Concise hierarchy

(Kingdom) Animalia - (Phylum) Mollusca

Subsequent positions

Possibly †Procoelomata (Phylum) Bergström, 1989

Ref: J. Bergström, 1989: 266.

Current position

Mollusca (Phylum) Linnaeus, 1758

Ref: A.J. de Winter et al., 2010: 140.

Alternative positions

Aculifera (Subphylum) Hatschek, 1891	Ref: B. Grzimek, 1973-1975
Aplacophora ([unranked])	Ref: C. Nielsen, 1995
†Procoelomata (Phylum) Bergström, 1989	Ref: J. Bergström, 1989: 266. [new position]
Scutopoda (Subphylum)	Ref: R.C. van Caenegem et al., 1983

Historical positions

Mollusca (Phylum) Linnaeus, 1758	Ref: A.J. de Winter et al., 2010: 140.
Mollusca (Phylum) Linnaeus, 1758	Ref: W.F. Ponder & D.R. Lindberg, 2008: 8, 24-25, fig. 4.8.
Aplacophora (Class) von Ihering, 1876	Ref: A.H. Scheltema & C. Schander, 2000: 121. [invalid/synonym]
Mollusca (Phylum) Linnaeus, 1758	Ref: V.G. Millard, 1997: 3.
Aplacophora ([unranked])	Ref: C. Nielsen, 1995
Mollusca (Phylum) Linnaeus, 1758	Ref: R.C. Brusca & G.J. Brusca, 1990
†Procoelomata (Phylum) Bergström, 1989	Ref: J. Bergström, 1989: 266. [new position]
Scutopoda (Subphylum)	Ref: R.C. van Caenegem et al., 1983
Mollusca (Phylum) Linnaeus, 1758	Ref: K.J. Boss, 1982: 945, 948.
Aculifera (Subphylum) Hatschek, 1891	Ref: B. Grzimek, 1973-1975

Number of Subtaxa

2025	Available in Systema Naturae 2000	1o;3f;14g;112s
1989-present	Systema Naturae 2000	3f7g<70[64]s
2009-present	World Register of Marine Species (WoRMS): 14 Jan 2012	[1o;3f;14g]
2008	G. Haszprunar et al.: 24	~150s
2008	G. Haszprunar et al.: 24	~150s
1997	V.G. Millard: 3	[1o;3f;9g]
1990	R.C. Brusca & G.J. Brusca	~70s
1982	K.J. Boss: 948	3f7g<70[64]s