List of bilaterian orders



List of bilateral animal orders contains the Bilateria of the animal subkingdom Eumetazoa, divided into four superphyla, Deuterostomia, and the three Protostome superphyla, Ecdysozoa, and the two Spiralia superphyla, Platyzoa and Lophotrochozoa.

Phylum Xenacoelomorpha

 * Subphylum Xenoturbelida
 * Class incertae sedis (Family Xenoturbellidae)
 * Subphylum Acoelomorpha
 * Class Acoela
 * Order incertae sedis (16 families)
 * Class Nemertodermatida
 * Order incertae sedis (2 families)

Phylum Hemichordata
No order, one genus, one species Planctosphaera pelagica
 * Class Enteropneusta (Acorn worms)
 * Order Enteropneusta
 * Class Graptolithina †
 * Order Camaroidea †
 * Order Crustoidea †
 * Order Dendroidea †
 * Order Dithecoidea †
 * Order Graptoloidea †
 * Order Stolonoidea †
 * Order Tuboidea †
 * Class Planctosphaeroidea
 * Class Pterobranchia
 * Order Cephalodiscida
 * Order Rhabdopleurida

Phylum Kinorhyncha
No class, 2 orders, called mud dragons, very common in mud or sand
 * Order Cyclorhagida
 * Order Homalorhagida

Phylum Loricifera
No class, one order Nanaloricida

Phylum Priapulida

 * Class Priapulimorpha
 * Order Priapulimorphida
 * Family Priapulidae
 * Family Tubiluchidae
 * Class Halicryptomorpha
 * Order Halicryptomorphida
 * Class Seticoronaria
 * Order Seticoronarida
 * Genus Maccabeus

Phylum Nematomorpha

 * Class Gordioidea
 * Class Nectonematoida

Phylum Lobopodia †

 * Class Xenusia
 * Order Archonychophora
 * Luolishaniidae
 * Luolishania
 * Miraluolishania
 * Paucipodiidae
 * Paucipodia
 * Order Protonychophora
 * Aysheaiidae
 * Aysheaia
 * Xenusiidae
 * Xenusion
 * Jianshanopodia
 * Hadranax
 * Siberion
 * Order Archonychophora
 * Luolishaniidae
 * Luolishania
 * Miraluolishania
 * Paucipodiidae
 * Paucipodia
 * Order Scleronychophora
 * Eoconchariidae
 * Microdictyon
 * Quadratapora
 * Fusuconcharium
 * Hallucigeniidae
 * Hallucigenia
 * Cardiodictyidae
 * Cardiodictyon
 * Order Paronychophora
 * Onychodictyidae
 * Onychodictyon
 * Order unassigned
 * Orstenotubulus
 * Carbotubulus
 * Mureropodia

Phylum Onychophora
No classes, no orders, families Peripatidae and Peripatopsidae

Phylum Tardigrada

 * Class Eutardigrada
 * Order Apochela
 * Family Milnesiidae
 * Order Parachela
 * Family Beornidae
 * Family Calohypsibiidae
 * Family Eohypsibiidae
 * Family Hypsibiidae
 * Family Macrobiotidae
 * Family Microhypsibiidae
 * Family Necopinatidae
 * Class Heterotardigrada
 * Order Arthrotardigrada
 * Family Archechiniscidae
 * Family Batillipedidae
 * Family Coronarctidae
 * Family Halechiniscidae
 * Family Renaudarctidae
 * Family Stygarctidae
 * Order Echiniscoidea
 * Family Echiniscidae
 * Family Echiniscoididae
 * Family Oreellidae

Phylum Gnathostomulida
No classes
 * Order Bursovaginoidea
 * Order Filospermoidea

Phylum Micrognathozoa
Some dispute here with Micrognathozoa as the class and Limnognathia as the order

Phylum Cycliophora

 * Class Eucycliophora
 * Order Symbiida
 * Family Symbiidae
 * Genus Symbion

Phylum Rotifera

 * Class Bdelloidea
 * Order Bdelloida
 * Class Monogononta
 * Order Collothecida
 * Order Flosculariida
 * Order Ploimida
 * Class Seisonidea
 * Order Seisonida

