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{{short description|Wikimedia list article}}
{{Short description|none}}
[[File:AnimalsRelativeNumbers.png|thumb|240px|right|The relative number of species contributed to the total by each phylum of animals. Arthropoda is the phylum with the most individual organisms.]]
[[File:AnimalsRelativeNumbers.png|thumb|250px|right|The relative number of species contributed to the total by each phylum of animals. Arthropoda is the phylum with the most individual organisms.]]
[[File:Superbfairywrenscropped.jpeg|thumb|[[Superb fairy-wren]], ''Malurus cyaneus'']]
[[File:Protovsdeuterostomes.svg|thumb|right|250px|Differences between Deuterostomes and Protostomes]][[File:Sympetrum flaveolum - side (aka).jpg|thumb|[[Yellow-winged darter]], ''Sympetrum flaveolum'']]
[[File:Bedford's Flatworm.jpg|thumb|240px|right|''[[Pseudobiceros bedfordi]]'', (Bedford's flatworm)]]
[[File:Monachoides vicinus dart lateral.jpg|thumb|right|240px|The use of [[love dart]]s by the land snail ''[[Monachoides vicinus]]'' is a form of [[sexual selection]]]]


'''Bilateria''' is an extremely diverse group of animals containing a vast majority of its species, largely due to the enormous amount of [[arthropods]]. This article is a list of orders contained within [[Bilateria]] separated by phylum. Groups that are not contained within an order are listed separately.
'''List of bilateral animal orders''' contains the [[Bilateria]] of the animal subkingdom [[Eumetazoa]], divided into four superphyla, [[Deuterostome|Deuterostomia]], and the three [[Protostome]] superphyla, [[Ecdysozoa]], and the two [[Spiralia]] superphyla, [[Platyzoa]] and [[Lophotrochozoa]].


==List==
{{clade| style=font-size:75%;line-height:75%
===Phylum [[Annelida]]===
|1={{clade
[[File:Svømmende_blodigle.JPG|thumb|250px|''[[Hirudo medicinalis]]''. Order [[Arhynchobdellida]]]]
|label1=[[Xenacoelomorpha]]
Annelid taxonomy is currently under constant revisions due to the discovery that the class [[Polychaeta]] is paraphyletic. As such, a comprehensive list of orders is likely to change depending on what is accepted as valid.
|1={{clade
|1=[[Xenoturbellida]]
|label2=[[Acoelomorpha]]
|2={{clade
|1=[[Nemertodermatida]]
|2=[[Acoela]]
}}
}}
|label2=[[Nephrozoa]]*
|2={{clade
|label1=[[Deuterostomia]]*
|1={{clade
|label1=[[Chordata]]
|1={{clade
|1=[[Cephalochordata]]
|label2=Olfactores
|2={{clade
|1=[[Urochordata]]
|2=[[Craniata|Craniata (including Vertebrata)]]
}}
}}
|label2=[[Ambulacraria]]
|2={{clade
|1=[[Echinodermata]]
|2=[[Hemichordata]]
}}
}}
|label2=[[Protostomia]]*
|2={{clade
|1=[[Chaetognatha]]
|label2=[[Ecdysozoa]]*
|2={{clade
|label1=[[Nematozoa]]
|1={{clade
|1=[[Nematoda]]
|2=[[Nematomorpha]]
}}
|2=[[Tardigrada]]
|3={{clade
|1=[[Onychophora]]
|2=[[Arthropoda]]
}}
|label4=[[Scalidophora]]
|4={{clade
|1=[[Priapulida]]
|2=[[Loricifera]]
|3=[[Kinorhyncha]]
}}
}}
|label3=[[Spiralia]]*
|3={{clade
|label1=Polyzoa
|1={{clade
|1=[[Bryozoa]]
|2={{clade
|1=[[Entoprocta]]
|2=[[Cycliophora]]
}}
}}
|label2=[[Trochozoa]]*
|2={{clade
|1=[[Annelida]]
|2=[[Mollusca]]
|3=[[Nemertea]]
|4={{clade
|1=[[Brachiopoda]]
|2=[[Phoronida]]
}}
}}
|label3=[[Platyzoa]]*
|3={{clade
|1=[[Gastrotricha]]
|2=[[Platyhelminthes]]
|label3=[[Gnathifera (clade)|Gnathifera]]
|3={{clade
|1=[[Gnathostomulida]]
|2=[[Micrognathozoa]]
|3=[[Rotifera]]
}}
}}
}}
}}
}}
}}
}}


