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Topic: Annelid

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Annelida

Lumbriculidae

Leech

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	Annelid - Wikipedia, the free encyclopedia
		Annelids are triploblastic protostomes with a coelom, closed circulatory system and true segmentation.
		The annelid fossil record is sparse, but a few definite forms are known as early as the Cambrian, and there are some signs they were around in the later Precambrian, but the earliest unequivocal annelid fossils are only known from the Cambrian.
		Annelids and Mollusks are thus united as the Trochozoa, a taxon more strongly supported by molecular evidence.
	en.wikipedia.org /wiki/Annelid (1081 words)

	[No title]
		The annelids, collectively called Annelida, are a large phylum of animals, comprising the segmented worms, with about 15000 modern species including the well-known earthworms and leeches.
		The annelid fossil record is sparse, but a few definite forms are known as early as the Cambrian, and there are some signs they were around in the later Precambrian.
		The arthropods and their kin have long been considered the closest relatives of the annelids, on account of their common segmented structure, but a number of differences between the two groups suggest this may be convergent evolution.
	wikiwhat.com /encyclopedia/a/an/annelid.html (533 words)

	Annelid - MSN Encarta
		Although annelids are diverse in form, the bristle worms, which generally are considered the ancestral stock, can exemplify their structure.
		The elongate body is rounded in cross section, with a mouth (sometimes jawed) at one end and an anus at the other, and it exhibits bilateral symmetry.
		Fossil annelids are rare because their soft bodies do not preserve well.
	encarta.msn.com /encyclopedia_761560164/Annelid.html (445 words)

	The Annelids (Phylum Annelida)
		Annelids range in size from the Giant Earthworms, of which Michrochaetus rappi (Michrochaetus michrochaetus) is the largest, this magnificent animal has an average length of 1.36 m (54 ins) and a record breaking specimen has been recorded that measured 6.7 metres (22 ft) in length, it was 2cm (0.8 ins) in diametre.
		Annelids are coelomate animals meaning they have a true coelom within their body.
		Annelids are coelomate animals (meaning they have a true coelom, even if this is reduced secondarily).
	www.earthlife.net /inverts/annelida.html (1739 words)

	Annelid
		Many annelids have some regenerative abilities, often to the point where each half of an adult divided cross-wise will survive.
		The arthropods and their kin have long been the closest relatives of the annelids, on account of their common segmented structure, but a number of differences between the two groups suggest this may be convergent evolution.
		The other major phylum which is of definite relation to the annelids are the molluscs, which share with them the presence of trocophore larvae.
	www.ebroadcast.com.au /lookup/encyclopedia/an/Annelid.html (421 words)

	Highbeam Encyclopedia - Search Results for annelid
		The pseudocoelom is contrasted with the coelom of mollusks, annelid worms,
		Size and organic content of eggs of marine annelids, and the underestimation of egg energy content by dichromate oxidation.
		Polychaetous annelid assemblages associated with sediments near seven shallow wastewater outfalls along the Tijuana-Ensenada costal corridor in Northern Baja California, Mexico.
	www.encyclopedia.com /SearchResults.aspx?Q=annelid (654 words)

	Annelid \| Biology
		Annelids, or true-segmented worms, are members of the animal phylum Annelida, the most complex of all wormlike groups of organisms.
		Annelids are commonly found in terrestrial, as well as marine, brackish, estuarine, and freshwater ecosystems worldwide.
		Most annelids are free-living, although several species have parasitic, mutualistic, or commensal relationships with other animals, and many species are commonly associated with aquatic and terrestrial plants.
	www.accessmylibrary.com /coms2/summary_0193-8930_ITM (109 words)

	Annelid - Search Results - ninemsn Encarta
		Annelid, common name for about 9,000 species of worm-like invertebrate animals with well-developed segmentation.
		Gill, one of the paired respiratory organs, also called branchia, in many animals that breathe air dissolved in water; also found in the embryo stage...
		Earthworm, name given to more than 1,000 species of worms in a class of the annelid phylum.
	au.encarta.msn.com /Annelid.html (106 words)

