Hirudinea  (8) Oligochaeta  (6) Pogonophora  (2) Polychaeta  (14)

See also:

• Science: Agriculture: Animals: Worms  (50)

• Annelida - Information on these organisms and their phylogenetic relationships from the Tree of Life Web Project, with photographs of several species.
• Annelida - Introduction - Annelid worms, brought to you by Biological Sciences at the University of Paisley.
• Center for Annelida Resources - The Illinois Natural History Survey Annelida Collection is one of the largest state collections of freshwater oligochaetes in the USA, holding more than 300,000 specimens.
• Introduction to the Annelida - Introduction to the Annelida, the segmented worms.
• Phylum Annelida - The segmented worms, including earthworms, polychaete worms, and leeches.
• Polychaetes, Bristle Worms, Featherduster Worms and Leeches - Photographs and information from the Underwater Field Guide to Ross Island and McMurdo Sound, Antarctica.
• UCSC Annelida - Anatomical illustrations of segmented worms from the University of California at Santa Cruz.
• Wormlab - Photographs and links to other worm pages, from the University of Hawaii at Manoa.

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