List of bilaterian 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.

Phylum Xenacoelomorpha

Subphylum Xenoturbelida
Subphylum Acoelomorpha

Nephrozoa (unranked)

Superphylum Deuterostomia

Phylum Chordata

Main article: List of chordate orders

Ambulacraria

Phylum Hemichordata

Acorn worm
Class Enteropneusta (Acorn worms)
  • Order Enteropneusta
Class Graptolithina †
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 enigmatus

No class, one order Nanaloricida

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

Panarthropoda (unranked)

Phylum Lobopodia †
Class Xenusia
Phylum Onychophora

No classes, no orders, families Peripatidae and Peripatopsidae

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
Class Monogononta
Class Seisonidea
Phylum Acanthocephala
Scanning electron microscopy of proboscis of an archiacanthocephalan [1]
Class Archiacanthocephala
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
Subphylum Neodermata
Class Cestoda
Class Monogenea
Class Trematoda
Botulus microporus
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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