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Class Polychaeta: the polychaetes, Class Oligochaeta: the earthworms, Class Hirudinea: the leeches

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11y ago
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1w ago

The three classes of Phylum Annelida are Polychaeta, Oligochaeta, and Hirudinea. Polychaeta are marine worms with bristles called chaetae, Oligochaeta include earthworms with few chaetae, and Hirudinea are leeches that are mostly freshwater and have suckers for attachment.

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Q: What are the three classes of Phylum Annelida?
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