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Topic: Aschelminthes

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	Aschelminthes - MSN Encarta
		The name aschelminth, which means “sac worm,” refers to the fluid-filled cavity that is present in many of these animals and serves as a kind of skeleton.
		Aschelminthes frequently live in water or soil or as parasites of plants or animals.
		Other pseudocoelomates that are probably closely related to the aschelminthes are the spiny-headed worm and the moss animals.
	encarta.msn.com /encyclopedia_761576092/Aschelminthes.html (201 words)

	Aschelminthes - Palaeos
		Aschelminthes is often encountered as a phylum in older animal classifications, uniting most or all of the pseudocoelomate taxa.
		Of the previous "Aschelminthes", the Scalidophora (including Priapulida and Kinorhyncha), Nematoda and Nematomorpha are included in Ecdysozoa.
		Other prominent pseudocoelomate taxa that were generally not included in Aschelminthes are the Acanthocephala (Platyzoa, probably within Rotifera) and the Tardigrada (Ecdysozoa, within Panarthropoda).
	www.palaeos.org /Aschelminthes (161 words)

	Introduction to the "Aschelminth" Phyla
		Aschelminths used to be referred to as "pseudocoelomates" -- an alternative name for the taxon is Pseudocoelomata -- because of their supposed shared internal structure.
		A number of aschelminths are parasitic, including the Acanthocephala, which parasitize vertebrates; the Nematomorpha, which parasitize insects and other arthropods; and the Nematoda, which include parasites of plants and animals as well as many non-parasitic, free-living species.
		Many small aschelminths, in particular many rotifers and nematodes, are able to suspend their life processes completely when conditions become unfavorable; in these resistant states they can survive extreme drying, heat, or cold, and then return to life when favorable conditions return.
	www.ucmp.berkeley.edu /aschelminthes/aschelminthes.html (941 words)

	Platyhelminthes, Aschelminthes, and Proarthropods – Københavns Universitet
		Zoological Museum, University of Copenhagen (ZMUC) has a long history in the study of "Lower Worms" (Platyhelminthes, Nemertina and Aschelminthes) and the so-called Proarthropods (Tardigrada, Onychophora and Pentastomida).
		Taxonomy and phylogeny of Aschelminthes, with particular emphasis on Gnathostomulida, Kinorhyncha and Loricifera.
		Description of a new group of Aschelminthes from homothermic springs (Greenland).
	zoologi.snm.ku.dk /samlinger/invertebrater/aschelminthes (255 words)

	Animal - Printer-friendly - ninemsn Encarta
		The body cavity of these usually small to microscopic, worm-shaped animals is a pseudocoelom, and they lack a circulatory system.
		Most pseudocoelomates are often grouped into a single phylum, Aschelminthes, with several classes.
		Alternatively, as here, each class is a phylum, and Aschelminthes is a superphylum.
	au.encarta.msn.com /text_761558664___19/Animal.html (267 words)

	Teaching Animal Molecular Phylogenetics
		She regarded the aschelminths as being in a separate line of Protostomia from that of Arthropoda.
		HISTORY: Hyman included the gastrotrichs with nematodes in the phylum Aschelminthes on the basis of "slight spaces" between the body wall and viscera, which she characterized as "presumably of the nature of a pseudocoel as they have no definite lining but their embryonic origin is as yet unknown (1951, vol.
		She noted, however, that the pseudocoel in acanthocephalans does not form in the same manner as in other pseudocoelomates, and serological studies suggested that among the intestinal parasites acanthocephalans were closer to cestodes than to nematodes.
	www.mhhe.com /biosci/pae/zoology/animalphylogenetics/section03.mhtml (6091 words)

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