Which one is not a Aschelminthes?

Options

A. Ascaris (Roundworm)
B. Wuchereria (Filarial worm)
C. Ancylostoma (Hookworm)
D. Flatworm

Answer

To determine which organism is not part of the phylum Aschelminthes, we need to understand the characteristics of this group and then analyze the options provided.

### Step-by-Step Solution:

1. **Understand Aschelminthes**:
- Aschelminthes, also known as pseudocoelomates, are a group of animals characterized by having a pseudocoelom (a body cavity that is not completely lined by mesoderm).
- They are typically round-bodied and possess a body structure that includes pouches of mesoderm.

2. **Identify the Characteristics**:
- Aschelminthes includes organisms that are pseudoblastic, meaning they have a body plan that includes ectoderm, mesoderm, and endoderm layers.
- Common examples of Aschelminthes include nematodes (roundworms) and rotifers.

3. **Analyze the Options**:
- Without the specific options provided in the question, we can generally consider common organisms that are often confused with Aschelminthes.
- For example, organisms like annelids (segmented worms) or flatworms (Platyhelminthes) are not part of Aschelminthes.

4. **Conclusion**:
- If the options include organisms like annelids or flatworms, then those would be the correct answers as they do not belong to the Aschelminthes phylum.