*'''[[Amphinomida]]'''
== Phylum [[Xenacoelomorpha]] ==
Class [[Sipuncula]]
; Subphylum [[Xenoturbella]]
*'''[[Aspidosiphonidae|Aspidosiphonida]]'''
* Class ''[[incertae sedis]]'' (Family Xenoturbellidae)
*'''[[Golfingiida]]'''
; Subphylum [[Acoelomorpha]]
*'''[[Phascolosomatidae|Phascolosomatida]]'''
* Class [[Acoela]]
Clade [[Pleistoannelida]]
** Order ''incertae sedis'' (16 families)
* Class [[Nemertodermatida]]
*Clade [[Errantia]]
**'''[[Eunicida]]'''
** Order ''incertae sedis'' (2 families)
**'''[[Phyllodocida]]'''
**'''[[Protodrilida]]'''
*'''[[Myzostomida]]'''
*Clade [[Sedentaria]]
**'''[[Capitellida]]'''{{efn|This order traditionally also includes the families Maldanidae and Arenicolidae, but is now believed to only contain Echiura and family Capitellidae. Maldanidae and Arenicolidae have been moved to the clade Maldanomorpha}}
***Family [[Capitellidae]]
***Subclass [[Echiura]]
****'''[[Bonelliida]]'''
****'''[[Echiurida]]'''
**'''[[Opheliida]]'''
**'''[[Orbiniida]]'''
**'''[[Sabellida]]'''
**'''[[Spionida]]'''
**'''[[Terebellida]]'''
**Class [[Clitellata]]
***'''[[Branchiobdellida]]'''
***'''[[Haplotaxida]]'''
***'''[[Lumbriculida]]'''
***'''[[Moniligastrida]]'''
***Subclass [[Hirudinea]]
****'''[[Rhynchobdellida]]'''
****'''[[Arhynchobdellida]]'''
Unplaced groups
*Genus ''Apistobranchus''
*Suborder Chaetopteriformia
*Suborder Cirratuliformia
*Genus ''Lobatocerebrum''
*Clade [[Maldanomorpha]]
*Clade Paleoannelida
*Family [[Polygordiidae]]
*Family [[Siboglinidae]]{{efn|This family is traditionally placed in the order Sabellida, but is now considered to be closest to Cirratuliformia and as such is now unplaced}}
===Phylum [[Arthropoda]]===
[[File:Housefly on a leaf crop.jpg|thumb|250px|The [[house fly]]. Order [[Diptera]]]]
See [[List of arthropod orders]]
===Phylum [[Brachiopoda]]===
[[File:Terebratalia_transversa_141510036.jpg|thumb|250px|''[[Terebratalia transversa]]''. Order [[Terebratulida]]]]
Class [[Craniata (brachiopod)|Craniata]]
*'''[[Craniidae|Craniida]]'''
*'''[[Craniopsida]]''' †
*'''[[Trimerellida]]''' †
Subphylum [[Linguliformea]]
*Class [[Lingulata]]
**'''[[Acrotretida]]''' †
**'''[[Lingulida]]'''
**'''[[Siphonotretida]]''' †
*Class [[Paterinata]]
**'''[[Paterinida]]''' †
Subphylum [[Rhynchonelliformea]]
*Class [[Chileata]]
**'''[[Chileida]]''' †
**'''[[Dictyonellida]]''' †
*Class [[Kutorginata]]
**'''[[Kutorginida]]''' †
*Class [[Obolellata]]
**'''[[Naukatida]]''' †
**'''[[Obolellida]]''' †
*Class [[Rhynchonellata]]
**'''[[Athyridida]]''' †
**'''[[Atrypida]]''' †
**'''[[Orthida]]''' †
**'''[[Protorthida]]''' †
**'''[[Pentamerida]]''' †
**'''[[Rhynchonellida]]'''
**'''[[Spiriferida]]''' †
**'''[[Terebratulida]]'''
**'''[[Thecideida]]'''
*Class [[Strophomenata]]
**'''[[Billingsellida]]''' †
**'''[[Orthotetida]]''' †
**'''[[Productida]]''' †
**'''[[Strophomenida]]''' †
===Phylum [[Bryozoa]]===
[[File:Membranipora_membranacea.jpg|thumb|250px|A colony of ''Membranipora membranacea''. Order [[Cheilostomatida]]]]
Class [[Gymnolaemata]]
*'''[[Cheilostomata]]'''
*'''[[Ctenostomatida]]'''
Class [[Phylactolaemata]]
*'''[[Plumatellida]]'''
Class [[Stenolaemata]]
*'''[[Cyclostomatida]]'''
*'''[[Cryptostomata]]''' †
*'''[[Cystoporida]]''' †
*'''Esthonioporata''' †
*'''[[Fenestrata]]''' †
*'''Timanodictyina'''{{efn|May be a suborder of Cryptostomata}} †
*'''[[Trepostomatida]]''' †
===Phylum [[Chaetognatha]]===
[[File:Chaetoblack.png|thumb|250px|''Spadella cephaloptera''. Order [[Phragmophora]]]]
*'''[[Aphragmophora]]'''
*'''[[Phragmophora]]'''
*'''[[Protoconodonta]]''' †
Unplaced groups
*Genus ''[[Capinatator]]''
*Genus ''Eognathacantha''
*Genus ''Protodagitta''
*Genus ''[[Timorebestia]]''
===Phylum [[Chordata]]===
[[File:Great White Shark (Carcharodon carcharias) (32911393995).jpg|thumb|250px|The [[great white shark]]. Order [[Lamniformes]]]]
See [[List of chordate orders]]
===Phylum [[Cycliophora]]===
[[File:CYC-000249_hab_Symbion_americanus_Paratype.tif|thumb|250px|''[[Symbion americanus]]''. Order [[Symbiida]]]]
Class [[Eucycliophora]]
*'''[[Symbiida]]'''
===Phylum [[Dicyemida]]===
[[File:Dicyema_japonicum.png|thumb|250px|''[[Dicyema]] japonicum'']]
Dicyemida does not contain any established orders but does contain three families: [[Conocyemidae]], [[Dicyemidae]] and [[Kantharellidae]]
===Phylum [[Echinodermata]]===
[[File:Common Sea Star (Asterias rubens) - Oslo, Norway 2021-03-25 (03).jpg|thumb|250px|''[[Asterias rubens]]''. Order [[Forcipulatida]]]]
See [[List of echinoderm orders]]
===Phylum [[Entoprocta]]===
[[File:Barentsia_ramosa_171739034.jpg|thumb|250px|A colony of ''[[Barentsia]] ramosa'']]
Entoprocta has no orders but is split into four families; [[Barentsiidae]], [[Pedicellinidae]], [[Loxokalypodidae]], and [[Loxosomatidae]]
===Phylum [[Gastrotricha]]===
[[File:Paradasys subterraneus.jpg|thumb|250px|''[[Paradasys]] subterraneus''. Order [[Macrodasyida]]]]
*'''[[Chaetonotida]]'''
*'''[[Macrodasyida]]'''
===Phylum [[Gnathostomulida]]===
[[File:Gnathostomula paradoxa Sylt.tif|thumb|250px|''Gnathostomula paradoxa''. Order [[Bursovaginoidea]]]]
*'''[[Bursovaginoidea]]'''
*'''[[Filospermoidea]]'''
===Phylum [[Hemichordata]]===
[[File:Expn7509 (38827990365).jpg|thumb|250px|Unknown species of [[acorn worm]] (class Enteropneusta).]]
The classes [[Planctosphaeroidea]] and [[Enteropneusta]] do not contain any orders