	Annelida
		Earthworms and leeches are the familiar annelids for most people, but polychaetes comprise the bulk of the diversity of Annelida and are found in nearly every marine habitat, from intertidal algal mats downwards.
		Segments are formed sequentially in annelids and are established during development from growth zones located at the posterior end of the body; so the youngest segment in the body of an annelid is always the most posterior.
		Annelid Resources: Another can of Worms: Phylum Annelida, polychaetes, oligochaetes, leeches, vent worms, etc. A guide to information on annelids, and current worm research and researchers.
	www.tolweb.org /tree?group=Annelida&contgroup=Bilateria (2514 words)

	WormNet Symposium (Site not responding. Last check: 2007-10-22)
		Furthermore, because annelids are one of the most evolutionarily successful “phyla” and because they diversified in the late PreCambrian to early Cambrian, understanding their early evolutionary history is paramount to understanding the evolution of animal life.
		This symposium includes speakers that will address annelid phylogeny and evolutionary mechanisms of segmentation in order to review the recent advances in the field and explore areas that need to be addressed.
		Annelids in the Mist: The Influence of a New Marker
	www.auburn.edu /biology/faculty/halanych/WormNet (250 words)

	Annelid Resources at annelida.net : Another can of Worms: Phylum Annelida, polychaetes, oligochaetes, leeches, vent ... (Site not responding. Last check: 2007-10-22)
		Annelid Resources is here at www.annelida.net, and is no longer hosted at Biocollections.org.
		Segmented worms such as earthworms and seaworms, and the leeches are annelids.
		Annelid Resources is compiled and maintained by Geoff Read.
	www.annelida.net (98 words)

	Introduction to the Annelida (Site not responding. Last check: 2007-10-22)
		Annelids can be told by their segmented bodies.
		An Annelid Worm Biodiversity List is available, with links to a large number of annelid-related resources of all sorts.
		And not to forget the third main class of annelids, Mark Siddal's Hirudinea pages present original work on the evolution of leeches.
	www.ucmp.berkeley.edu /annelida/annelida.html (164 words)

	The Shape of Life . Annelids \| PBS
		Far from being lowly worms, annelids are impressively powerful and capable animals.
		Annelids are distinguished by ring-like external bands along their muscular body wall that coincide with internal partitions dividing their bodies into segments.
		Annelids creep along or burrow by coordinating two sets of muscles.
	www.pbs.org /kcet/shapeoflife/animals/annelids.html (226 words)

	OEDILF - Word Lookup
		Annelids (AN-uh-lidz) — the name comes from the Latin word meaning "little ring" — are segmented worms.
		There are thousands of species and three big groups thereof: the group including earthworms; their close cousins, leeches; and polychaetes (from Greek words meaning "many bristles").
		Some annelids reproduce asexually, by splitting off a bit of themselves.
	www.oedilf.com /db/Lim.php?Word=annelid (188 words)

	Persistent Ancestral Feeding Structures in Nonfeeding Annelid Larvae -- Pernet 205 (3): 295 -- The Biological Bulletin
		Relationships of sabellariid, serpulid, and sabellid annelids, as indicated by cladistic analyses of morphological and reproductive characters by Fitzhugh (1989) and Rouse and Fitzhugh (1994).
		Diagrammatic ventral view of a larva of a serpulid annelid, showing structures used in the opposed-band feeding system and the path of a particle (arrowhead) captured from suspension.
		Feeding larvae of echinoid echinoderms or serpulid annelids
	www.biolbull.org /cgi/content/full/205/3/295 (6542 words)

	www.myspace.com/annelid
		Annelid hit the music scene in Winnipeg on April 28th 2005 to an unsuspecting crowd and received an instant and overwhelming positive response.
		Through Jasons eccentric blend of shred and Gothenburg influenced sound, Teds precise and ludicrous skin bashing, the intensity of Patricks voice and lyrics, the element of Jens keyboards, and the low end dominance by Graeme, they are developing a sound of their own.
		Beginning as an afterthought, Annelid was brought together through mutual acquaintances, starting from the remains of a previous band Jason and Graeme had attempted to create, and Patrick who was writing and recording music on his own.
	www.myspace.com /annelid (791 words)

