What is the location and significance of clitellum in earthworm?

Explanation

**Step-by-Step Solution:**

1. **Identify the Earthworm Structure**: The clitellum is a specific structure found in mature earthworms.

2. **Determine the Location**: The clitellum is located on the body of the earthworm, specifically covering segments 14 to 16.

3. **Describe the Appearance**: It appears as a dark, prominent band on these segments, which distinguishes it from other parts of the earthworm's body.

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