Class [[Pterobranchia]]
==[[Nephrozoa]] (unranked)==
*'''[[Cephalodiscida]]'''
*Subclass [[Graptolithina]]
**'''[[Rhabdopleurida]]'''
**'''Dendroidea''' †
**'''Graptoloidea''' †


Unplaced groups
== Infrakingdom [[Deuterostomia]] ==
*Family [[Cysticamaridae]]
*Family [[Wimanicrustidae]]
*Family [[Dithecodendridae]]
*Family [[Cyclograptidae]]
===Phylum [[Kinorhyncha]]===
[[File:Echinoderes marthae SEM.tif|thumb|250px|''[[Echinoderes]] marthae''. Order [[Echinorhagata]]]]
Class [[Cyclorhagida]]
*'''[[Echinorhagata]]'''
*'''Kentrorhagata'''
*'''Xenosomata'''
Class [[Allomalorhagida]]
*'''Anomoirhaga'''
Unplaced groups
*Genus ''[[Eokinorhynchus]]''
*Family [[Pycnophyidae]]
===Phylum [[Loricifera]]===
[[File:Spinoloricus.png|thumb|250px|''[[Spinoloricus cinziae]]''. Order [[Nanaloricida]]]]
Loricifera has no classes and all species are contained within one order
*'''[[Nanaloricida]]'''
===Phylum [[Micrognathozoa]]===
[[File:Limnognathia_maerski_youtube.png|thumb|250px|''[[Limnognathia maerski]]''. Order [[Limnognathida]]]]
Micrognathozoa has no classes and its single species is placed in one order
*'''[[Limnognathida]]'''
===Phylum [[Mollusca]]===
[[File:Squid_colors_2.jpg|thumb|250px|''[[Sepioteuthis sepioidea]]''. Order [[Myopsida]]]]
See [[List of mollusc orders]]
===Phylum [[Nematoda]]===
[[File:CelegansGoldsteinLabUNC.jpg|thumb|250px|''[[Caenorhabditis elegans]]''. Order [[Rhabditida]]]]
Nematode taxonomy is far from fully resolved, and different schemes might be used. For this list, Mike Hodda's ''Phylum Nematoda: a classification, catalogue and index of valid genera, with a census of valid species'' classification is used.<ref>{{cite journal|last=Hodda|first=M.|year=2022|title=Phylum Nematoda: a classification, catalogue and index of valid genera, with a census of valid species|journal=Zootaxa|volume=5114|issue=1|pages=1–289|doi=10.11646/zootaxa.5114.1.1|pmid=35391386 |doi-access=free}}</ref>


Class [[Enoplea]]
=== Phylum [[Chordate|Chordata]] ===
*Subclass [[Enoplia]]
{{main|List of chordate orders}}
**Superorder Enoplica
***'''Alaimida'''
***'''[[Enoplida]]'''
***'''Ironida'''
***'''Trefusiida'''
***'''Tripyloidida'''
**Superorder Rhaptothyreica
***'''Rhaptothyreida'''
*Subclass Oncholaimia
**'''[[Oncholaimida]]'''
*Subclass Triplonchia
**'''[[Triplonchida]]'''
**'''Tripylida'''
Class Dorylaimea
*Subclass [[Dorylaimia]]
**'''[[Dorylaimida]]'''
*Subclass Bathyodontia
**'''Bathyodontida'''
**'''[[Mononchida]]'''
**'''[[Mermithida]]'''
*Subclass Trichocephalia
**'''[[Trichocephalida]]'''
**'''Marimermithida'''
**'''Dioctophymatida'''
**'''[[Muspiceida]]'''
Class [[Chromadorea]]
*Subclass [[Chromadoria]]
**'''[[Chromadorida]]'''
**'''Selachinematida'''
**'''[[Desmodorida]]'''
**'''[[Desmoscolecida]]'''
*Subclass Plectia
**Superorder Monhysterica
***'''[[Monhysterida]]'''
**Superorder Plectica
***'''[[Leptolaimida]]'''
***'''[[Plectida]]'''
***'''[[Benthimermithida]]'''
**Superorder Teratocephalica
***'''Teratocephalida'''
**Superorder Rhabditica
***'''[[Diplogasterida]]'''
***'''[[Rhabditida]]'''
***'''[[Spirurida]]'''
***'''Rhigonematida'''
***'''Panagrolaimida'''
***'''Drilonematida'''
===Phylum [[Nematomorpha]]===
[[File:Paragordius_tricuspidatus.jpeg|thumb|250px|''[[Paragordius]] tricuspidatus''. Order [[Gordioidea]]]]
*'''[[Gordioidea]]'''
*'''[[Nectonematoidea]]'''
===Phylum [[Nemertea]]===
[[File:Five-lined Ribbon Worm (Baseodiscus quinquelineatus) (15622965514).jpg|thumb|250px|''[[Baseodiscus]] quinquelineatus''. Order [[Heteronemertea]]]]
Class [[Hoplonemertea]]
*'''[[Monostilifera]]'''
*'''[[Polystilifera]]'''
Class [[Palaeonemertea]]
*'''Archinemertea'''
*'''Carinomiformes'''
*'''[[Tubulaniformes]]'''
Class [[Pilidiophora]]
*'''[[Heteronemertea]]'''
===Phylum [[Onychophora]]===
[[File:Epiperipatus_biolleyi.png|thumb|250px|''[[Epiperipatus]] biolleyi'']]
Onychophora contains no classes and no orders, but is split into two living families; [[Peripatidae]] and [[Peripatopsidae]], and 5 extinct genera; ''[[Antennacanthopodia]]'', ''Antennipatus'', ''[[Helenodora]]'', ''[[Succinipatopsis]]'', and ''[[Tertiapatus]]''.
===Phylum [[Orthonectida]]===
[[File:EB1911 Mesozoa - Rhopalura giardii.jpg|thumb|250px|A drawing of ''Rhopalura giardii'']]
Orthonectida contains no classes or orders, but is split into two families; [[Pelmatosphaeridae]] and [[Rhopaluridae]]
===Phylum [[Phoronida]]===
[[File:Phoronopsis_harmeri_611.jpg|thumb|250px|''Phoronopsis harmeri'']]
Phoronida contains no classes, orders, or families, but is split into two genera; ''[[Phoronis]]'' and ''[[Phoronopsis]]''
===Phylum [[Platyhelminthes]]===
[[File:Flatworm Pseudoceros ferrugineus - Bunaken, Sulawesi, Indonesia.jpg|thumb|250px|''[[Pseudoceros]] ferrugineus''. Order [[Polycladida]]]]
The class [[Catenulida]] contains no orders.


