Brenthia cyanaula was described by Meyrick in 1912 (see reference to the original description below). The lectotype is deposited at the BMNH (see images).
Scratchpads developed and conceived by (alphabetical):
Ed Baker,
Katherine Bouton
Alice Heaton
Dimitris Koureas,
Laurence Livermore,
Dave Roberts,
Simon Rycroft,
Ben Scott,
Vince Smith