INVERTEBRATE ZOOLOGY - H. I. Shcherbak - 2008

KINGDOM MULTICELLULAR ANIMALS (METAZOA)

SUBKINGDOM TRUE MULTICELLULAR ANIMALS (EUMETAZOA)

SECTION TRIPOBLASTIC (TRIPLOBLASTICA) OR BILATERAL (BILATERIA) ANIMALS

SUBSECTION MOLTING ANIMALS (ECDYSOZOA)

PHYLUM ARTHROPODS (ARTHROPODA)

SUBPHYLUM CHELICERATES (CHELICERATA)

SUPERCLASS MEROSTOMATA (MEROSTOMATA)

A group of aquatic chelicerates that breathe using gills. They include two subclasses: extant horseshoe crabs (Xiphosura) and extinct Paleozoic eurypterids, or sea scorpions (Eurypterida), which are not covered here.



Last update: 13/08/2026

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