Concise hierarchy

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

Current position

Neohydrachnidia ([unranked]) Witte & Olomski, 1991

Ref: M. Dabert et al., 2016: 88.

Alternative positions

Anystina (Infraorder) van der Hammen, 1972	Ref: O. Bánki et al., 2023: 17 Aug 2023.
Hydrachnidia ([unranked]) Krantz, 1978	Ref: H. Smit, 2020: 283.
Hydrachnidiae (Subcohort)	Ref: G.W. Krantz & D.E. Walter, 2009: 99.
Parasitengona (Hyporder) Oudemans, 1909	Ref: Z.-Q. Zhang et al., 2011: 132.
Parasitengona (Cohort) Oudemans, 1909	Ref: J. Kethley, 1982: 133.
Parasitengona (Suborder) Oudemans, 1909	Ref: J. Hallan, [2003]: 02 Sep 2005.

Historical positions

Hydrachnidia ([unranked]) Krantz, 1978	Ref: H. Smit, 2020: 15, 283.
Parasitengona (Hyporder) Oudemans, 1909	Ref: Z.-Q. Zhang et al., 2011: 132.
Hydrachnidiae (Subcohort)	Ref: G.W. Krantz & D.E. Walter, 2009: 99.
Parasitengona (Cohort) Oudemans, 1909	Ref: J. Kethley, 1982: 133.

Number of Subtaxa

2025	Available in Systema Naturae 2000	12f;234g;116s;1ss
1989-present	Systema Naturae 2000: 20 Oct 2023	[12f;234g]
2020	H. Smit: 22	[12f;234g]
2011	Z.-Q. Zhang et al.: 132	13f
1982	J. Kethley: 133	11f[>152g]