Which one of the following does not belong to Pteropsida ?

Options

A. Selaginella
B. Adiantum
C. Dryopteris
D. Pteris

Answer

To determine which of the following does not belong to Pteropsida, we need to understand the classification and characteristics of Pteropsida.

### Step-by-Step Solution:

1. **Understand Pteropsida**:
- Pteropsida is a class of plants that includes pteridophytes, which are vascular plants that reproduce via spores instead of seeds.

2. **Characteristics of Pteropsida**:
- Pteropsida plants typically have large, dissected leaves.
- They produce sporangia, which are structures that produce spores, located on the adaxial (upper) surface of the leaves.

3. **Classification of Pteropsida**:
- Pteropsida is divided into three main groups:
- **Filicheni** (ferns)
- **Gymnospermi** (gymnosperms)
- **Angiospermi** (angiosperms)

4. **Examples of Pteropsida**:
- Common examples include:
- **Dryopteris** (a type of fern)
- **Adiantum** (another type of fern)
- **Teres** (a genus of ferns)

5. **Analyzing the Options**:
- We need to look at the options provided to identify which one does not belong to Pteropsida.
- One of the options is **Selaginella**.
- Selaginella is classified under the group Lycopodiophyta, which is distinct from Pteropsida.

6. **Conclusion**:
- Since Selaginella does not belong to Pteropsida, the correct answer is **Selaginella**.

### Final Answer:
**Selaginella does not belong to Pteropsida.**