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The Protostomate Phyla

The Protostomate Phyla. Annelida Mollusca Arthropoda. Phylum Annelida. Segmented worms True body cavity Paired Protonephric excretory organs Paired ganglia with interconnecting nerves Complete digestive tract. Classes of Annelida. Oligochaeta-few bristles earthworms

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The Protostomate Phyla

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  1. The Protostomate Phyla Annelida Mollusca Arthropoda

  2. Phylum Annelida • Segmented worms • True body cavity • Paired Protonephric excretory organs • Paired ganglia with interconnecting nerves • Complete digestive tract

  3. Classes of Annelida • Oligochaeta-few bristles • earthworms • Polychaeta--many bristles, parapodia • Hirudinea--leeches • Fusion of segments is called tagmatamization

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