List of bilateral animal orders

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The relative number of species contributed to the total by each phylum of animals. Arthropoda is the phylum with the most individual organisms.
Superb fairy-wren, Malurus cyaneus
Differences between Deuterostomes and Protostomes
Yellow-winged darter, Sympetrum flaveolum
Pseudobiceros bedfordi, (Bedford's flatworm)
The use of love darts by the land snail Monachoides vicinus is a form of sexual selection

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.

 
Xenacoelomorpha
 

Xenoturbellida

 
Acoelomorpha
 

Nemertodermatida

 
 

Acoela

 
 
 
Nephrozoa*
Deuterostomia*
Chordata
 

Cephalochordata

 
Olfactores
 

Urochordata

 
 

Craniata (including Vertebrata)

 
 
 
Ambulacraria
 

Echinodermata

 
 

Hemichordata

 
 
 
Protostomia*
 

Chaetognatha

 
Ecdysozoa*
Nematozoa
 

Nematoda

 
 

Nematomorpha

 
 
 

Tardigrada

 
 
 

Onychophora

 
 

Arthropoda

 
 
Scalidophora
 

Priapulida

 
 

Loricifera

 
 

Kinorhyncha

 
 
 
Spiralia*
Polyzoa
 

Bryozoa

 
 
 

Entoprocta

 
 

Cycliophora

 
 
 
Trochozoa*
 

Annelida

 
 

Mollusca

 
 

Nemertea

 
 
 

Brachiopoda

 
 

Phoronida

 
 
 
Platyzoa*
 

Gastrotricha

 
 

Platyhelminthes

 
Gnathifera
 

Gnathostomulida

 
 

Micrognathozoa

 
 

Rotifera

 
 
 
 
 
 
 

Phylum Xenacoelomorpha[]

Subphylum Xenoturbelida
Subphylum Acoelomorpha

Nephrozoa (unranked)[]

Infrakingdom Deuterostomia[]

Phylum Chordata[]

Main article: List of chordate orders

Ambulacraria[]

Phylum Hemichordata[]

Acorn worm
Class Enteropneusta (Acorn worms)
  • Order Enteropneusta
Class Graptolithina †
  • Order Camaroidea †
  • Order Crustoidea †
  • Order Dendroidea †
  • Order Dithecoidea †
  • Order Graptoloidea †
  • Order †
  • Order Tuboidea †
Class Planctosphaeroidea

No order, one genus, one species Planctosphaera pelagica

Class Pterobranchia

Phylum Echinodermata[]

Main article: List of echinodermata orders

Infrakingdom Protostomia[]

Superphylum Ecdysozoa[]

Cycloneuralia (unranked)[]

Scalidophora (unranked)[]
Phylum Kinorhyncha[]
Kinorhyncha

No class, 2 orders, called mud dragons, very common in mud or sand

Phylum Loricifera[]
Pliciloricus enigmaticus or

No class, one order Nanaloricida

Phylum Priapulida[]
Priapulus caudatus
Class Priapulimorpha
Class Halicryptomorpha
  • Order Halicryptomorphida
Class Seticoronaria
  • Order Seticoronarida
      • Genus Maccabeus
Nematoida (unranked)[]
Phylum Nematoda[]
See also: List of nematode families
Phylum Nematomorpha[]
Class Gordioidea
Class Nectonematoida

Panarthropoda (unranked)[]

Phylum Lobopodia †[]
Class Dinocaridida
Class Xenusia
Phylum Onychophora[]
Tactopoda (unranked)[]
Phylum Tardigrada[]
Hypsibius dujardini
Echiniscus
Class Eutardigrada
Class Heterotardigrada
Phylum Arthropoda[]
Main article: List of arthropod orders

Spiralia (unranked)[]

Gnathifera (unranked)[]

Phylum Gnathostomulida[]

No classes

Phylum Micrognathozoa[]

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

Phylum Cycliophora[]
Class Eucycliophora
  • Order Symbiida
Syndermata (unranked)[]
Phylum Rotifera[]
Figure 1: 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
Class Seisonidea
  • Order Seisonida
Phylum Acanthocephala[]
Scanning electron microscopy of proboscis of an archiacanthocephalan [1]
Class Archiacanthocephala
  • Order Apororhynchida
  • Order Gigantorhynchida
  • Order Moniliformida
  • Order Oligacanthorhynchida
Class Eoacanthocephala
Class Palaeacanthocephala

Platytrochozoa (unranked)[]

Mesozoa (unranked)[]
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

Rouphozoa (unranked)[]
Phylum Platyhelminthes[]
Taenia saginata
Class Rhabditophora
  • Subclass Macrostomorpha
    • Order
  • Subclass Trepaxonemata
    • Infraclass Neoophora
      • Parvclass
      • Order Bothrioplanida
      • Order Lecithoepitheliata
      • Order Proseriata
    • Order
    • Order Polycladida
    • Order
Subphylum Neodermata
Class Cestoda
Class Monogenea
Class Trematoda
Helicometra
Phylum Gastrotricha[]

No classes

Superphylum Lophotrochozoa[]
Phylum Mollusca[]
Main article: List of mollusc orders
Phylum Annelida[]
Main article: List of Annelid families
Kryptotrochozoa (unranked)[]
Phylum Nemertea
Lophophorata (unranked)

No classes, no orders, family Phoronidae

No classes, no orders, families Barentsiidae, Loxokalypodidae, Loxosomatidae and Pedicellinidae

References[]

  1. ^ Amin, O. A; Heckmann, R. A; Ha, N. V. (2014). "Acanthocephalans from fishes and amphibians in Vietnam, with descriptions of five new species. '". Parasite. 21: 53. doi:10.1051/parasite/2014052. PMC 4204126. PMID 25331738.
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