List of animal classes
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Annelida (segmented worms)
- Polychaeta (bristle worms, paraphyletic with respect to Clitellata and Sipuncula)
- Clitellata (earthworms, leeches)
- Sipuncula (peanut worms)
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Arthropoda (insects, crustaceans, arachnids, centipedes and others)
Chelicerata
Source:
- Arachnida (spiders, scorpions, and kin)
- Merostomata (horseshoe crabs)
- Pycnogonida (sea spiders)
Myriapoda
Source:
Pancrustacea
Source:
- Ostracoda (seed shrimp)
- Mystacocarida
- Ichthyostraca (tongue worms and fish lice)
- Copepoda
- Malacostraca (crabs, lobsters, crayfish, krill, various shrimp, woodlice, and kin)
- Tantulocarida
- Thecostraca (barnacles)
- Cephalocarida (horseshoe shrimp)
- Branchiopoda (fairy shrimp, tadpole shrimp, water fleas, and clam shrimp)
- Remipedia
Hexapoda
Source:
- Entognatha (coneheads, two-pronged bristletails and springtails. paraphyletic with respect to insects)
- Insecta (insects)
Brachiopoda (lamp shells)
- Lingulata
- Craniata
- Rhynchonellata
Bryozoa (moss animals)
- Gymnolaemata
- Phylactolaemata
- Stenolaemata
Chaetognatha (arrow worms)
Chordata (vertebrates, tunicates, and lancelets)
Cephalochordata
- Leptocardii (lancelet)
Tunicata
- Appendicularia (larvaceans)
- Ascidiacea (sea squirts, paraphyletic with respect to Thaliacea)
- Thaliacea (salps, pyrosomes, and doliolids)
Vertebrata
Cyclostomata (jawless fish)
- Myxini (hagfish)
- Petromyzontida (lamprey)
Gnathostomata (jawed vertebrates)
- Chondrichthyes (cartilaginous fish: chimeras, sharks and rays)
- Osteichthyes
- Actinopterygii (ray-finned fish, which includes most familiar bony fish)
- Sarcopterygii
Cnidaria (marine stinging animals)
Anthozoa (corals and sea anemones)
Medusozoa (jellyfish and hydrozoans)
Endocnidozoa (marine parasites)
Ctenophora (comb jellies)
- Tentaculata
- Nuda (beroids)
Cycliophora (tiny marine animals)
Dicyemida (rhombozoa)
- Rhombozoa
Echinodermata (sea stars, sea urchins, sand dollars, sea lilies, and others)
Crinozoa
- Crinoidea (sea lilies and feather stars)
Asterozoa
- Asteroidea (sea star)
- Ophiuroidea (brittle stars)
Echinozoa
- Echinoidea (sea urchins)
- Holothuroidea (sea cucumbers)
Hemichordata
- Enteropneusta (acorn worms)
- Pterobranchia
- Planctosphaeroidea
Kinorhyncha (mud dragons)
- Allomalorhagida
- Cyclorhagida
Mollusca (mollusks)
- Solenogastres
- Caudofoveata
- Bivalvia (clams, cockles, mussels, oysters and scallops)
- Cephalopoda (octopuses, squids, cuttlefish and nautiluses)
- Gastropoda (snails and slugs)
- Monoplacophora
- Polyplacophora (chitons, or sea cradles)
- Scaphopoda (tusk shells)
Nematoda (roundworms)
Nematomorpha (horsehair worms)
- Gordioida
- Nectonematoida
Nemertea (ribbon worms)
- Hoplonemertea
- Palaeonemertea
- Pilidiophora
Placozoa
- Polyplacotomia
- Uniplacotomia
Platyhelminthes (flatworms)
- Catenulida
- Turbellaria (e.g. Dugesia, paraphyletic with respect to Neodermata)
Neodermata (parasitic worms)
Porifera (sponges)
- Calcarea (calcareous sponges)
- Demospongiae
- Hexactinellida (glass sponges)
- Homoscleromorpha
Priapulida (priapulid worms)
- Halicryptomorpha
- Priapulimorpha
- Seticoronaria
Rotifera (rotifers)
- Bdelloidea
- Monogononta
- Seisonidea
Acanthocephala (thorny-headed worms)
Source:
- Archiacanthocephala
- Eoacanthocephala
- Palaeacanthocephala (ancient thornheads)
- Polyacanthocephala
Tardigrada (tardigrades, water bears, or moss piglets)
- Eutardigrada
- Heterotardigrada
Xenacoelomorpha
Acoelomorpha (simple soft-bodied flat worms)
- Acoela
- Nemertodermatida
More in Biology
GenusTaxonomic rank above species and below familyFamily (taxonomy)Taxonomic rank between genus and orderEndemismState of species being unique to a locationCladeGroup of a common ancestor and all of their descendantsGenomeAll genetic material of an organismOrder (taxonomy)Taxonomic rank between class and family