Michelsen, V. (2023) Macaronesian Muscidae (Diptera). IV. The genus Helina Robineau-Desvoidy, and description of the male of Spilogona maderensis Michelsen. Zootaxa, 5293 (2), 251–276.
https://doi.org/10.11646/zootaxa.5293.2.3