Suggested Phylogenetic Classification of Invertebrate Animals
Guide to levels
subkingdom
phylogenetic groups above phylum
phylogenetic subgroups above phylum
Parazoa
(subkingdoms may soon be discarded)
-
Porifera
-
Demospongiae
-
Calcarea
-
Hexactinellida
Eumetazoa
Radiata
-
Ctenophora
-
Cnidaria
-
Anthozoa
-
Scyphozoa
-
Cubozoa
-
Hydrozoa (paraphyletic)
-
Placozoa (molecular phylogeny indicates that this is the sister
group of Cnidaria)
-
Myxozoa (some place these parasites in Cnidaria, others move the
phylum down to the Bilateria)
ON SEPARATE WEB PAGES:
Bilateria
Chaetognatha (bilateral phylum of uncertain affinities;
traditionally, a deuterostome, but recent work suggest it belongs nearer
Spiralia)
Gastrotricha (bilateral phylum of uncertain affinities,
shares features with both Spiralia and Ecdysozoa)
Spiralia
Ecdysozoa
Deuterostomia
Maintained by Sam Mozley (click
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Last modified on January 5, 2004