Entity:

Concise hierarchy

Subsequent positions

Ref: J. Bergström, 1989: 266.

Annelida (Phylum) Lamarck, 1809

Ref: J.J. Sepkoski Jr., 2002 [indirect]

†*Problematica* (Phylum) Andrews, 1970	Ref: J.J. Sepkoski Jr., 2002: 72.
†*Procoelomata* (Phylum) Bergström, 1989	Ref: J. Bergström, 1989: 266. [new position]

†*Problematica* (Phylum) Andrews, 1970	Ref: J.J. Sepkoski Jr., 2002: 72.
†*Procoelomata* (Phylum) Bergström, 1989	Ref: J. Bergström, 1989: 266. [new position]

2026	Available in Systema Naturae 2000	†2o;12g
2002	J.J. Sepkoski Jr.: 72	[; †3o;15g]
1989	J. Bergström: 266	[; †4o;10f]