Concise hierarchy

(Kingdom) Animalia - (Phylum) Arthropoda

Subsequent positions

†Retifaciidae (Family) H. Xianguang & J. Bergström, 1997		Ref: X. Hou & J. Bergström, 1997: 52. [assumed]
†Trilobitomorpha (Superclass) Størmer, 1944		Ref: B. Mayers et al., 2019(2018)

Current position

†Trilobitomorpha (Superclass) Størmer, 1944

Ref: B. Mayers et al., 2019(2018) [new position]

Alternative positions

†Artiopoda (Subphylum) Hou & Bergström, 1997	Ref: R. Lerosey-Aubril et al., 2017: fig. 6.
†Merostomoidea (Class) Stormer, 1944	Ref: J.J. Sepkoski Jr., 2002 [rough position]
†Retifaciida (Order) Hou & Bergström, 1997	Ref: J. Bergström & X.-G. Hou, 2003: fig. 4. [rough position]
†Retifaciidae (Family) H. Xianguang & J. Bergström, 1997	Ref: X. Hou & J. Bergström, 1997: 52. [new position]

Historical positions

†Artiopoda ([unranked]) Hou & Bergström, 1997	Ref: J. Moysiuk & J.-B. Caron, 2019: fig. 4. [rough position]
†Trilobitomorpha (Superclass) Størmer, 1944	Ref: B. Mayers et al., 2019(2018) [new position]
†Artiopoda (Subphylum) Hou & Bergström, 1997	Ref: R. Lerosey-Aubril et al., 2017: fig. 6.
†Retifaciida ([unranked])	Ref: J.R. Paterson et al., 2010: text-fig. 9. [rough position]
Arachnomorpha ([unranked]) Heider, 1913	Ref: J.R. Hendricks & B.S. Lieberman, 2008: table 1, fig. 3.3. [rough position]
†Retifaciida (Order) Hou & Bergström, 1997	Ref: J. Bergström & X.-G. Hou, 2003: fig. 4. [rough position]

Number of Subtaxa

2025

Available in Systema Naturae 2000

†1s