Subphylum [[Rhabditophora]]
=== [[Ambulacraria]] ===
*Clade [[Macrostomorpha]]
**'''[[Macrostomida]]'''
*Clade [[Trepaxonemata]]
**'''Gnosonesimida'''
**Clade [[Amplimatricata]]
***'''[[Lecithoepitheliata]]'''
***'''[[Polycladida]]'''
**Clade Euneoophora
***'''[[Proseriata]]'''
***'''[[Rhabdocoela]]'''
***Clade Acentrosomata
****Clade Adiaphanida
*****'''[[Prolecithophora]]'''
*****'''[[Fecampiida]]'''
*****'''[[Tricladida]]'''
****Clade [[Bothrioneodermata]]
*****'''[[Bothrioplanida]]'''
*****Superclass [[Neodermata]]
******Class [[Cestoda]]
*******Subclass [[Cestodaria]]
********'''[[Amphilinidea]]'''
********'''[[Gyrocotylidea]]'''
*******Subclass [[Eucestoda]]
********'''[[Spathebothriidea]]'''
********'''[[Caryophyllidea]]'''
********'''[[Haplobothriidea]]'''
********'''[[Diphyllobothriidea]]'''
********'''[[Diphyllidea]]'''
********'''[[Trypanorhyncha]]'''
********'''[[Bothriocephalidea]]'''
********'''[[Litobothriidea]]'''
********'''[[Lecanicephaloidea]]'''
********'''[[Rhinebothriidea]]'''
********'''[[Tetraphyllidea]]'''
********'''[[Onchoproteocephalidea]]'''
********'''[[Nippotaeniidea]]'''
********'''[[Tetrabothriidea]]'''
********'''[[Cyclophyllidea]]'''
******Class [[Monogenea]]
*******Subclass [[Monopisthocotylea]]
********'''[[Monocotylidea]]'''
********'''[[Capsalidea]]'''
********'''Lagarocotylidea'''
********'''[[Montchadskyellidea]]'''
********'''[[Gyrodactylidea]]'''
********'''[[Dactylogyridea]]'''
*******Subclass [[Polyopisthocotylea]]
********'''[[Polystomatidea]]'''
********'''[[Chimaericolidea]]'''
********'''[[Diclybothriidea]]'''
********'''[[Mazocraeidea]]'''
******Class [[Trematoda]]
*******Subclass [[Aspidogastrea]]
********'''[[Aspidogastrida]]'''
********'''[[Stichocotylida]]'''
*******Subclass [[Digenea]]
********'''[[Diplostomida]]'''
********'''[[Plagiorchiida]]'''


Unplaced groups
==== Phylum [[Hemichordate|Hemichordata]] ====
*Genus ''[[Haplopharynx]]''
[[File:Eichelwurm.jpg|thumb|220px|Acorn worm]]
===Phylum [[Priapulida]]===
; Class Enteropneusta ([[Acorn worms]])
[[File:Adult priapulid.jpg|thumb|250px|''[[Priapulus]] caudatus''. Order [[Priapulimorphida]]]]
* Order Enteropneusta
Several stem group priapulid genera are not classified within any established orders. The orders listed below are solely crown priapulids.
; Class [[Graptolithina]] †
* Order [[Camaroidea]] †
* Order [[Crustoidea]] †
* Order [[Dendroidea]] †
* Order [[Dithecoidea]] †
* Order [[Graptoloidea]] †
* Order [[Stolonoidea]] †
* Order [[Tuboidea]] †
; Class [[Planctosphaeroidea]]
No order, one genus, one species ''Planctosphaera pelagica''
; Class [[Pterobranchia]]
* Order [[Cephalodiscida]]
* Order [[Rhabdopleurida]]


*'''[[Halicryptomorphida]]'''
==== Phylum [[Echinoderm]]ata ====
*'''[[Priapulimorphida]]'''
{{main|List of echinodermata orders}}
*'''Meiopriapulomorpha'''
*'''[[Seticoronaria]]'''{{efn|Sometimes treated as a class}}
===Phylum [[Rotifera]]===
[[File:Habrotrocha rosa 1.jpg|thumb|250px|''[[Habrotrocha rosa]]''. Order Philodinida]]
The group [[Acanthocephala]] is traditionally treated as a separate phylum from Rotifera. However, it was found that Acanthocephala are [[phylogenetics|phylogenetically]] contained within the rotifers, and this list reflects these findings.


*'''[[Seisonida]]'''
== Infrakingdom [[Protostomia]] ==
Superclass [[Eurotatoria]]
*Class [[Bdelloidea]]
**'''Adinetida'''
**'''Philodinavida'''
**'''[[Philodinida]]'''
*Class [[Monogononta]]
**'''[[Collothecaceae]]'''
**'''[[Flosculariaceae]]'''
**'''[[Ploima]]'''
Clade [[Acanthocephala]]
*Class [[Archiacanthocephala]]
**'''[[Apororhynchida]]'''
**'''[[Gigantorhynchida]]'''
**'''[[Moniliformida]]'''
**'''[[Oligacanthorhynchida]]'''
*Class [[Eoacanthocephala]]
**'''[[Gyracanthocephala]]'''
**'''[[Neoechinorhynchida]]'''
*Class [[Palaeacanthocephala]]
**'''[[Echinorhynchida]]'''
**'''[[Heteramorphida]]'''
**'''[[Polymorphida]]'''
*'''[[Polyacanthorhynchida]]'''
===Phylum [[Tardigrada]]===
[[File:Tardigrade Acutuncus Antarcticus.jpg|thumb|250px|''[[Acutuncus antarcticus]]''. Order [[Parachela (tardigrade)|Parachela]]]]
The class [[Mesotardigrada]] contains one species, ''Thermozodium esakii'', which has not been found since its reported discovery in 1937, and its existence is dubious. It is contained within the order '''Thermozodia'''.


