List of bilateral animal 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 = Insert non-formatted text here
 * Subphylum Xenoturbella
 * Class incertae sedis (Family Xenoturbellidae)
 * Subphylum Acoelomorpha
 * Class Acoela
 * Order incertae sedis (16 families)
 * Class Nemertodermatida
 * Order incertae sedis (2 families)

= Mesozoa (unranked) =

Phylum Monoblastozoa

 * Class incertae sedis (1 species: Salinella salve)

Phylum Orthonectida

 * Class incertae sedis (2 families)

=Nephrozoa (unranked)=

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 Dinocaridida †
 * Kerygmacheloidea
 * Kerygmachela
 * Pambdulurion
 * Anomalocaromorpha
 * Parapeytoia
 * Anomalocaria
 * Opabiniidae
 * Opabinia
 * Myoscolex
 * Anomalocarida
 * Pennsylvaniocaris
 * Piococaris
 * Sarocaris
 * Paranomalocaris]]
 * Anomalocarididae
 * Class Xenusia †


 * Order Archonychophora
 * Archonychophora Hou & Bergstrom, 1995 - Undifferentiated appendages; each segment the same as each other. See
 * Luolishaniidae Hou & Bergstrom, 1995 - three small rounded sclerites per segment - these are thorn-shaped spines.
 * Luolishania Hou & Chen 1989
 * Miraluolishania Liu & Shu 2004
 * Paucipodiidae Hou et al., 2004 - with no dorsal sclerites, two claws, fine annulation and few segments.
 * Paucipodia Hou et al. 2004

These taxa are only known from the Chengjiang (Cambrian Stage 2 Series 3).


 * Order Protonychophora
 * Protonychophora Hutchinson, 1930 - Spiny legs, reduced tail
 * Aysheaiidae Walcott, 1911 - many claws on each leg. Anterior grasping appendages with long spines.
 * Aysheaia Walcott 1911
 * Xenusiidae Dzik & Krumbiegel, 1989 - >20 leg-bearing segments; paired, rounded sclerites on each segment; spiny legs.
 * Xenusion Pompeckj, 1927
 * Jianshanopodia Liu et al. - from Chengjiang; two rows of tubercles but no obvious sclerites
 * Hadranax Budd & Peel 1998 — from the Sirius Passet. Lacks obvious dorsal armature, but bears four 'nodes' per row.
 * Order Scleronychophora
 * Scleronychophora Hou & Bergstrom, 1995 - paired sclerites; elongated head sclerites
 * Eoconchariidae Hou & Shu, 1987 - ~10 leg-bearing segments, small head, sieve-like sclerites, varying in shape along body; curved claws on annulated legs; terminal mouth and anus.
 * Microdictyon Bengtson et al.
 * Quadratapora Hao and Shu, 1987
 * Fusuconcharium Hao and Shu, 1987
 * Hallucigeniidae Conway Morris, 1977 - ~10 leg-bearing segments; large sclerites covering head; sclerites on each segment are long spines.
 * Hallucigenia Conway Morris 1977 - From the Chengjiang, Kaili and Burgess Shale
 * Cardiodictyidae Hou & Bergstrom, 1995 - many segments (~23); large sclerites cover head; hexagonal sclerite on each body segment.
 * Cardiodictyon Hou et al. 1991 - Known from the Chengjiang
 * Order Paronychophora
 * Paronychophora Hou & Bergstrom, 1995 - short, downwards facing head; papillae on body and legs, some arranged in rows; shield-like sclerites on head; dorsal armature of spines; claw-like jaws; annulated legs [ Note - diagnosis modified in ]
 * Onychodictyidae Hou & Bergstrom, 1995
 * Onychodictyon Hou et al. 1991
 * Order unassigned
 * Orstenotubulus Maas et al. 2007 from the Furongian Orsten deposits - with retractable dorsal spines
 * Carbotubulus Haug et al. 2012 - from the Mazon creek. Dorwal armature uncertain.  Few segments, long limbs.
 * Mureropodia, from the Stage 2 Murero lagerstatten, Spain