	Amazon.com: annelid (Site not responding. Last check: 2007-10-22)
		Embryology and phylogeny in annelids and arthropods (International series of monographs in pure and applied biology.
		Energetical significance of the annelids and arthropods in a Swedish grassland soil (Ecological bulletins) by T Persson (Unknown Binding - 1977)
		Polychaetous annelids erected by Treadwell, 1891 to 1948,: together with a brief chronology (Bulletin of the American Museum of Natural History, v.
	www.amazon.com /s?ie=UTF8&search-alias=aps&keywords=annelid&page=1 (323 words)

	More on Annelid Morphology
		Annelids are coelomate animals; they have a fluid-filled body cavity in which the gut and other organs are suspended.
		Oligochaetes and polychaetes typically have spacious coeloms; in leeches, the coelom is reduced to a system of narrow canals, and archiannelids may lose the coelom entirely.
		The coelom is divided into separate compartments by partitions called septa, which give the "segmented worms" their segmented appearance.
	www.ucmp.berkeley.edu /annelida/annelidamm.html (64 words)

	Worms: Annelid Worms: Oligochaetes. Text with photomicrographs. (Site not responding. Last check: 2007-10-22)
		Their bodies are cylindrical or flattened, and are divided into a number of segments which may be as few as a dozen or so, or more than a hundred.
		Included in this phylum are the leeches, the marine bristle worms, and the earthworms.
		The annelids are usually divided into three classes: Oligochaete worms, Polychaete worms, and the Hirudinae, or leeches.
	www.micrographia.com /specbiol/helmint/annelhom/olig0100.htm (555 words)

	Analog Annelid: Downloads (Site not responding. Last check: 2007-10-22)
		I retain the copyright, but feel free to distribute the.zip files linked above as long as they are unmodified and no profit is made from their distribution.
		Although I consider Analog Annelid a final release, I haven't been able to test it on many types of hardware.
		Source code is available for Analog Annelid, but this project is not "Open Source".
	www.garthgillespie.com /annelid/download.php (295 words)

	MavicaNET - Annelid worms (Annelida)
		Introduction to this small phylum, closely related to the Annelids, from UCMP Berkeley.
		Description of the general characteristics of annelid worms.
		Narrative on arthropods and annelid worms of old-growth and late successional conifer forests, mature riparian woods, and of coarse woody debris associated arthropods within the range of the northern spotted owl (Strix occidentalis caurina).
	www.mavicanet.com /lite/fin/3698.html (295 words)

	Category:Annelids - Wikipedia, the free encyclopedia
		Articles and media on this topic in other Wikimedia projects can be found at: Commons Category Annelids
		The annelids, collectively called Annelida, are a large phylum of animals, comprising the segmented worms, with about 15 000 modern species including the well-known earthworms and leeches.
		For more information, see the article about Annelid.
	en.wikipedia.org /wiki/Category:Annelids (94 words)

	Analog Annelid
		Analog Annelid is a remake of the ubiquitous "Snake" and "Worm" games in which the player controls the movement of such a creature in an attempt to collect apples, numbers, or whatever.
		This is for the sake of easier programming both in the game itself and in the display of graphics.
		Analog Annelid absolves itself of this stigma for a smooth, free-flowing game world and more complex gameplay.
	www.garthgillespie.com /annelid (177 words)

	Annelid Introduction 2
		In locomotion, metamerism provides a more effective system for body movement; the body is divided into a consecutive series of motor units that can be controlled separately or in a wave of contraction.
		In annelids, the separation of the coelom by transverse septa means that the forces of muscular contraction are not transferred through the organism.
		The Classification of Annelids - There are three classes of living annelids: Class Polychaeta (marine worms), Class Oligochaeta (earthworms and some freshwater forms) and Class Hirudinea (leeches).
	bioweb.uwlax.edu /zoolab/Table_of_Contents/Lab-6a/Annelid_Introduction_2/annelid_introduction_2.htm (187 words)

	Annelid Resources Virtual Field Trips around the internet
		There are hundreds of web pages on the Net that happen to mention various annelids and polychaetes, yet comparatively few of significant information content.
		That's still a gopher link, and in case it disappears here is the link for the CAS Invert.
		Friend earthworm; practical application of a lifetime study of habits of the most important animal in the world" (1941) by George Sheffield Oliver.
	www.annelida.net /field-t.html (2106 words)

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