Concise hierarchy

(Kingdom) Animalia - (Phylum) Arthropoda - (Class) Insecta

Current position

Ephemeroptera (Division) Hyatt & Arms, 1890

Ref: R.W. Poole et al., 1997: 16.

Alternative positions

Hemimetabola (Division)	Ref: T.I. Storer et al., 1979: 588.
Insecta (Class) Linnaeus, 1758	Ref: Z.-Q. Zhang, 2013: 20.
Palaeoptera (Subclass) Martynov, 1923	Ref: R.S. Boardman et al., 1987
Palaeoptera (Infraclass) Martynov, 1923
Paleoptera (Infraclass)	Ref: R.C. Brusca & G.J. Brusca, 1990
Pterygota ([unranked]) Lang, 1888	Ref: D. Grimaldi & M.S. Engel, 2005: table 4.1.

Historical positions

Insecta (Class) Linnaeus, 1758	Ref: Z.-Q. Zhang, 2013: 20.
Insecta (Class) Linnaeus, 1758	Ref: Z.-Q. Zhang, 2011: 100.
Pterygota ([unranked]) Lang, 1888	Ref: D. Grimaldi & M.S. Engel, 2005: 160-166, table 4.1.
Ephemeroptera (Division) Hyatt & Arms, 1890	Ref: R.W. Poole et al., 1997: 16.
Exopterygota (Division) Sharp, 1899	Ref: M. Chinery, 1997
Paleoptera (Infraclass)	Ref: R.C. Brusca & G.J. Brusca, 1990
Palaeoptera (Subclass) Martynov, 1923	Ref: R.S. Boardman et al., 1987
Paleoptera (Infraclass)	Ref: G.F. Edmunds Jr., 1982: 330-331.
Insecta (Class) Linnaeus, 1758	Ref: L. Margulis & K.V. Schwartz, 1982: 226.
Hemimetabola (Division)	Ref: T.I. Storer et al., 1979: 588, fig. 25-20.
Ephemeria (Superorder)	Ref: B. Grzimek, 1973-1975

Number of Subtaxa

2024	Available in Systema Naturae 2000	28f;294g;838s;21ss; ‡2s; †19f;46g;65s
1989-present	Systema Naturae 2000	408g;2979s; †103g;196s
2003-present	J. Hallan: 21 Feb 2007	408g;2979s; †103g;196s
2013	Z.-Q. Zhang: 20	3,281*[3,124]s; †157s
2011	Z.-Q. Zhang: 100	3,240s
2000		2s; †1s
1990	R.C. Brusca & G.J. Brusca	~2,100s
1982	G.F. Edmunds Jr.	2so19f[227g]2100s
1979	T.I. Storer et al.	11f;1500s