Hippa, H. & Vilkamaa, P., 2005. The genus Sciarotricha gen. n. (Sciaridae) and the phylogeny of Recent and fossil Sciaroidea (Diptera). Insect Systematics and Evolution, 36, pp.121-143. Available at: http://www.online-keys.net/sciaroidea/2000_/Hippa_&_Wilkimae_2005_sciarotricha_phylogeny_Sciaroidea.pdf.