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Watch a video on annelids here.

Introduction to Annelida

Video Credit: Invertebrate Biology Video (YouTube Creative Commons License)


(Ringed / Segmented Worms)

Chapter: Annelids: Welcome


What makes an annelid an annelid?

  • Annelida is a phylum of segmented worms that includes more than 17,000 known species found in a variety of habitats, including freshwater, marine, and terrestrial environments. They are characterized by the presence of repeating segments or rings, and many species have specialized structures such as bristles or parapodia that they use for movement and other functions. Annelids play an important role in many ecosystems, serving as decomposers, predators, prey, and hosts for various parasites. Examples of annelids include earthworms, leeches, and the marine bristle worms.

Chapter: Annelids: Text


Chapter: Annelids

Background Information

Total discovered species: 17,000+ species
Distribution: freshwater, marine, and terrestrial environments

Commonly Associated Terms

annelida, polychaetes, oligochaetes, sipuncula, echiura, pogonophora, vestimentifera

Evolutionary History & Adaptation

Coming Soon

Conservation and Threats

Coming Soon

Chapter: Annelids: List

Chapter Advisors and Contributors

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John Doe
PhD Entomology

Lead Researcher at Bugtopia

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James Doe
MSc Insect Pest Management

Termite Specialist

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Ann Doe
MSc Aquatic Entomology

Entomologist at BugTech

Chapter: Annelids: Our Team
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