 * Class Siberion †
 * Family Xenusiidae †
 * Genus Siberion †
 * Class Hadranax †
 * Order 	Protonychophora †
 * Family Xenusiidae †
 * Genus Hadranax †
 * Order Archonychophora Hou & Bergstrom, 1995 - Undifferentiated appendages; each segment the same as each other. See
 * Luolishaniidae Hou & Bergstrom, 1995 - three small rounded sclerites per segment - these are thorn-shaped spines.
 * Luolishania Hou & Chen 1989
 * Miraluolishania Liu & Shu 2004
 * Paucipodiidae Hou et al., 2004 - with no dorsal sclerites, two claws, fine annulation and few segments.
 * Paucipodia Hou et al. 2004
 * Order Protonychophora Hutchinson, 1930 - Spiny legs, reduced tail
 * Order Scleronychophora Hou & Bergstrom, 1995 - paired sclerites; elongated head sclerites
 * Eoconchariidae Hou & Shu, 1987 - ~10 leg-bearing segments, small head, sieve-like sclerites, varying in shape along body; curved claws on annulated legs; terminal mouth and anus.
 * Microdictyon Bengtson et al.
 * Quadratapora Hao and Shu, 1987
 * Fusuconcharium Hao and Shu, 1987
 * Hallucigeniidae Conway Morris, 1977 - ~10 leg-bearing segments; large sclerites covering head; sclerites on each segment are long spines.
 * Hallucigenia Conway Morris 1977 - From the Chengjiang, Kaili and Burgess Shale
 * Cardiodictyidae Hou & Bergstrom, 1995 - many segments (~23); large sclerites cover head; hexagonal sclerite on each body segment.
 * Cardiodictyon Hou et al. 1991 - Known from the Chengjiang
 * Order Paronychophora Hou & Bergstrom, 1995 - short, downwards facing head; papillae on body and legs, some arranged in rows; shield-like sclerites on head; dorsal armature of spines; claw-like jaws; annulated legs [ Note - diagnosis modified in ]
 * Onychodictyidae Hou & Bergstrom, 1995
 * Onychodictyon Hou et al. 1991
 * Order unassigned
 * Orstenotubulus Maas et al. 2007 from the Furongian Orsten deposits - with retractable dorsal spines
 * Carbotubulus Haug et al. 2012 - from the Mazon creek. Dorwal armature uncertain.  Few segments, long limbs.
 * Mureropodia, from the Stage 2 Murero lagerstatten, Spain

Phylum Onychophora

 * Order Euonychophora
 * Family Peripatidae
 * Family Peripatopsidae
 * Order Ontonychophora †
 * Family Helenodoridae †
 * Family Tertiapatoidea †

Phylum Tardigrada

 * Class Eutardigrada
 * Order Apochela
 * Family Milnesiidae
 * Order Parachaela
 * 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
 * Class Mesotardigrada
 * Order Thermozodia
 * Family Thermozodiidae
 * Genus Thermozodium

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 Gnathostomulida
No classes
 * Order Bursovaginoidea
 * Order Filospermoidea

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

Phylum Cycliophora
This phylum was discovered in 1995.
 * Class Symbiida
 * Order Symbiidae
 * Genus Symbion

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

Phylum Nemertea

 * Class Anopla
 * Order Heteronemertea
 * Order Palaeonemertea
 * Class Enopla
 * Order Bdellonemertea
 * Order Hoplonemertea

Lophophorata (unranked)
No classes, no orders, families Barentsiidae, Loxokalypodidae, Loxosomatidae, Pedicellinidae
 * Brachiozoa (unranked)
 * Phylum Hyolitha †
 * Phylum Phoronida
 * Class Phoronid
 * Phylum Brachiopoda
 * Class Lingulata
 * Order Lingulida
 * Order Discinida
 * Class Craniata/Craniforma
 * Order Craniida
 * Class Rhynchonellata
 * Order Terebratulida
 * Order Rhynchonellida
 * Bryozoa (unranked)
 * Phylum Ectoprocta
 * Class Gymnolaemata
 * subclass Cheilostomata
 * subclass Ctenostomata
 * Class Phylactolaemata
 * subclass Plumatellida
 * Class Stenolaemata
 * subclass Cryptostomida †
 * subclass Cyclostomatida
 * subclass Cystoporida †
 * subclass Fenestrida †
 * subclass Hederellida †
 * subclass Trepostomatida †
 * Phylum Entoprocta

=References=