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Kinorhynchs (Cephalorhyncha) | |
 | Catalogue / Culture / Sciences / Biologie / Biologie des organismes / Zoologie / Zoologie des invertébrés / Kinorhynchs (Cephalorhyncha) |
| Catalogue / Culture / Sciences / Biologie / Biologie des organismes / Zoologie / Zoologie des invertébrés / Pseudocoelomata / Kinorhynchs (Cephalorhyncha) |
| Catalogue / Culture / Sciences / Biologie / Biologie des organismes / Zoologie / Taxonomie: Animaux (Animalia) / Animals Types / Kinorhynchs (Cephalorhyncha) |
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Kinorhyncha
Part of Tree of Life. [eng] |
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Introduction to the "Aschelminth" Phyla
Acanthocephala -- spiny-headed parasitic worms; about 1150 species known Chaetognatha -- arrowworms; about 70 species known. Cycliophora -- cycliophorans; 1 species known, microscopic Gastrotricha -- gastrotrichs; about 430 species known, all microscopic Kinorhyncha -- kinorhynchs; about 150 species known, all microscopic Loricifera -- loriciferans; about 10 species described, all microscopic Nematoda -- nematodes or roundworms; about 12,000 species known, but an estimated 200,000+ species extant, mostly microscopic Nematomorpha -- horsehair worms; about 320 species known Priapulida -- priapulid worms; 16 species known, abut half microscopic Rotifera -- rotifers or "wheel animalcules"; about 1500 species known, all microscopic [eng] |
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Introduction to the Cephalorhyncha
The Cephalorhyncha are a group of ecdysozoan animals that traditionally have been classified together with a variety of unusual and lesser known organisms in a larger group variously known as the Aschelminthes, Nemathelminthes, and/or Pseudocoelomata. This larger group is now known to be polyphyletic, and contained several taxa that were not closely related. However, one part of that group -- the priapulids, kinorhynchs, and loriciferans -- appears to form a group in its own right. Now these organisms are grouped with the nematodes and arthropods based on a set of shared characters including the presence of a cuticle and the fact that they periodically shed their cuticle in a process called ecdysis. Some zoologists have suggested an even closer relationship with the nematodes, and call the combination of nematodes and cephalorhynchs the Cycloneuralia. [eng] |
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Literaturliste der Scalidophora (Priapulida, Kinorhyncha und Loricifera)
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