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.
- Subphylum
Xenoturbelida
- Subphylum
Acoelomorpha
Acorn worm
- Class Enteropneusta (
Acorn worms)
- Class
Graptolithina †
- Class
Planctosphaeroidea
No order, one genus, one species Planctosphaera pelagica
- Class
Pterobranchia
Kinorhyncha
No class, 2 orders, called mud dragons, very common in mud or sand
Pliciloricus enigmaticus or
enigmatus
No class, one order Nanaloricida
Priapulus caudatus
- Class Priapulimorpha
- Class
Halicryptomorpha
- Class Seticoronaria
- Class
Gordioidea
- Class
Nectonematoida
- Class
Xenusia
No classes, no orders, families Peripatidae and Peripatopsidae
Hypsibius dujardini
Echiniscus
- Class
Eutardigrada
- Class
Heterotardigrada
No classes
Some dispute here with Micrognathozoa as the class and
Limnognathia as the order
Phylum Cycliophora
- Class Eucycliophora
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
Scanning electron microscopy of proboscis of an archiacanthocephalan
[1]
- Class
Archiacanthocephala
- Class
Eoacanthocephala
- Class
Palaeacanthocephala
No classes, no orders, families Conocyemidae, Dicyemidae and Kantharellidae
No classes, no orders, family Salinellidae
No classes, no orders, families Pelmatosphaeridae and Rhopaluridae
Phylum Platyhelminthes
Taenia saginata
- Class
Rhabditophora
- Subphylum
Neodermata
- Class
Cestoda
- Class
Monogenea
- Class
Trematoda
Botulus microporus
Helicometra
No classes
- Phylum
Nemertea
-
Lophophorata (unranked)
No classes, no orders, family Phoronidae
No classes, no orders, families Barentsiidae, Loxokalypodidae, Loxosomatidae and Pedicellinidae
References