[1][3] This species has been placed by many authors in Onychogomphus but should be included in Lamelligomphus following Fraser (1934), based on the shape of the male anal appendages.

Anal appendages are black; but the outer and upper surfaces of the superiors are bright citron-yellow to nearly as far as the apices.

The posterior two-thirds straight and the apical third curling strongly downwards and then backwards, so that its dorsum comes into contact with the dorsal surface of the inferior appendage.

The inferior appendage is black, the branches curving at first downwards and then bent at a right angle and prolonged to overlap the superiors.

[4] This species prefers shady mountain streams, settling on rocks or twigs in mid-stream.