Concise hierarchy

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

Current position

Micrura ([unranked]) Hansen & Sørensen, 1904

Ref: D. Grimaldi & M.S. Engel, 2005: table 3.2 [Aria et al., 2020: fig. S4]. [implicit]

Alternative positions

Arachnida (Class) Lamarck, 1801	Ref: Z.-Q. Zhang, 2013: 18.
Arachnida (Subclass) Lamarck	Ref: R.C. Brusca & G.J. Brusca, 1990: 495.
Arachnina (Subclass)	Ref: J. Hallan, 2003-present: 7 Mar 2005.
Megoperculata ([unranked]) Börner, 1902	Ref: J.A. Coddington et al., 2004: fig. 18.1.
Micrura (Subclass)	Ref: D. Grimaldi & M.S. Engel, 2005: table 3.2.

Historical positions

Chelicerata (Subphylum) Heymons, 1901	Ref: J.A. Dunlop et al., 2020: 61.
Euchelicerata ([unranked]) Weygoldt & Paulus, 1979	Ref: C. Aria et al., 2020: fig. S4. [implicit]
N.N. (Superorder)	Ref: M.A. Ruggiero et al., 2015b: 36.
Arachnida (Class) Lamarck, 1801	Ref: Z.-Q. Zhang, 2013: 18.
Arachnida (Class) Lamarck, 1801	Ref: J.A. Dunlop et al., 2012: 56. [inferred rank]
Arachnida (Class) Lamarck, 1801	Ref: Z.-Q. Zhang, 2011: 99; Prendini, 2011: 121.
Arachnida (Class) Lamarck, 1801	Ref: E.J. van Nieukerken, 2010: 159.
Micrura (Subclass)	Ref: D. Grimaldi & M.S. Engel, 2005: 104, table 3.2.
Megoperculata ([unranked]) Börner, 1902	Ref: J.A. Coddington et al., 2004: 302, fig. 18.1.
Arachnida (Class) Lamarck, 1801	Ref: M.S. Harvey, 2003: ix, x, 149-174.
Arachnina (Subclass)	Ref: J. Hallan, [2003]: 7 Mar 2005.
Arachnida (Subclass) Lamarck	Ref: R.C. Brusca & G.J. Brusca, 1990: 495.
Arachnida (Class) Lamarck, 1801	Ref: H.W. Levi, 1982: 77, pl.94.
Arachnida (Class) Lamarck, 1801	Ref: B. Grzimek, 1973-1975

Number of Subtaxa

2024	Available in Systema Naturae 2000	2f;6g;5s;2ss; †2g
1989-present	Systema Naturae 2000: 24 Dec 2020	[2f;6g; †2g]
2020	J.A. Dunlop et al.: 61	[2f; †2g]
2013	Z.-Q. Zhang: 18	88*[87]s; †1s
2012	J.A. Dunlop et al.: 56 (Harvey, 2003)	78s; †1s
2012	J.A. Dunlop et al.: 56	78s; †1s
2011	Z.-Q. Zhang: 99	83*[82]s; †1s
2011	L. Prendini: 121 (incl. footnote 1)	1Sf;2f;6g;82s; †1g;1s
2010	E.J. van Nieukerken: 159	82s
2010	E.J. van Nieukerken: 159	82s
2004	J.A. Coddington et al.: 302	2f;6g;78s
2004	J.A. Coddington et al.: 302	2f;6g;78s
2003	M.S. Harvey: x	2f;6g;78s
[2003]	J. Hallan: 7 Mar 2005	6g;79s; †2g;2s
2003	M.S. Harvey: x	2f;6g;78s
[2003]	J. Hallan: 7 Mar 2005	6g;79s; †2g;2s
1990	R.C. Brusca & G.J. Brusca	~60s
1982	H.W. Levi	1f5g60s