Concise hierarchy

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

Current position

Pantetrapulmonata ([unranked]) Shultz, 2007

Ref: J.W. Shultz, 2007: fig. 1.

Alternative positions

Arachnida (Class) Lamarck, 1801	Ref: Z.-Q. Zhang, 2013: 19.
Arachnina (Subclass)	Ref: J. Hallan, 2003-present: 7 Mar 2005.
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: 128.
Euchelicerata ([unranked]) Weygoldt & Paulus, 1979	Ref: C. Aria et al., 2020: fig. S4. [implicit]
Arachnida (Class) Lamarck, 1801	Ref: Z.-Q. Zhang, 2013: 19.
Pantetrapulmonata ([unranked]) Shultz, 2007	Ref: J.A. Dunlop et al., 2012: 117. [inferred rank]
Arachnida (Class) Lamarck, 1801	Ref: Z.-Q. Zhang, 2011: 99.
Micrura (Subclass)	Ref: D. Grimaldi & M.S. Engel, 2005: 101, table 3.2.
Arachnina (Subclass)	Ref: J. Hallan, [2003]: 7 Mar 2005.
Arachnida (Class) Lamarck, 1801	Ref: R.S. Boardman et al., 1987

Number of Subtaxa

2025	Available in Systema Naturae 2000	†9f;37g;2s
1989-present	Systema Naturae 2000: 24 Dec 2020	[; †9f;37g]
2020	J.A. Dunlop et al.: 132	[; †9f;37g]
2013	Z.-Q. Zhang: 19	†65s
2012	J.A. Dunlop et al.: 117	†65s
2012	J.A. Dunlop et al.: 117	†65s
2011	Z.-Q. Zhang: 99	†65s
[2003]	J. Hallan: 7 Mar 2005	†41g;71s
1987	R.S. Boardman et al.	†24g38s