List of animal classes

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The following is a list of the classes in each phylum of the kingdom Animalia. There are 108 classes of animals in 34 phyla in this list. However, different sources give different numbers of classes and phyla. For example, Protura, Diplura, and Collembola are often considered to be the three orders in the class Entognatha. This list should by no means be considered complete and authoritative and should be used carefully.

Incertae sedis[edit]

Acanthocephala (thorny-headed worms)[edit]

Acoelomorpha (simple soft-bodied flatworms)[edit]

Annelida (segmented worms)[edit]

Arthropoda (arthropods: insects, crustaceans, arachnids, centipedes, and millipedes)[edit]

Chelicerata[2][edit]

Crustacea[3][edit]

Hexapoda[9][edit]

Myriapoda[10][edit]

Brachiopoda (brachiopods aka lamp shells)[edit]

Bryozoa (moss animals)[edit]

Chaetognatha (arrow worms)[edit]

Chordata (vertebrates, tunicates, and lancelets)[edit]

Cephalochordata[edit]

Tunicata[edit]

Vertebrata[edit]

Agnatha[edit]

Cyclostomata[edit]

Gnathostomata[edit]

Tetrapoda[edit]
Osteichthyes[edit]

Cnidaria (jellyfish, corals, anemones, and others)[edit]

Cycliophora (tiny marine animals)[edit]

Dicyemida (rhombozoan mesozoans)[edit]

  • Dicyemida

Echinodermata (starfish, sea urchins, sand dollars, sea lilies, and others)[edit]

Crinozoa[edit]

Asterozoa[edit]

Echinozoa[edit]

Entoprocta[edit]

  • Entoprocta

Gastrotricha[edit]

  • Gastrotricha

Gnathostomulida[edit]

  • Gnathostomulida

Hemichordata[edit]

Kinorhyncha[edit]

Loricifera[edit]

Mollusca[edit]

Nematoda[edit]

Nematomorpha[edit]

Nemertea[edit]

Onychophora (velvet worms)[edit]

Orthonectida[edit]

Placozoa[edit]

Platyhelminthes (flatworms)[edit]

Porifera (sponges)[edit]

Priapulida[edit]

Rotifera (rotifers)[edit]

Sipuncula (peanut worms)[edit]

Tardigrada (tardigrades, water bears, or moss piglets)[edit]

Xenoturbellida[edit]

References[edit]