Phylum Acanthocephala

 * Class Archiacanthocephala
 * Order Apororhynchida
 * Order Gigantorhynchida
 * Order Moniliformida
 * Order Oligacanthorhynchida
 * Class Eoacanthocephala
 * Order Gyracanthocephala
 * Order Neoechinorhynchida
 * Class Palaeacanthocephala
 * Order Echinorhynchida
 * Order Polymorphida

Phylum Dicyemida
No classes, no orders, families Conocyemidae, Dicyemidae and Kantharellidae

Phylum Monoblastozoa
No classes, no orders, family Salinellidae

Phylum Orthonectida
No classes, no orders, families Pelmatosphaeridae and Rhopaluridae

Phylum Platyhelminthes



 * Class Rhabditophora
 * Subclass Macrostomorpha
 * Order Dolichomicrostomida
 * Subclass Trepaxonemata
 * Infraclass Neoophora
 * Parvclass Eulecithophora
 * Superorder Adiaphanida
 * Order Fecampiida
 * Order Prolecithophora
 * Order Tricladida
 * Order Rhabdocoela
 * Order Bothrioplanida
 * Order Lecithoepitheliata
 * Order Proseriata
 * Order Gnosonosemida
 * Order Polycladida
 * Order Prorhynchida
 * Subphylum Neodermata
 * Class Cestoda
 * Subclass Eucestoda
 * Order Bothriocephalidea
 * Order Caryophyllidea
 * Order Cathetocephalidea
 * Order Cyclophyllidea
 * Order Diphyllidea
 * Order Diphyllobothriidea
 * Order Haplobothriidea
 * Order Lecanicephalidea
 * Order Litobothriidea
 * Order Nippotaeniidea
 * Order Onchoproteocephalidea
 * Order Phyllobothriidea
 * Order Proteocephalidea
 * Order Pseudophyllidea
 * Order Rhinebothriidea
 * Order Spathebothriidea
 * Order Tetrabothriidea
 * Order Tetraphyllidea
 * Order Trypanorhyncha
 * Class Monogenea
 * Subclass Monopisthocotylea
 * Order Capsalidea
 * Order Dactylogyridea
 * Order Gyrodactylidea
 * Order Monocotylidea
 * Order Montchadskyellidea
 * Subclass Polyopisthocotylea
 * Order Chimaericolidea
 * Order Diclybothriidea
 * Order Mazocraeidea
 * Order Polystomatidea
 * Class Trematoda
 * Subclass Aspidogastrea
 * Order Aspidogastrida
 * Order Stichocotylida
 * Subclass Digenea
 * Order Diplostomida
 * Order Plagiorchiida

Phylum Gastrotricha
No classes
 * Order Chaetonotida
 * Order Macrodasyida

Kryptotrochozoa (unranked)
No classes, no orders, family Phoronidae No classes, no orders, families Barentsiidae, Loxokalypodidae, Loxosomatidae and Pedicellinidae
 * Phylum Nemertea
 * Class Anopla
 * Order Heteronemertea
 * Order Palaeonemertea
 * Class Enopla
 * Order Bdellonemertea
 * Order Hoplonemertea
 * Lophophorata (unranked)
 * Brachiozoa (unranked)
 * Phylum Hyolitha †
 * Order Hyolithida
 * Order Orthothecida
 * Phylum Brachiopoda
 * Class Lingulata
 * Order Lingulida
 * Order Discinida
 * Class Craniata/Craniforma
 * Order Craniida
 * Class Rhynchonellata
 * Order Terebratulida
 * Order Rhynchonellida
 * Phylum Phoronida
 * Bryozoa (unranked)
 * Phylum Ectoprocta
 * Class Gymnolaemata
 * Order Cheilostomata
 * Order Ctenostomatida
 * Class Phylactolaemata
 * Order Plumatellida
 * Class Stenolaemata
 * Order Cryptostomata †
 * Order Cryptostomida †
 * Order Cyclostomatida
 * Order Cystoporida †
 * Order Cystoporida †
 * Order Esthonioporata †
 * Order Fenestrida †
 * Order Hederellida †
 * Order Melicerititida †
 * Order Rhabdomesida †
 * Order Trepostomatida †
 * Phylum Entoprocta