The genus was first described by Robert Brown in his Prodromus Florae Novae Hollandiae (1810), the type specimen for the genus was Cyrtostylis reniformis. It shares many morphological characteristics of another genus, Acianthus, by the same author, and various revisions by botanists have seen this genus included in that same generic boundary. Three species of Cyrtostylis are endemic to the Southwest Botanical Province of Australia;
- "Orchidaceae Cyrtostylis R.Br.". Plant Name Details. IPNI. 2004-01-20. Retrieved 2007-12-01.
- P. J. Kores; M. Molvray; S. P. Darwin (April–June 1993). "Morphometric Variation in Three Species of Cyrtostylis (Orchidaceae)". Systematic Botany, Vol. 18, No. 2. American Society of Plant Taxonomists. Retrieved 2007-12-01. "(Abstract) Character choice in the delimitation of Cyrtostylis oblonga, C. reniformis, and C. robusta..,"
- "ACIANTHUS; Mosquito Orchids". CSIRO. Retrieved 2007-12-01. "(Kores 1995) ... very broad generic approach, for example including Cyrtostylis within the generic boundaries of Acianthus despite an earlier study to the contrary (Jones and Clements 1987)."
- "Cyrtostylis". FloraBase. Department of Environment and Conservation, Government of Western Australia.
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