The phylum Annelida are the segmented worms. The three main groups are the Polychaeta, such as the lugworms, some of which are free living but others living in tubes, the Oligochaeta such as the earthworm and the Hirudinea, which are the leeches. All have bodies supported by internal pressure, a hydrostatic skeleton, and are divided into segments.
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Sites 7
Information on these organisms and their phylogenetic relationships from the Tree of Life Web Project, with photographs of several species.
Introduction to the Annelida, the segmented worms.
The segmented worms, including earthworms, polychaete worms, and leeches.
Provides information on this diverse phylum, the characteristics of worms, and information on the three classes, Polychaeta, Aelosomata and Clitellata.
Information about the Earthworm Research Group at the University of Central Lancashire.
Photographs and links to other worm pages, from the University of Hawaii at Manoa.
Article by Wim van Egmond introducing oligochaetes, flatworms and nematodes with several photographs.
Article by Wim van Egmond introducing oligochaetes, flatworms and nematodes with several photographs.
Information about the Earthworm Research Group at the University of Central Lancashire.
The segmented worms, including earthworms, polychaete worms, and leeches.
Provides information on this diverse phylum, the characteristics of worms, and information on the three classes, Polychaeta, Aelosomata and Clitellata.
Information on these organisms and their phylogenetic relationships from the Tree of Life Web Project, with photographs of several species.
Photographs and links to other worm pages, from the University of Hawaii at Manoa.
Introduction to the Annelida, the segmented worms.
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May 27, 2023 at 6:25:04 UTC
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