*Class [[Eutardigrada]]
=== Superphylum [[Ecdysozoa]] ===
**'''[[Apochela]]'''
**'''[[Parachela (tardigrade)|Parachela]]'''
*Class [[Heterotardigrada]]
**'''[[Arthrotardigrada]]'''
**'''[[Echiniscoidea]]'''
===Phylum [[Xenacoelomorpha]]===
[[File:Neochildia fusca.jpg|thumb|250px|''[[Neochildia]] fusca''. Order [[Acoela]]]]
The subphylum [[Xenoturbellida]] does not contain any classes or orders. It's only family is Xenoturbellidae which contains one genus, ''Xenoturbella''.
*Subphylum [[Acoelomorpha]]
**'''[[Acoela]]'''


The class [[Nemertodermatida]] does not contain any orders, but does contain two families; [[Ascopariidae]] and [[Nemertodermatidae]].
==== [[Cycloneuralia]] (unranked) ====
==Notes==

{{Notelist}}
===== [[Scalidophora]] (unranked) =====

====== Phylum [[Kinorhyncha]] ======
[[File:Kinorhyncha.png|thumb|right|220px|''[[Kinorhyncha]]'']]
No class, 2 orders, called mud dragons, very common in mud or sand
* Order [[Cyclorhagida]]
* Order [[Homalorhagida]]

====== Phylum [[Loricifera]] ======
[[File:Pliciloricus enigmatus.jpg|thumb|right|220px|''[[Pliciloricus enigmatus]]'']]
No class, one order Nanaloricida

====== Phylum [[Priapulida]] ======
[[File:Priapulus caudatus.jpg|thumb|right|220px|''[[Priapulus caudatus]]'']]
; Class Priapulimorpha
* Order [[Priapulimorphida]]
** Family [[Priapulidae]]
** Family [[Tubiluchidae]]
; Class [[Halicryptomorpha]]
* Order Halicryptomorphida
; Class Seticoronaria
* Order Seticoronarida
*** Genus [[Maccabeus (genus)|Maccabeus]]

===== [[Nematoida]] (unranked) =====

====== Phylum [[Nematoda]] ======
{{see also|List of nematode families}}

====== Phylum [[Nematomorpha]] ======
; Class [[Gordioidea]]
; Class [[Nectonematoida]]

