Concise hierarchy

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

Current position

†Eurypterida (Class) Burmeister, 1843

Ref: J.A. Dunlop et al., 2020: 16 [Dunlop & Lamsdell, 2017: table 1 (p 397)]. [inferred]

Alternative positions

†Eurypteridea (Class)	Ref: [Anonymous], 2007: 4 Oct 2007.
Merostomata (Subclass) Dana, 1852	Ref: R.C. Brusca & G.J. Brusca, 1990: 493.
Merostomata (Class) Dana, 1852	Ref: J.J. Sepkoski Jr., 2002: 169.

Historical positions

Chelicerata (Subphylum) Heymons, 1901	Ref: J.A. Dunlop et al., 2020: 17.
Euchelicerata ([unranked]) Weygoldt & Paulus, 1979	Ref: J.A. Dunlop et al., 2012: 16. [inferred rank]
Merostomata (Class) Dana, 1852	Ref: J.J. Sepkoski Jr., 2002: 169.
Merostomata (Subclass) Dana, 1852	Ref: R.C. Brusca & G.J. Brusca, 1990: 493.
Merostomata (Class) Dana, 1852	Ref: R.S. Boardman et al., 1987
Merostomata (Class) Dana, 1852	Ref: H.W. Levi, 1982: 72.

Number of Subtaxa

2024	Available in Systema Naturae 2000	†21f;73g;3s
1989-present	Systema Naturae 2000: 26 Dec 2020	[; †21f;73g]
2020	J.A. Dunlop et al.: 28	[; †21f;73g]
2012	J.A. Dunlop et al.: 16	†246s
2012	J.A. Dunlop et al.: 16	†246s