The worm which is known as filarial worm is_________.

Explanation

**Step-by-Step Solution:**

1. **Identify the Type of Worm**: The question asks for the name of the worm known as a filarial worm.

2. **Name the Filarial Worm**: The specific filarial worm is called *Wuchereria bancrofti*.

3. **Classification**: This worm belongs to the phylum Nematoda, which is commonly known as roundworms.

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