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Stem group:
Phylum †
Procoelomata
Bergström, 1989
(invertebrate)
Taxa
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Entity:
[Bilateria] ([unranked]) - bilaterians
..[Acoelomata]
..[Acoelomorpha] ([unranked])
..[bryozoans]
..[Coelomata]
..[Deuterostomia] (Superphylum) - deuterostomes
..[Dicyemida] (Phylum) - dicyemids
..[ecdysozoans]
..[Eubilateria]
..[flatworms]
..[lophotrochozoans]
..[Mesozoa] (Phylum)
..[Protornaeozoa]
..[Pseudocoelomata]
..[Xenacoelomorpha] ([unranked])
..[†Procoelomata] (Phylum)
Authorship
SN2000 author citation
:
J. Bergström, 1989
Original name
:
Bergström, J. 1989.
Lethaia
22
(3)
: 265. ("nov. phylum").
Original rank
:
op. cit.: 265.
Original spelling
:
loc. cit.
Description/Diagnosis in English
:
loc. cit.
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Last updated:
28 Aug 2026