The following is a list of the classes in each phylum of the kingdom Animalia. There are 107 classes of animals in 33 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.
Unknown phylum
- Micrognathozoa
Acanthocephala (thorny-headed worms)
- Archiacanthocephala
- Eoacanthocephala
- Palaeacanthocephala (ancient thornheads)
Acoelomorpha (simple soft-bodied flatworms)
- Acoela
- Nemertodermatida
Annelida (segmented worms)
- Aelosomata[1]
- Clitellata (earthworms)
- Myzostomida
- Polychaeta (bristle worms)
- Echiura (spoon worms)
- Sipuncula (peanut worms)
Arthropoda (arthropods: insects, crustaceans, arachnids, centipedes, and millipedes)
Chelicerata[2]
- Arachnida (spiders, scorpions, and kin)
- Xiphosura (horseshoe crabs; only 4 extant species)
- Pycnogonida (sea spiders)
Crustacea[3]
- Branchiopoda (fairy shrimp, tadpole shrimp, water fleas, and clam shrimp)[4]
- Cephalocarida (horseshoe shrimp; only 12 described species)[5]
- Malacostraca (crabs, lobsters, crayfish, krill, various shrimp, woodlice, and kin)f[6]
- Maxillopoda (barnacles, copepods, fish lice, and other groups)[7]
- Ostracoda (seed shrimp)[8]
- Remipedia
Hexapoda[9]
- Entognatha (coneheads, two-pronged bristletails and springtails)
- Insecta (insects)
Myriapoda[10]
Brachiopoda ("lamp shells")
- Craniforma
- Rhynchonellata
Bryozoa (moss animals)
- Gymnolaemata
- Phylactolaemata
- Stenolaemata
Chaetognatha (arrow worms)
- Archisagittoidea
- Sagittoidea
Chordata (vertebrates, tunicates, and lancelets)
Cephalochordata
- Leptocardii (lancelet)
Tunicata
- Appendicularia (larvaceans)
- Ascidiacea (sea squirts)
- Sorberacea
- Thaliacea (salps, pyrosomes, and doliolids)
Vertebrata
Agnatha
Cyclostomata
- Myxini (hagfish)
- Petromyzontida (lamprey)
Gnathostomata
- Chondrichthyes (cartilaginous fish, mostly sharks and rays)
Osteichthyes
- Actinopterygii (ray-finned fish, which includes most familiar bony fish)
- Sarcopterygii (lobe-finned fish)
Tetrapoda
Cnidaria (marine stinging animals)
- Anthozoa (anemones and corals)
- Cubozoa (box jellyfish)
- Hydrozoa (hydroids)
- Malacosporea (marine parasites)
- Myxosporea (marine parasites)
- Scyphozoa (true jellyfish)
- Staurozoa (stalked jellyfish)
- Polypodiozoa (marine parasites)
Cycliophora (tiny marine animals)
Dicyemida (rhombozoa)
- Dicyemida
Echinodermata (starfish, sea urchins, sand dollars, sea lilies, and others)
Crinozoa
- Crinoidea (sea lilies and feather stars)
Asterozoa
- Asteroidea (star fish)
- Ophiuroidea (brittle stars)
Echinozoa
- Echinoidea (sea urchins)
- Holothuroidea (sea cucumbers)
Entoprocta
Gastrotricha (hairybacks)
Gnathostomulida (jaw worms)
- Gnathostomulida
Hemichordata
- Enteropneusta (acorn worms)
- Pterobranchia
Kinorhyncha (mud dragons)
Loricifera
Mollusca (mollusks)
- Bivalvia (clams, mussels, scallops, and kin)
- Caudofoveata
- Cephalopoda (octopuses, squids and cuttlefish)
- Gastropoda (snails and slugs)
- Monoplacophora
- Polyplacophora (chitons, or sea cradles)
- Scaphopoda (tusk shells)
- Solenogastres
Nematoda (roundworms)
- Adenophorea
- Chromadorea
- Secernentea
Nematomorpha (horsehair worms)
- Gordioidea
- Nectonematoida
Nemertea (ribbon worms)
Onychophora (velvet worms)
- Udeonychophora
Orthonectida
Placozoa
- Trichoplacoidea
Platyhelminthes (flatworms)
- Cestoda (tapeworms and relatives)
- Monogenea
- Trematoda (flukes)
- Turbellaria (e.g. Dugesia)
Porifera (sponges)
- Calcarea (calcareous sponges)
- Demospongiae
- Hexactinellida (glass sponges)
- Homoscleromorpha
Priapulida (priapulid worms)
- Halicryptomorpha
- Priapulimorpha
- Seticoronaria
Rotifera (rotifers)
- Bdelloidea
- Monogononta
- Seisonidea
Tardigrada (tardigrades, water bears, or moss piglets)
- Eutardigrada
- Heterotardigrada
Xenoturbellida
- Xenoturbellida
References
- ^ Ramel, Gordon. "The Annelids (Phylum Annelida)". www.earthlife.net.
- ^ Integrated Taxonomic Information System. "ITIS Standard Report Page: Chelicerata". www.itis.gov.
- ^ Integrated Taxonomic Information System. "ITIS Standard Report Page: Crustacea". www.itis.gov.
- ^ Regents of the University of California. "Introduction to Brachiopoda". www.ucmp.berkeley.edu.
- ^ "Archived copy" (PDF). Archived from the original (PDF) on 2014-10-06. Retrieved 2014-10-03.
- ^ Conlan, Kathleen E.; Bousfield, Edward. "Malacostracan | crustacean". www.britannica.com.
- ^ http://atiniui.nhm.org/pdfs/3839/3839.pdf
- ^ http://atiniui.nhm.org/pdfs/3839/3839.pdf
- ^ "ITIS Standard Report Page: Hexapoda". www.itis.gov. Integrated Taxonomic Information System.
- ^ "ITIS Standard Report Page: Myriapoda". www.itis.gov. Integrated Taxonomic Information System.