==== [[Panarthropoda]] (unranked) ====

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

*Order Archonychophora
*[[Archonychophora]] <small>Hou & Bergstrom, 1995</small><ref name=Hou1995>{{Cite journal | last1 = Hou | first1 = X. | last2 = Bergström | first2 = J. A. N. | doi = 10.1111/j.1096-3642.1995.tb00110.x | title = Cambrian lobopodians-ancestors of extant onychophorans? | journal = Zoological Journal of the Linnean Society | volume = 114 | pages = 3–19 | year = 1995 | pmid = | pmc = }}</ref> - Undifferentiated appendages; each segment the same as each other. See <ref name="Ma2009">{{Cite journal | last1 = Ma | first1 = X. | last2 = Hou | first2 = X. | last3 = Bergström | first3 = J. | doi = 10.1016/j.asd.2009.03.001 | title = Morphology of Luolishania longicruris (Lower Cambrian, Chengjiang Lagerstätte, SW China) and the phylogenetic relationships within lobopodians | journal = Arthropod Structure & Development | volume = 38 | issue = 4 | pages = 271–291 | year = 2009 | pmid = | pmc = }}</ref>
*[[Luolishaniidae]] <small>Hou & Bergstrom, 1995</small> - three small rounded sclerites per segment - these are thorn-shaped spines.<ref name="Ma2009" />
**''[[Luolishania]]'' Hou & Chen 1989
**''[[Miraluolishania]]'' Liu & Shu 2004
*[[Paucipodiidae]] <small>Hou ''et al.'', 2004</small><ref name="Xian-Guang Hou, Xiao-Ya Ma, Jie Zhao & Jan Bergström 2004 235–244">{{cite journal |author=Xian-Guang Hou, Xiao-Ya Ma, Jie Zhao & Jan Bergström |year=2004 |title=The lobopodian ''Paucipodia inermis'' from the Lower Cambrian Chengjiang fauna, Yunnan, China |journal=[[Lethaia]] |volume=37 |issue=3 |pages=235–244 |doi=10.1080/00241160410006555|last2=Ma |last3=Zhao |last4=Bergström }}</ref> - 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]] <small>Hutchinson, 1930</small> - Spiny legs, reduced tail
*Aysheaiidae <small>Walcott, 1911</small> - many claws on each leg. Anterior grasping appendages with long spines.
**''[[Aysheaia]]'' Walcott 1911
*[[Xenusiidae]] <small>Dzik & Krumbiegel, 1989</small> - >20 leg-bearing segments; paired, rounded sclerites on each segment; spiny legs.
**''[[Xenusion]]'' Pompeckj, 1927
**''[[Jianshanopodia]]'' Liu et al.<ref name=Liu2006>{{cite journal|title=A large xenusiid lobopod with complex appendages from the Lower Cambrian Chengjiang Lagerstätte|author1=Jianni Liu |author2=Degan Shu |author3=Jian Han |author4=Zhifei Zhang |author5=Xingliang Zhang |last-author-amp=yes |journal=Acta Palaeontol. Pol.
|volume=51
|issue=2
|pages=215–222|year= 2006 |url=http://www.app.pan.pl/archive/published/app51/app51-215.pdf|format=PDF |accessdate = 9 February 2011
}}</ref> - 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]] <small>Hou & Bergstrom, 1995</small> - paired sclerites; elongated head sclerites
*[[Eoconchariidae]] <small>Hou & Shu, 1987</small> - ~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
*[[Hallucigenia|Hallucigeniidae]] <small>Conway Morris, 1977</small> - ~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<ref name="Whittle2009">{{Cite journal| first1 = R. J.| first2 = S. E.| first3 = R. J.| last1 = Whittle| first4 = J.| title = An Ordovician Lobopodian from the Soom Shale Lagerstätte, South Africa| journal = Palaeontology| volume = 52| issue = 3| pages = 561–567| year = 2009| doi = 10.1111/j.1475-4983.2009.00860.x| last2 = Gabbott| last3 = Aldridge| last4 = Theron}}</ref>
*[[Cardiodictyidae]] <small>Hou & Bergstrom, 1995</small> - many segments (~23); large sclerites cover head; hexagonal sclerite on each body segment.
**''[[Cardiodictyon]]'' Hou et al. 1991 - Known from the Chengjiang<ref name="Whittle2009" />
*Order Paronychophora
*[[Paronychophora]] <small>Hou & Bergstrom, 1995</small> - short, downwards facing head; papillae on body and legs, some arranged in rows; shield-like sclerites on head; dorsal armature of spines;<ref name="Liu2008">{{Cite journal | last1 = Liu | first1 = J. | last2 = Shu | first2 = D. | last3 = Han | first3 = J. | last4 = Zhang | first4 = Z. | last5 = Zhang | first5 = X. | title = The LobopodOnychodictyonfrom the Lower Cambrian Chengjiang Lagerstätte Revisited | doi = 10.4202/app.2008.0209 | journal = Acta Palaeontologica Polonica | volume = 53 | issue = 2 | pages = 285–292 | year = 2008 | pmid = | pmc = | doi-access = free }}</ref> claw-like jaws; annulated legs [ Note - diagnosis modified in <ref name="Ma2009"/> ]
*[[Onychodictyidae]] <small>Hou & Bergstrom, 1995</small>
**''[[Onychodictyon]]'' Hou et al. 1991
* Order unassigned
*''[[Orstenotubulus]]'' Maas et al. 2007 from the Furongian [[Orsten]] deposits - with retractable dorsal spines<ref name="Maas2007">{{Cite journal | last1 = Maas | first1 = A. | last2 = Mayer | first2 = G. | last3 = Kristensen | first3 = R. M. | last4 = Waloszek | first4 = D. | title = A Cambrian micro-lobopodian and the evolution of arthropod locomotion and reproduction | doi = 10.1007/s11434-007-0515-3 | journal = Chinese Science Bulletin | volume = 52 | issue = 24 | pages = 3385–3392 | year = 2007 | pmid = | pmc = }}</ref>
*''[[Carbotubulus]]'' Haug et al. 2012 <ref name="Haug2012">{{Cite journal | last1 = Haug | first1 = J. T. | last2 = Mayer | first2 = G. | last3 = Haug | first3 = C. | last4 = Briggs | first4 = D. E. G. | title = A Carboniferous Non-Onychophoran Lobopodian Reveals Long-Term Survival of a Cambrian Morphotype | doi = 10.1016/j.cub.2012.06.066 | journal = Current Biology | year = 2012 | pmid = 22885062| pmc = | volume=22 | pages=1673–1675| doi-access = free }}</ref> - from the Mazon creek. Dorwal armature uncertain. Few segments, long limbs.
*''[[Mureropodia]]'',<ref name="Gámez Vintaned2011">{{Cite book | last1 = Gámez Vintaned | first1 = J. A. | last2 = Liñán | first2 = E. | last3 = Zhuravlev | first3 = A. | doi = 10.1007/978-3-642-20763-1_12 | chapter = A New Early Cambrian Lobopod-Bearing Animal (Murero, Spain) and the Problem of the Ecdysozoan Early Diversification | title = Evolutionary Biology – Concepts, Biodiversity, Macroevolution and Genome Evolution | pages = 193 | year = 2011 | isbn = 978-3-642-20762-4 | pmid = | pmc = }}</ref> from the Stage 2 Murero lagerstatten, Spain

; Class [[Siberion]]
**Family Xenusiidae
***Genus Siberion
; Class [[Hadranax]]
*Order [[Protonychophora]]
**Family [[Xenusiidae]]
***Genus [[Hadranax]]
* Order [[Archonychophora]] <small>Hou & Bergstrom, 1995</small><ref name="Hou1995"/> - Undifferentiated appendages; each segment the same as each other. See <ref name="Ma2009"/>
**[[Luolishaniidae]] <small>Hou & Bergstrom, 1995</small> - three small rounded sclerites per segment - these are thorn-shaped spines.<ref name="Ma2009" />
***''[[Luolishania]]'' Hou & Chen 1989
***''[[Miraluolishania]]'' Liu & Shu 2004
**[[Paucipodiidae]] <small>Hou ''et al.'', 2004</small><ref name="Xian-Guang Hou, Xiao-Ya Ma, Jie Zhao & Jan Bergström 2004 235–244"/> - with no dorsal sclerites, two claws, fine annulation and few segments.
***''[[Paucipodia]]'' Hou et al. 2004
* Order [[Protonychophora]] <small>Hutchinson, 1930</small> - Spiny legs, reduced tail
* Order [[Scleronychophora]] <small>Hou & Bergstrom, 1995</small> - paired sclerites; elongated head sclerites
**[[Eoconchariidae]] <small>Hou & Shu, 1987</small> - ~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
**[[Hallucigenia|Hallucigeniidae]] <small>Conway Morris, 1977</small> - ~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<ref name="Whittle2009"/>
**[[Cardiodictyidae]] <small>Hou & Bergstrom, 1995</small> - many segments (~23); large sclerites cover head; hexagonal sclerite on each body segment.
***''[[Cardiodictyon]]'' Hou et al. 1991 - Known from the Chengjiang<ref name="Whittle2009" />
* Order [[Paronychophora]] <small>Hou & Bergstrom, 1995</small> - short, downwards facing head; papillae on body and legs, some arranged in rows; shield-like sclerites on head; dorsal armature of spines;<ref name="Liu2008"/> claw-like jaws; annulated legs [ Note - diagnosis modified in <ref name="Ma2009"/> ]
**[[Onychodictyidae]] <small>Hou & Bergstrom, 1995</small>
***''[[Onychodictyon]]'' Hou et al. 1991
* Order unassigned
*''[[Orstenotubulus]]'' Maas et al. 2007 from the Furongian [[Orsten]] deposits - with retractable dorsal spines<ref name="Maas2007"/>
*''[[Carbotubulus]]'' Haug et al. 2012 <ref name="Haug2012"/> - from the Mazon creek. Dorwal armature uncertain. Few segments, long limbs.
*''[[Mureropodia]]'',<ref name="Gámez Vintaned2011"/> from the Stage 2 Murero lagerstatten, Spain

