang & Bu