Ricarte, A., Rotheray, G.E., Lyszkowski, R.M., Hancock, E.G., Hewitt, S.M., Watt, K.R., Horsfield, D. & Macgowan, I. (2014) The syrphids of Serra do Courel, Northern Spain and description of a new Cheilosia Meigen species (Diptera: Syrphidae). Zootaxa, 3793 (4), 401–422.