The body surface of annelids is distinctly marked out into segments. These segements are called as:

Answer

**Step-by-Step Text Solution:**

1. **Understanding Annelids**: Annelids are a phylum of invertebrate animals known for their segmented bodies. The most common example of annelids is the earthworm.

2. **Characteristics of Annelids**: One of the defining features of annelids is that their bodies are long and distinctly segmented. Each segment is known to perform specialized functions.

3. **Terminology**: The segments in annelids are specifically referred to as "metamers." This term comes from the process of segmentation known as "metamerism," which is a characteristic feature of this phylum.

4. **Conclusion**: Therefore, the segments on the body surface of annelids are called metamers.

**Final Answer**: The segments are called metamers.

---