INVERTEBRATE ZOOLOGY - H. I. Shcherbak - 2008

KINGDOM MULTICELLULAR ANIMALS (METAZOA)

SUBKINGDOM TRUE MULTICELLULAR ANIMALS (EUMETAZOA)

DIVISION TRIPLOBLASTIC (TRIPLOBLASTICA) OR BILATERAL (BILATERIA) ANIMALS

SUBDIVISION ARROW WORMS (CHAETOGNATHA)

This subdivision comprises a single phylum, Arrow Worms (Chaetognatha), which cannot be assigned to any of the currently existing higher-level taxa.



Last update: 13/08/2026

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