===== Phylum [[Onychophora]] =====
* Order [[Euonychophora]]
**Family [[Peripatidae]]
**Family [[Peripatopsidae]]
*Order [[Ontonychophora]] †
**Family [[Helenodoridae]] †
**Family [[Tertiapatoidea]] †

===== [[Tactopoda]] (unranked) =====

====== Phylum [[Tardigrade|Tardigrada]] ======
[[File:Waterbear.jpg|thumb|right|220px|''[[Hypsibius dujardini]]'']]
[[File:Echiniscus sp.jpg|thumb|right|220px|''Echiniscus'']]
; 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 [[Arthropoda]] ======
{{main|List of arthropod orders}}

=== [[Spiralia]] (unranked) ===

==== [[Gnathifera (clade)|Gnathifera]] (unranked) ====

===== Phylum [[Gnathostomulid]]a =====
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]]

===== [[Syndermata]] (unranked)=====

====== Phylum [[Rotifer]]a ======
[[File:Bdelloid body areas.gif|150px | thumb |Figure 1: [Scanning electron microscope|SEM] pictures of some Bdelloidea species of the genus Rotaria with head (red), tail (white) and trunk (blue) areas highlighted]]
; Class [[Bdelloidea]]
* Order [[Bdelloida]]
; Class [[Monogononta]]
* Order [[Collothecida]]
* Order [[Flosculariida]]
* Order [[Ploimida]]
; Class [[Seisonidea]]
* Order [[Seisonida]]

====== Phylum [[Acanthocephala]] ======
[[File:Parasite140083-fig5 Figs 31-36 Cathayacanthus spinitruncatus.tif|thumb|right|150px|Scanning electron microscopy of proboscis of an archiacanthocephalan <ref>{{cite journal | last1 = Amin | first1 = O. A | last2 = Heckmann | first2 = R. A | last3 = Ha | first3 = N. V. | year = 2014 | title = Acanthocephalans from fishes and amphibians in Vietnam, with descriptions of five new species. ' | journal = Parasite | volume = 21 | issue = | page = 53 | doi = 10.1051/parasite/2014052 | pmid = 25331738 | pmc=4204126}}</ref>]]
; Class [[Archiacanthocephala]]
* Order [[Apororhynchida]]
* Order [[Gigantorhynchida]]
* Order [[Moniliformida]]
* Order [[Oligacanthorhynchida]]
; Class [[Eoacanthocephala]]
* Order [[Gyracanthocephala]]
* Order [[Neoechinorhynchida]]
; Class [[Palaeacanthocephala]]
* Order [[Echinorhynchida]]
* Order [[Polymorphida]]

==== [[Platytrochozoa]] (unranked) ====

===== [[Mesozoa]] (unranked) =====

====== Phylum [[Dicyemida]] ======

No classes, no orders, families Conocyemidae, Dicyemidae, Kantharellidae

====== Phylum [[Monoblastozoa]] ======

* Class ''incertae sedis'' (1 species: ''[[Salinella salve]]'')

====== Phylum [[Orthonectida]] ======

* Class ''incertae sedis'' (2 families)

===== [[Rouphozoa]] (unranked) =====

======Phylum Platyhelminthes======
[[File:Taenia saginata adult 5260 lores.jpg|thumb|right|220px|''[[Taenia saginata]]'']]

;;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]]
[[Image:Botulus microporus.jpg|right|thumb|220px|''[[Botulus microporus]]'']]
*Subclass [[Aspidogastrea]]
**Order [[Aspidogastrida]]
**Order [[Stichocotylida]]
*Subclass [[Digenea]]
[[Image:Helicometra.jpg|thumb|right|220px|''[[Helicometra]]'']]
**Order [[Diplostomida]]
**Order [[Plagiorchiida]]

====== Phylum [[Gastrotricha]] ======
No classes
* Order [[Chaetonotida]]
* Order [[Macrodasyida]]

===== Superphylum [[Lophotrochozoa]] =====



====== Phylum [[Mollusca]] ======
{{main|List of mollusc orders}}

====== Phylum [[Annelid]]a ======
{{main|List of Annelid families}}

====== [[Kryptotrochozoa]] (unranked) ======
; Phylum [[Nemertea]]
* Class [[Anopla]]
** Order [[Heteronemertea]]
** Order [[Palaeonemertea]]
* Class [[Enopla]]
** Order [[Bdellonemertea]]
** Order [[Hoplonemertea]]
; [[Lophophorata]] (unranked)
* [[Brachiozoa]] (unranked)
** Phylum [[Hyolitha]] †
** Phylum [[Phoronid]]a
*** Class Phoronid
** Phylum [[Brachiopod]]a
*** Class [[Lingulata]]
**** Order [[Lingulida]]
**** Order [[Discinida]]
*** Class [[Craniforma|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]]
No classes, no orders, families Barentsiidae, Loxokalypodidae, Loxosomatidae, Pedicellinidae


==References==
==References==
{{Reflist}}
<references/>


[[Category:Bilaterian orders| Bilateral animals]]
[[Category:Bilaterian orders| Bilateral animals]]
[[Category:Taxonomic lists (orders)]]
[[Category:Taxonomic lists (orders)|Bilaterian]]

Latest revision as of 16:38, 12 November 2024

The relative number of species contributed to the total by each phylum of animals. Arthropoda is the phylum with the most individual organisms.

Bilateria is an extremely diverse group of animals containing a vast majority of its species, largely due to the enormous amount of arthropods. This article is a list of orders contained within Bilateria separated by phylum. Groups that are not contained within an order are listed separately.

