Kingdom Fungi R.T.Moore (1980) - fungi
Phylum Kickxellomycota Tedersoo, Sánchez-Ramírez, Kõljalg, Bahram, M. Döring, Schigel, T.W. May, M. Ryberg & Abarenkov (2018)
Class Harpellomycetes Tedersoo, Sánchez-Ramírez, Kõljalg, Bahram, M. Döring, Schigel, T.W. May, M. Ryberg & Abarenkov (2018) [monotypic]
Order Harpellales Lichtw. & Manier (1978)
Family Harpellaceae L. Léger & Duboscq ex P.M.Kirk & P.F. Cannon (2007)
1 Genus Carouxella Manier, Rioux & Whisler (1965)
2 Genus Harpella L. Léger & Duboscq (1929)
3 Genus Harpellomyces Lichtw. & S.T. Moss (1984)
4 Genus Klastostachys Lichtw., M.C. Williams & M.M. White (2011) [monotypic]
5 Genus Stachylina L. Léger & M. Gauthier (1932)
6 Genus Stachylinoides Lichtw. & López-Lastra (1999) [monotypic]