| Allomalorhagida | |
|---|---|
 | |
| Cristaphyes glaurung | |
Scientific classification  | |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Kinorhyncha |
| Class: | Allomalorhagida |
| Families | |
See text | |
| Synonyms | |
| |
Allomalorhagida is a class of worms belonging to the phylum Kinorhyncha. The class historically had no orders, and was only divided into families. [1] Recently, Pycnophidae has been found to be sister to the order Anomoirhaga, comprising the other four families. [2]
Allomalorhagida consists of the following families: [1]
Euglenozoa are a large group of flagellate Discoba. They include a variety of common free-living species, as well as a few important parasites, some of which infect humans. Euglenozoa are represented by four major groups, i.e., Kinetoplastea, Diplonemea, Euglenida, and Symbiontida. Euglenozoa are unicellular, mostly around 15–40 μm (0.00059–0.00157 in) in size, although some euglenids get up to 500 μm (0.020 in) long.
Kinorhyncha is a phylum of small marine invertebrates that are widespread in mud or sand at all depths as part of the meiobenthos. They are commonly called mud dragons. Modern species are 1 mm (0.039 in) or less, but Cambrian forms could reach 4 cm (1.6 in).
Piperales is an order of flowering plants. It necessarily includes the family Piperaceae but other taxa have been included or disincluded variously over time. Well-known plants which may be included in this order include black pepper, kava, the many Peperomias, pepper elder, lizard's tail, birthwort, and wild ginger. The two perianthless families Piperaceae and Saururaceae are mainly herbaceous plants possessing highly reduced flowers.
Cycloneuralia is a proposed clade of ecdysozoan animals including the Scalidophora, the Nematoida, and the extinct Palaeoscolecid. It may be paraphyletic, or may be a sister group to Panarthropoda. Or perhaps Panarthropoda is paraphyletic with respect to Cycloneuralia. The group has also been considered a single phylum, sometimes given the old name Nemathelminthes. The uniting character is the nervous system organization with a circumpharyngeal brain and somata–neuropil–somata pattern. The name derives from the position of the brain around the pharynx.
Eurotiomycetes is a large class of ascomycetes with cleistothecial ascocarps within the subphylum Pezizomycotina, currently containing around 3810 species according to the Catalogue of Life. It is the third largest lichenized class, with more than 1200 lichen species that are mostly bitunicate in the formation of asci. It contains most of the fungi previously known morphologically as "Plectomycetes".
Scalidophora is a group of marine pseudocoelomate ecdysozoans that was proposed on morphological grounds to unite three phyla: the Kinorhyncha, the Priapulida and the Loricifera. The three phyla have four characters in common — chitinous cuticle that is moulted, rings of scalids on the introvert, flosculi, and two rings of introvert retracts. The introvert and abdomen are separated by a distinct neck region in all groups, but in adult macroscopic priapulids it becomes rudimentary in Priapulus and is completely absent in Halicryptus. However, the monophyly of the Scalidophora was not supported by two molecular studies, where the position of the Loricifera was uncertain or as sister to the Panarthropoda. Both studies supported a reduced Scalidophora comprising the Kinorhyncha and Priapulida as sister phyla. Their closest relatives are the Panarthropoda, Nematoda and Nematomorpha.
The sternum is the ventral portion of a segment of an arthropod thorax or abdomen.
A tergum is the dorsal ('upper') portion of an arthropod segment other than the head. The anterior edge is called the 'base' and posterior edge is called the 'apex' or 'margin'. A given tergum may be divided into hardened plates or sclerites commonly referred to as tergites.
Cyclorhagida is a class of kinorhynchs, which are small marine invertebrates.
Antygomonas is a genus of cyclorhagids. It is the only genus in the family Antygomonidae Adrianov & Malakhov, 1994. Species of Antygomonas are commonly referred to as "mud dragons."
The biological systematics and taxonomy of invertebrates as proposed by Richard C. Brusca and Gary J. Brusca in 2003 is a system of classification of invertebrates, as a way to classify animals without backbones.
The taxonomy of the animals presented by Hutchins et al. in 2003 in Grzimek's Animal Life Encyclopedia is a system of classification which covers all the metazoans, from phyla to orders.
Echinoderes obtuspinosus is a species of mud dragons first found in coastal and subtidal locations around the Korean Peninsula and in the East China Sea.
The clade Multicrustacea constitutes the largest superclass of crustaceans, containing approximately four-fifths of all described crustacean species, including crabs, lobsters, crayfish, shrimp, krill, prawns, woodlice, barnacles, copepods, amphipods, mantis shrimp and others. The largest branch of multicrustacea is the class Malacostraca.
Echinoderidae is a family of kinorhynchs in the class Cyclorhagida.
Cephalorhyncha is a genus of kinorhynchs in the family Echinoderidae.
Neocentrophyidae is a family of kinorhynchs in the class Allomalorhagida.
Pycnophyidae is a family of kinorhynchs in the class Allomalorhagida.
Cateriidae is a family of kinorhynchs placed either in the class Cyclorhagida or Allomalorhagida. It consists of a single genus, Cateria Gerlach, 1956.
Dasydytidae is a family of gastrotrichs in the order Chaetonotida.
Kinorhynch families and genera | |||||||
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| Stem-group |  | ||||||
| Cyclorhagida |
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| Allomalorhagida |
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