The largest genus of earthworm is

Options

A. Megascolex
B. Pheretima
C. Megascolides
D. Lumbicus

Answer

**Step-by-Step Solution:**

1. **Understanding Earthworms**: Earthworms are segmented worms that belong to the phylum Annelida. They have a tube-shaped body and are important for soil health.

2. **Identifying the Options**: The question provides several options for the largest genus of earthworms:
- a) Megascolec
- b) Ferritima
- c) Megascolides
- d) Lembiricas

3. **Analyzing Each Option**:
- **Megascolec**: This is a family of large-sized earthworms, primarily found in Australia and New Zealand.
- **Ferritima**: This genus is found mainly in Southeast Asia and is characterized by having a clitellum.
- **Megascolides**: This is another genus of earthworm belonging to the family Megascolecidae.
- **Lembiricas**: This genus contains some of the most commonly seen earthworms in Europe and has around 700 valid species.

4. **Determining the Largest Genus**: Among the options, Lembiricas is noted for having the most valid species (approximately 700), making it the largest genus of earthworms.

5. **Conclusion**: Therefore, the largest genus of earthworm is **Lembiricas**.

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