A saprobiotic bryophyte is

Options

A. Ricciocarpus
B. Porella
C. Buxbaumia aphylla
D. Sphagnum.

Answer

To determine which bryophyte is saprobiotic, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Saprobiotic Organisms**:
- Saprobiotic organisms are those that feed on dead and decaying organic matter. They play a crucial role in the ecosystem by breaking down organic materials.

2. **Identifying Bryophytes**:
- Bryophytes are non-vascular plants that include mosses, liverworts, and hornworts. Most bryophytes are autotrophic, meaning they can produce their own food through photosynthesis.

3. **Analyzing the Options**:
- The options provided are:
- A) Isocarpus parella
- B) Buxbaumia aphylla
- C) Sphagnum
- D) Neum hornum

4. **Evaluating Each Option**:
- **Isocarpus parella**: Generally known to be autotrophic.
- **Buxbaumia aphylla**: Known to be saprophytic, growing on decaying organic matter.
- **Sphagnum**: Typically autotrophic and forms peat bogs.
- **Neum hornum**: Also known to be more or less saprophytic but less commonly referenced.

5. **Conclusion**:
- Based on the evaluation, **Buxbaumia aphylla** is the correct answer as it is a saprobiotic bryophyte that feeds on decaying organic matter.

### Final Answer:
**Buxbaumia aphylla** is the saprobiotic bryophyte.

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