List

[edit]

Phylum Annelida

[edit]
Hirudo medicinalis. Order Arhynchobdellida

Annelid taxonomy is currently under constant revisions due to the discovery that the class Polychaeta is paraphyletic. As such, a comprehensive list of orders is likely to change depending on what is accepted as valid.

Class Sipuncula

Clade Pleistoannelida

Unplaced groups

Phylum Arthropoda

[edit]
The house fly. Order Diptera

See List of arthropod orders

Phylum Brachiopoda

[edit]
Terebratalia transversa. Order Terebratulida

Class Craniata

Subphylum Linguliformea

Subphylum Rhynchonelliformea

Phylum Bryozoa

[edit]
A colony of Membranipora membranacea. Order Cheilostomatida

Class Gymnolaemata

Class Phylactolaemata

Class Stenolaemata

Phylum Chaetognatha

[edit]
Spadella cephaloptera. Order Phragmophora

Unplaced groups

Phylum Chordata

[edit]
The great white shark. Order Lamniformes

See List of chordate orders

Phylum Cycliophora

[edit]
Symbion americanus. Order Symbiida

Class Eucycliophora

Phylum Dicyemida

[edit]
Dicyema japonicum

Dicyemida does not contain any established orders but does contain three families: Conocyemidae, Dicyemidae and Kantharellidae

Phylum Echinodermata

[edit]
Asterias rubens. Order Forcipulatida

See List of echinoderm orders

Phylum Entoprocta

[edit]
A colony of Barentsia ramosa

Entoprocta has no orders but is split into four families; Barentsiidae, Pedicellinidae, Loxokalypodidae, and Loxosomatidae

Phylum Gastrotricha

[edit]
Paradasys subterraneus. Order Macrodasyida

Phylum Gnathostomulida

[edit]
Gnathostomula paradoxa. Order Bursovaginoidea

Phylum Hemichordata

[edit]
Unknown species of acorn worm (class Enteropneusta).

The classes Planctosphaeroidea and Enteropneusta do not contain any orders

Class Pterobranchia

Unplaced groups

Phylum Kinorhyncha

[edit]
Echinoderes marthae. Order Echinorhagata

Class Cyclorhagida

Class Allomalorhagida

  • Anomoirhaga

Unplaced groups

Phylum Loricifera

[edit]
Spinoloricus cinziae. Order Nanaloricida

Loricifera has no classes and all species are contained within one order

Phylum Micrognathozoa

[edit]
Limnognathia maerski. Order Limnognathida

Micrognathozoa has no classes and its single species is placed in one order

Phylum Mollusca

[edit]
Sepioteuthis sepioidea. Order Myopsida

See List of mollusc orders

Phylum Nematoda

[edit]
Caenorhabditis elegans. Order Rhabditida

Nematode taxonomy is far from fully resolved, and different schemes might be used. For this list, Mike Hodda's Phylum Nematoda: a classification, catalogue and index of valid genera, with a census of valid species classification is used.[1]

Class Enoplea

  • Subclass Enoplia
    • Superorder Enoplica
      • Alaimida
      • Enoplida
      • Ironida
      • Trefusiida
      • Tripyloidida
    • Superorder Rhaptothyreica
      • Rhaptothyreida
  • Subclass Oncholaimia
  • Subclass Triplonchia

Class Dorylaimea

Class Chromadorea

Phylum Nematomorpha

[edit]
Paragordius tricuspidatus. Order Gordioidea

Phylum Nemertea

[edit]
Baseodiscus quinquelineatus. Order Heteronemertea

Class Hoplonemertea

Class Palaeonemertea

Class Pilidiophora

Phylum Onychophora

[edit]
Epiperipatus biolleyi

Onychophora contains no classes and no orders, but is split into two living families; Peripatidae and Peripatopsidae, and 5 extinct genera; Antennacanthopodia, Antennipatus, Helenodora, Succinipatopsis, and Tertiapatus.

Phylum Orthonectida

[edit]
A drawing of Rhopalura giardii

Orthonectida contains no classes or orders, but is split into two families; Pelmatosphaeridae and Rhopaluridae

Phylum Phoronida

[edit]
Phoronopsis harmeri

Phoronida contains no classes, orders, or families, but is split into two genera; Phoronis and Phoronopsis

Phylum Platyhelminthes

[edit]
Pseudoceros ferrugineus. Order Polycladida

The class Catenulida contains no orders.

Subphylum Rhabditophora

Unplaced groups

Phylum Priapulida

[edit]
Priapulus caudatus. Order Priapulimorphida

Several stem group priapulid genera are not classified within any established orders. The orders listed below are solely crown priapulids.

Phylum Rotifera

[edit]
Habrotrocha rosa. Order Philodinida

The group Acanthocephala is traditionally treated as a separate phylum from Rotifera. However, it was found that Acanthocephala are phylogenetically contained within the rotifers, and this list reflects these findings.

Superclass Eurotatoria

Clade Acanthocephala

Phylum Tardigrada

[edit]
Acutuncus antarcticus. Order Parachela

The class Mesotardigrada contains one species, Thermozodium esakii, which has not been found since its reported discovery in 1937, and its existence is dubious. It is contained within the order Thermozodia.

Phylum Xenacoelomorpha

[edit]
Neochildia fusca. Order Acoela

The subphylum Xenoturbellida does not contain any classes or orders. It's only family is Xenoturbellidae which contains one genus, Xenoturbella.

The class Nemertodermatida does not contain any orders, but does contain two families; Ascopariidae and Nemertodermatidae.

Notes

[edit]
  1. ^ This order traditionally also includes the families Maldanidae and Arenicolidae, but is now believed to only contain Echiura and family Capitellidae. Maldanidae and Arenicolidae have been moved to the clade Maldanomorpha
  2. ^ This family is traditionally placed in the order Sabellida, but is now considered to be closest to Cirratuliformia and as such is now unplaced
  3. ^ May be a suborder of Cryptostomata
  4. ^ Sometimes treated as a class

References

[edit]
  1. ^ Hodda, M. (2022). "Phylum Nematoda: a classification, catalogue and index of valid genera, with a census of valid species". Zootaxa. 5114 (1): 1–289. doi:10.11646/zootaxa.5114.1.1. PMID 35391386.
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