It is distinguished from the other two similar blue orchids by the sides of the labellum which are erect but well-separated from the column.

[2][3][4] Cyanicula aperta was first formally described in 2000 Stephen Hopper and Andrew Brown in Australian Systematic Botany from a specimen collected near Jerramungup.

[5] The specific epithet (aperta) is a Latin word meaning "open", referring to the gap between the erect sides of the labellum and the column.

[3] The western tiny blue china orchid is found in areas near the south coast of Western Australia from the Cape Arid National Park to Dumbleyung in the Avon Wheatbelt, Coolgardie, Esperance Plains and Mallee bioregions of south-western Western Australia, growing in heath, in shrubland or on granite outcrops.

[2][3][4][6] Cyanicula aperta is classified as "not threatened" by the Western Australian Government Department of Parks and Wildlife.