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Annelid - Wikipedia, the free encyclopedia
The annelids (Annelida, from Latin anellus, also known as the ringed worms or segmented worms, are a large phylum, with over 17,000 extant species including ragworms, earthworms, and leeches.
https://en.wikipedia.org/wiki/Annelid
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Leech - Wikipedia, the free encyclopedia
Leeches are segmented worms that belong to the phylum Annelida and comprise the subclass Hirudinea.
https://en.wikipedia.org/wiki/Leech
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ADW: Segmented Worms - Annelida
The annelids include earthworms, polychaete worms, and leeches. All members of the group are to some extent segmented, in other words, made up of segments that are formed by subdivisions that partially transect the body cavity.
http://animaldiversity.org/accounts/Annelida/
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Annelida Facts - Encyclopedia
Get information, facts, and pictures about Annelida at Encyclopedia.com. Make research projects and school reports about Annelida easy with credible articles from our FREE, online encyclopedia and dictionary.
http://www.encyclopedia.com/topic/Annelida.aspx
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What is a Worm? - Encyclopedia of Life
What is a worm? Of the thirty-odd phyla in the animal kingdom, at least a third are generally referred to as worms. If you include the more exotic, lesser-known phyla described as "worm-like," it's well over half. So, evolutionarily speaking, it might be easier to narrow down what's not a worm.
http://eol.org/info/448
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Annelid - Britannica
Any member of a phylum of invertebrate animals that are characterized by the possession of a body cavity (or coelom), movable bristles (or setae), and a body divided into segments.
http://www.britannica.com/animal/annelid
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Worms and Leeches - Wet Tropics World Heritage Area
Perhaps you've never spared any thought for worms, except when you are doing some backyard gardening and inevitably find some earthworms with your shovel!
http://www.wettropics.gov.au/worms
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Earthworm vs Leech - Difference and Comparison
Earthworms are big segmented worms that belong to the Phylum Annelida, Class Clitellata, and sub class Oligochaeta. Leeches are also worms belonging to the same Phylum and class, but sub class Hirudinae and are of three types, freshwater, terrestrial and marine.
http://www.diffen.com/difference/Earthworm_vs_Leech
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Annelida - Worms and Leeches
Annelids can be immediately distinguished from most other invertebrates by their external body structure. Annelids are divided into 3 groups, 2 of which are terrestrial and include earthworms.
http://www.ento.csiro.au/education/allies/annelida.html
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