It has two leaves and a single narrow, pinkish green flower with a dark blackish red callus covering most of the upper surface of the labellum .

Most of the upper surface of the labellum is covered by a dark blackish red, insect-like callus of stalked and clusters of stalkless glands.

[2][3][4] Chiloglottis longiclavata was first formally described in 1991 by David Jones from a specimen collected in the Herberton Range and the description was published in Australian Orchid Research.

[1] The specific epithet (longiclavata) is derived from the Latin words longus meaning "long"[5]: 494  and clavus meaning "club" or "cudgel"[5]: 213  referring to the glandular tips on the sepals of this species.

[3] The northern wasp orchid grows in small colonies in tall forests and near rainforest margins on and between the Atherton Tableland and Eungella National Park.